This talk, as an experimental flavour overview presentation, will cover the latest results from the LHCb/Belle-II/ATLAS/CMS/BESIII/g-2/mu2e/COMET experiments.
In High Energy Physics (HEP) experiment, Data Quality Monitoring (DQM) system is crucial to ensure the correct and smooth operation of the experimental apparatus during data taking. DQM at Jiangmen Underground Neutrino Observatory (JUNO) will reconstruct raw data directly from JUNO Data Acquisition (DAQ) system and use event visualization tools to show the detector performance for high quality...
High-purity germanium detectors are used in the search for rare events such as neutrinoless
double-beta decay, dark matter and other beyond Standard Model physic. Due to the
infrequent occurrence of signal events, extraordinary measures are taken to reduce background
interactons and extract the most informatio from data. An efficiensignal denoising algorithm
can improve energy resolutio...
The study of Majorana neutrinos is a hot research topic in the field of particle physics for exploring physics beyond the Standard Model. Neutrinoless double beta decay (NLDBD) is a rare nuclear decay process that can confirm the Majorana nature of neutrinos experimentally. The PandaX-III collaboration aims to build a globally competitive experiment with a hundred-kilogram target mass,...
Shenzhen Innovation Light-source Facility (SILF) is a newly proposed fourth-generation synchrotron light source in China. In the first phase, a high-flux undulator beamline for high-resolution hard X-ray spectroscopy and hard X-ray photoelectron spectroscopy, named as High-Resolution Hard X-ray Spectroscopy Beamline, will be designed and constructed. This beamline is equipped with a...
The invariant theory provides a systematic method to construct quantities that are invariant under group action in terms of model parameters. So far, it has a lot of applications in particle physics. In this talk, I will introduce the basic ingredients of invariant theory and Hilbert series. The application of invariant theory in neutrino physics, and particularly in describing leptonic CP...
Hyper-Kamiokande (HK) is a next-generation long-baseline neutrino experiment that aims to take data in 2027. The experiment will use the J-PARC neutrino beam, upgraded to 1.3 MW, followed by a suite of near detectors. The HK far detector is a 260 kt underground water Cherenkov detector, placed 2.5-degree off the central axis of the neutrino beam and 295 km from the target. The experiment is...
Due to finite masses and mixing, for neutrinos propagate in space-time, there is a transition between left- and right- handed neutrinos, termed chiral rotation, besides the usual oscillation governed by the Dirac equation. The probability of chiral rotation is suppressed by a factor $m^2/E^2$. For non-relativistic neutrinos, this effects can be significant. In matter, the equation of motion is...
深圳产业光源增材制造线站采用波荡器（Undulator）光源，利用其高亮度、小发射度的特点获得高通量密度的同步辐射光。光源采用18mm短周期波荡器利于实现高次谐波的引出，从而覆盖8~30keV的能量波段；通过的超长线设计，以实现样品点处毫米级光斑尺寸；光束线中设置有双平晶单色器（DCM）可以提供高能量分辨的单色光，从而为高质量的定量CT测量提供可能。深圳产业光源增材制造线站高速X射线成像及CT成像为主要研究方法，将服务于粤港澳地区的增材制造相关产业中的凝固机理、成型控制、成型性能评估等基础科学及应用基础问题，助力传统制造业从低端模仿向高端创新创造转型，为其向先进制造和智能制造进行产业升级提供技术支撑。
We present a search for the lepton flavor violating decay 𝐽/𝜓→𝑒𝜇 using 8.998×10^9 𝐽/𝜓 events collected with the BESIII detector at the BEPCII 𝑒+ 𝑒− storage ring. No excess of signal above background is observed; we therefore set an upper limit on the branching fraction of ℬ(𝐽/𝜓→𝑒𝜇)< 4.5×10^(−9) at the 90% confidence level. Improving the previous best result by a factor of more than 30, this...
Charmonium weak decay is allowed in the Standard Model but has never been observed. Using (10087±44)×106 𝐽/𝜓 events collected with the BESIII detector at the BEPCII 𝑒+𝑒− storage ring at the center-of-mass energy of √𝑠=3.097 GeV, we present a search for the charmonium rare semi-muonic decay 𝐽/𝜓→𝐷−𝜇+𝜈𝜇 and its charge conjugation (c.c.) mode. Since no significant signal above the background is...
To meet the requirements of testing materials during synthesis and reactions in petrochemical industry, we provide a method by combining the XAFS and TEM to obtain the local coordination structure, chemical composition, chemical valence state, microscopic morphology of samples at the same time
The standard hot Big Bang model predicts a thermal background of relic neutrinos with a present-day temperature of T = 1.95K. At 330 neutrinos per cubic centimetre, the shear abundance of these neutrinos means that they can exert measurable influences on the evolution of the Universe, and leave their imprints on the precision cosmological observables. In this talk, I discuss how precision...
The IceCube experiment is a Cherenkov detector instrumented over a cubic kilometer, deep under the South Pole ice. Its primary array enables the detection of high-energy neutrino emissions from astrophysical sources, while a more densely instrumented subdetector, called DeepCore, located at the bottom of the main array, focuses on the detection of neutrinos down to GeV energies, where...
BESIII has collected 2.93 and 7.33 fb^-1 of e+e- collision data samples at
3.773 and 4.128-4.226 GeV, which provide the largest dataset of DDbar and DsDs pairs in the world, respectively. In this talk, we will report the updated measurements of |Vcs| in Ds+->tau+ nu and the form factor studies in
Ds+->K+K- e+ nu and pi+pi- e+ nu. In addition, we will report the most
updated amplitude...
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for 0νββ decay that has been able to reach the one-tonne mass scale. The detector, located at the LNGS in Italy, consists of an array of 988 TeO2 crystals arranged in a compact cylindrical structure of 19 towers. CUORE began its first physics data run in 2017 at a base temperature of...
JUNO-TAO is a liquid scintillator antineutrino spectrometer being built as a satellite experiment within the Jiangmen Underground Neutrino Observatory (JUNO). The JUNO-TAO detector will be placed about 30 m from one of the twins EPR reactors of the Taishan nuclear power plant (Taishan, Guangdong Province, China). In the 90s of the 20th century, it was experimentally proved that antineutrino...
Detection of neutrinoless double-beta decay ($0\nu\beta\beta$) would be an evidence of Majorana nature of neutrino, which clue on the extremely light neutrino mass and the matter dominant universe.
The KamLAND-Zen experiment started a search for $0\nu\beta\beta$ of $^{136}$Xe nuclei in 2011 (KamLAND-Zen400). The experiment was upgraded in 2019 by double amount of xenon nuclei and a tenfold...
The next generation of neutrino telescopes, including Baikal-GVD, KM3NeT, P-ONE, TAMBO, IceCube-Gen2 and TRIDENT, will be able to determine the flavor of high-energy astrophysical neutrinos precisely. With the aid of future neutrino oscillation experiments --- in particular JUNO, DUNE, and Hyper-Kamiokande --- the regions of flavor composition at Earth that are allowed by neutrino...
We propose a novel kind of CP violation effect --- the double-mixing CP asymmetry --- in a type of cascade decays that involves at least two mixing neutral mesons in the decay chain. It is induced by the interference between different oscillation paths of the neutral mesons in the decay process. The double-mixing CP asymmetry has unique phenomenological value because it still exists in the...
Borexino is a neutrino experiment whose detector is hosted by LNGS of Italy. The detector uses organic liquid scintillator and thus geo-neutrinos above 1.8 MeV can be detected via inverse-beta-decay. On 2020 Januaray, Borexino published the updated results on geo-neutrinos using 3262.74 days of data between December 2007 and April 2019, and the exposure is twice of its previous results. Around...
Searching for the neutrinoless double beta decay (0𝜈𝛽𝛽) in experiment is now regarded as the topmost promising instrument to explore the nature of neutrinos. Many international collaborations search for this rare nuclear decay through different detector techniques. In China, the CDEX and PandaX experiments at the China Jinping Underground Laboratory (CJPL) have carried out the 0𝜈𝛽𝛽 search...
The discovery of the Higgs boson with a mass of 125 GeV completed the particle content predicted by the Standard Model (SM). Even though this model is well established and consistent with many measurements, it is not capable to solely explain some observations. Many extensions of the SM addressing such shortcomings have additional (neutral or charged) Higgs bosons. In some models, the Higgs...
If collapsars are sources for both high-energy (HE) neutrinos and r-process nuclei, the profuse low-energy antineutrinos from beta-decay of the newly synthesized nuclei can annihilate the HE neutrinos. Considering HE neutrinos produced at internal shocks induced by intermittent mildly-magnetized jets, we show that such annihilation suppresses the overall HE neutrino spectrum above 300 TeV and...
The decays of radioactive isotopes, uranium, thorium and potassium, inside the Earth generate a significant amount of radiogenic heat and contribute to the Earth’s heat budget. The abundance of these elements is a key parameter to reveal the planet’s geophysical activities. Geoneutrinos originated from these isotopes are unique probe to the composition, and thus, the amount of the radiogenic...
About 90% of stars end up as white dwarfs, and there should be about 10 billion white dwarfs in the Milky Way alone. It is well-known that a white dwarf reaching the Chandrasekhar limit of about 1.4 solar masses may undergo a thermonuclear explosion (type Ia supernova). However, it may also go through the Accretion-Induced Collapse (AIC) due to electron capture by neon and magnesium at its...
Searching for New Physics beyond the Standard Model is one of the most intriguing topics in modern physics, and many theoretical models predict new particles with masses well below the electroweak scale. The $BABAR$ experiment collected data at the energy of $\Upsilon(4S)$, suitable for discovering such new particles.This talk presents several recent searches for B Mesogenesis and dark sector...
Many theories beyond the Standard Model (BSM) have been proposed to address several of the Standard Model shortcomings, such as the origin of dark matter and neutrino masses, the fine-tuning of the Higgs Boson mass, or the observed pattern of masses and mixing angles in the quark and lepton sectors. Many of these BSM extensions predict new particles or interactions directly accessible at the...
Neutrinoless double-beta decay (0$\nu\beta\beta$) is a key process to address some of the major outstanding issues in particle physics, such as the lepton number conservation and the Majorana nature of the neutrino. Several efforts have taken place in the last decades in order to reach higher and higher sensitivity on its half-life. The next-generation of experiments aims at covering the...
NOvA is a long-baseline neutrino oscillation experiment which observes the intense NuMI beam of mostly $\nu_\mu$ (or $\bar{\nu}_\mu$) using two functionally identical detectors: the $\sim$1kt Near Detector (ND) 100m underground and 1km from the NuMI target at Fermilab, and the 14kt Far Detector (FD) 810km away on the surface at Ash River Falls in northern Minnesota. Both detectors are...
The Jiangmen Underground Neutrino Observatory (JUNO) located in Jiangmen, Guangdong, China is facilitated with a 20 kton liquid scintillator detector. One of the goals of the JUNO experiment is to detect geo-neutrinos produced by radioactive decay of U and Th, in order to provide constraints on the composition and radiogenic heat budget of Earth’s mantle.
To test different mantle composition...
With the large datasets on 𝑒+𝑒−-annihilation at the 𝐽/𝜓 and 𝜓(3686) resonances collected at the BESIII experiment, multi-dimensional analyses making use of polarization and entanglement can shed new light on the production and decay properties hyperon-antihyperon pairs. In a series of recent studies performed at BESIII, significant transverse polarization of the (anti)hyperons has been...
The BESIII experiment is a symmetric e+e- collider operating at c.m. energy from 2.0 to 4.95 GeV. With the world’s largest data set of J/psi (10 Billion), psi(2S) (2.6 Billion), and about 25 fb-1 scan data from 3.77 to
4.95 GeV, we are able to search various dark sectors produced in e+e- annihilation and meson decay processes. In this talk, we report the search for dark photon candidate in...
The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is a wide-field gamma-ray observatory located in Puebla, Mexico. The HAWC detector is composed of an array of water Cherenkov detectors (WCDs) that provides an instantaneous field of view of 2 sr and can observe 2/3 of the very high energy (VHE, 100 GeV < E < 100 TeV) gamma-ray sky every day because of its high duty cycle (>95%)....
Hyper-Kamiokande is a next-generation neutrino experiment that is under construction in Japan. It consists of a 260 kt underground water Cherenkov detector with a fiducial volume more than 8 times larger than that of Super-Kamiokande. It will serve both as a far detector of a long-baseline neutrino experiment and an observatory for astrophysical neutrinos and nucleon decays.
The long-baseline...
The speaker will report some selected CMS contributions to the exotic hadron studies, including Y(4140)--the first exotic hadron seen at LHC, X(3872) seen in B_s decay, X(3872) seen in PbPb data, the first observation of a new structure X(6600) in the JpsiJpsi invariant mass spectrum, and the evidence of another new structure X(7300) seen also in the JpsiJpsi channel.
Jinping Underground Laboratory has the advantage of the world's largest vertical rock overburden and the farthest distance to commercial nuclear power plants. The suppression of cosmic-ray muon-induced backgrounds and the neutrinos from the reactor can significantly improve the measurement accuracy of solar and geo neutrinos in the MeV energy region. The 0.5 to 15 MeV interval is an important...
Models with an axionlike particle (ALP) can provide an explanation for the discrepancy between experimental measurement of the muon anomalous-magnetic moment $(g-2)_\mu$ and the Standard Model prediction. This explanation relies on the couplings of the ALP to the muon and the photon. We also include more general couplings to the electroweak gauge bosons and incorporate them in the calculations...
Very-high-energy (VHE,100GeV-100TeV) and ultra-high-energy (UHE, >100TeV) gamma-ray observations play a special role in the era of multi-messenger astronomy. Large High Altitude Air Shower Observatory (LHAASO), located high on the edge of Tibetan Plateau at an average altitude of 4410 meters, is a dedicated gamma-ray hunter at energy range from sub-TeV to PeV. This hybrid array consists of...
Muon radiography has become an innovative and promising technique for internal density structure imaging, based on measuring the attenuation of cosmic-ray muons after penetrating the target. We have developed a portable muon detector which composed of plastic scintillator and SiPM. By using the detector, we performed several muon radiography experiment in China, such as imaging the overburden...
The DUNE experiment is a next-generation, long-baseline neutrino oscillation experiment currently being constructed at Fermilab and SURF. Its primary scientific goals are the definitive determination of the neutrino mass ordering, the definitive observation of charge-parity symmetry violation (CPV) for most of the true values of the charge-parity violating phase, $\delta_{CP}$, and precise...
The talk will report the recent studies of the production and decay of X(3872), and the discovery of new tetraquark and pentaquark candidates.
The low temperature detector based on phonon detection has the advantages of high energy resolution, low energy threshold and low background. This makes it become one of the most competitive detection techniques for searching for neutrino frontier physics, including neutrinoless double beta decay, coherent elastic neutrino-nucleus scattering, neutrino mass, etc. This talk will focus on...
The MicroBooNE experiment utilizes an 85-ton active volume liquid argon time projection chamber (LArTPC) neutrino detector. It can distinguish between photons and electron electromagnetic showers and select charged current electron neutrino and muon neutrino events with exceptional performance. In this talk, we will present results on MicroBooNE's investigation of the MiniBooNE Low Energy...
TMDPDFs and TMDWFs are important physical quantities characterizing the distributions of constituent momentum in the hadron, and reflect the non-perturbative internal structure of hadrons. In large-momentum effective theory (LaMET), the TMDWFs can be extracted from the first-principle simulation of a four-quark form factor and quasi-distributions. We provide a one-loop proof of TMD...
The BESIII experiment has collected 2.6B psi(2S) events and 10B J/psi events. The huge data sample provide an excellent chance to search for rare processes in charmonium and charm meson decays. In this talk, we report the recent search for J/psi->D^-e+nu_e, psi(2S)->Lambda_c anti-Sigma^-. In addition, LFV process J/psi->e tau/e mu & BNV/LNV process D^0->p e/n e, and the FCNC process D^0 ->...
This is an invited plenary highlight talk on CP violation by the Belle/Belle II collaboration. The contents will include the results from all related experiments, such as LHCb, BESIII, etc., not limited to Belle/Belle II.
This talk will focus on recent experimental results on Lepton Favor Universality (LFU) tests in the charm and beauty sectors. These results include studies on leptonic and semileptonic D decays from the BESIII experiment. The most recent LFU test results in semileptonic B decays, including R(D) and R(D*) from LHCb and R(Xe/μ) from BELLEII, will also be discussed. Finally, the talk will...
The concept of lepton flavor lies at the heart of the Standard Model (SM) of elementary particle physics. However, the fundamental symmetries underlying the flavor structures remain unexplained. In the SM, the transitions between generations of charged leptons, involving charged lepton flavor violation (CLFV), are highly suppressed. Nonetheless, numerous theories beyond the SM propose...
Fermilab announced a new experimental result for muon g-2 on April 27, 2021. The statistical uncertainty of the new result is similar to the previous BNL result and the central value is consistent. The combined value is 4.2 standard deviations away from the Standard Model prediction. An update from Fermilab with much more statistics is expected soon. For the Standard Model prediction, the two...
BESIII has collected 4.5 fb^-1 of e+e- collision data between 4.6 and 4.7 GeV. This unique data offers ideal opportunities to study Lambda_c+ decays. We will report the partial wave analysis of Lambda_c+ -> Lambda pi+ pi0 and the observations of Cabibbo-suppressed Decays Lambda_c+ decays, including Λ+c → nπ+ etc. In addition, we will report the form factor measurement in Lambda_c+ -> Lambda e+...
FASER is an experiment dedicated to searching for light, extremely weakly-interacting particles at LHC. Such particles may be produced in the very forward direction of the LHC's high-energy collisions and then decay to visible particles inside the FASER detector, which is placed 480 m downstream of the ATLAS interaction point. FASER also includes a sub-detector, FASERν, designed to detect...
With the completion of the Standard Model, there is no guarantee that new particles can be found at current or future colliders. Meanwhile, precision measurements of the Higgs and electroweak bosons at future lepton colliders offer a great opportunity for probing new physics beyond the Standard Model. The Standard Model Effective Field Theory (SMEFT) provides an ideal framework for a...
COHERENT collaboration is the first that observed Coherent elastic neutrino-nucleus scatter (CEvNS) events in 2017. A 14.6 kg CsI(Na) was placed 20 meters away from the Spallation Neutron Source (SNS) at the Oak Ridge National Laboratory (ORNL). The first measurement of CEvNS on Argon was then followed up in 2020. The 1.4 MW SNS pulsed proton beam provides a uniquely high-quality and...
Primordial black holes (PBHs) are a well-motivated dark matter (DM) candidate over a wide range of masses. Light, asteroid- mass primordial black holes could be detected using neutrinos produced via Hawking radiation. We discuss using neutrino to search for non-rotating PBHs with monochromatic mass distributions, spanning from 5 × 10^14 g to 10^16 g. We consider the null observations of...
We report a study of time variations of solar Neutrino flux using 5,804 live days of Super-Kamiokande data. The data used in this analysis were obtained from 31 May 1996 to 30 May 2018. The measured exact time of high-yield solar neutrino events for 22 calendar years of accumulated data allows for studying solar neutrino modulations with unprecedented precision. The measured time variation of...
The detection and cross section measurement of Coherent Elastic Neutrino-Nucleus Scattering (CEvNS) is vital for particle physics, astrophysics and nuclear physics. In 2017，the COHERNET collaboration reported the first observation of CEvNS signal. A new CEvNS detection experiment is under our schedule. Four pure CsI crystals, weight 3kg and coupled with two Photon Multiplier Tubes (PMTs) each,...
The Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider has been collecting the world’s highest-intensity collisions at the $\Upsilon$(4S) since 2019. A data set comparable in size to that of predecessor experiments, and collected with the new detector, enables unique or world-leading results. Examples include indirect searches for non-standard-model physics in...
The Sun is a high-energy gamma-ray and neutrino source due to cosmic rays interacting with the solar atmosphere. It is also a popular target for dark matter searches with high-energy neutrinos, as dark matter could be trapped and annihilate at the core of the Sun. However, from the gamma-ray observations with HAWC and Fermi, it is clear that the complex solar magnetic fields play an important...
In the Standard Model Effective Field Theory (SMEFT), operators involving
the top quark are generally difficult to probe, and can generate sizable loop contributions to the electroweak precision observables, measured by past and future lepton colliders. Could the high precision of the electroweak measurements compensate the loop suppression and provide competitive reaches on these operators?...
A precise and model-independent determination of the neutron distribution radius $R_{\rm n}$ and thus the neutron skin thickness $R_{\rm skin}$ of atomic nuclei is of fundamental importance in nuclear physics, particle physics and astrophysics but remains a big challenge in terrestrial labs. We argue that the nearby core-collapse supernova (CCSN) in our Galaxy may render a neutrino flux with...
T2K is a long baseline neutrino experiment which exploits a neutrino and antineutrino beam produced at the Japan Particle Accelerator Research Centre (J-PARC) to provide world-leading measurements of the parameters governing neutrino oscillation. Neutrino oscillations are measured by comparing neutrino rates and spectra at a near detector complex, located at J-PARC, and at the water-Cherenkov...
The heavy flavor rare decays allow exploring energy scales much higher than the ones directly accessible and present good chances to search for the beyond the Standard Model phenomena. Several observables, such as the branching fractions, the R values and the angular distribution parameters, are utilized to enhance the searching for BSM in the flavor rare decays, because of their sensitivities...
The coherent elastic neutrino-nucleus scattering (CEνNS) phenomenon, as predicted by the Standard Model, was initially observed in 2017 by the COHERENT collaboration. The detection of CEνNS, characterized by a significantly higher cross-section compared to the inverse beta decay (IBD), has introduced a novel and potent approach for reactor monitoring, nuclear structure exploration, neutrino...
We explore the semileptonic and nonleptonic decays of doubly heavy baryons $(\Omega_{cc}^ {(*) +}, \Omega_{bb}^ {(*)0}, \Omega_{bc}^ {(*)-}, \Omega_{bc}^{\prime0}) $ induced by the $s\to u$ transition. Hadronic form factors are parametrized by transition matrix elements and are calculated in the light front quark model. With the form factors, we make use of helicity amplitudes and analyze ...
The European Spallation Source neutrino Super Beam (ESSνSB) is a long-baseline neutrino project that will measure the CP-violation (CPV) in the leptonic sector at the second, rather than the first, $\nu_{μ}$ to $\nu_{e}$, oscillation maximum, where the sensitivity is $\sim$ 3 times higher. The use of the 5 MW proton beam of the ESS linac combined to a $\sim$ 3 cubic-km Water Cherenkov detector...
Many well motivated dark matter (DM) particle candidates can decay into detectable X-ray photons. We analyze eROSITA Final Equatorial Depth Survey (eFEDS) from eROSITA early data release to search for unexplained X-ray lines that could indicate DM signal. Having discovered no extra line, we set limits on DM decay rate in mass range between 2-18 keV, and constrain the parameter space of two DM...
Measurements of diboson production in association with two additional jets probe the quartic interactions between electroweak vector bosons predicted in the Standard Model. In this talk, recent results from the ATLAS Experiment are presented. The measurement of the production of electroweak same-sign W boson pairs in association with two jets, as well as the electroweak production of a Zy pair...
The neutrino-nucleus coherent scattering (CEνNS), as a low-energy channel of neutrino neutral current, was predicted right after the discovery of W, Z bosons. Not until its detection in 2017 using the high-energy neutrino flux from a neutron spallation source, CEνNS had been evading detection due to its very low energy deposition. CEνNS has the highest cross-section among all interaction...
We present the status of JPARC KOTO experiment to search for very rare $K_L$ decays to $\pi^0 \nu \overline{\nu}$ - an FCNC and direct $CP$ violating decay mode. KOTO has collected $K_L$ data yearly with 30 GeV high intensity proton beam on target at JPARC since 2015 until now with increasing beam power over this period up to 64.5 kW. The results from 2016-18 data published in 2021 ($ BR < 4.9...
Neutrinos elastically scattering off atomic electrons is a purely leptonic
process whose cross section can be precisely calculated in the standard
model. A measurement of this process can provide an in-situ constraint
to the absolute neutrino flux in an accelerator-based $\nu_\mu$ beam. NOvA is
a long-baseline neutrino experiment optimized to observe the oscillation
of $\nu_\mu$ to...
Low background germanium detectors with excellent energy resolution are advantageous to search for $^{76}$Ge neutrinoless double beta decay process. We proposed an experimental program, CDEX-300$\nu$, using $^{76}$Ge enriched broad energy germanium detectors at China Jinping Underground Laboratory (CJPL). In this talk, I will focus on the preconceptual design and plan of the CDEX-300$\nu$. The...
The CONUS experiment (COherent elastic NeUtrino nucleus Scattering) is searching for coherent elastic neutrino-nucleus scattering (CeνNS) with germanium detectors in Brokdorf Nuclear Power Plant (KBR, Germany). Four 1kg modules are placed 17m near the 3.9GW reactor core, monitoring an energy regime down to sub-keV with a background rate of ~10 per day per keV. In late 2022 the data taking was...
The forbidden dark matter cannot annihilate into a pair of heavier partners, either SM particles
or its partners in the dark sector, at the late stage of cosmological evolution by definition. We point
out the possibility of reactivating the forbidden annihilation channel around supermassive black
holes. Being attracted towards a black hole, the forbidden dark matter is significantly...
Measurements of diboson and triboson production at the LHC probe the electroweak gauge structure of the Standard Model for contributions from anomalous couplings. In this talk recent ATLAS results on the measurement W boson pairs are presented. The measurement improves in precision compared to previous measurements, and is compared to theoretical predictions from fixed order calculation and...
The NA62 experiment at CERN collected the world’s largest dataset of charged
kaon decays in 2016-2018, leading to the first measurement of the Branching
Fraction of the ultra-rare K+ → π+ν¯ν decay, based on 20 candidates. This
provides evidence for the very rare K+ → π+ν¯ν decay, observed with a significance
of 3.4σ. This measurement is also used to set limits on BR(K+ → π+X),
where X is...
Supersymmetric extensions of the standard model with a stable neutral lightest supersymmetric particle (LSP) provide a natural candidate for the dark matter of the Universe. Here we consider scenarios in which the LSP is a superWIMP, i.e., an extremely weakly interacting particle (e.g., a gravitino or axino), produced via the decay of a neutralino NLSP.
These scenarios can be probed at...
The experiment nuGeN is aimed at studying the properties of antineutrinos from the 3.1 GWth reactor of the Kalinin NPP (Udomlya, Russia). The experimental setup was installed under the reactor core of the KNPP on a special lifting platform at a distance of 11.1-12.2 m from center of the reactor core, which allows to operate an enormous flux of antineutrinos in (3.6 - 4.4)*10^13 (cm-2 sec-1). A...
In recent years, the study of lepton flavour universality (LFU) violation has garnered significant attention in the field of high energy physics. The ATLAS experiment at the Large Hadron Collider (LHC) has played a crucial role in unraveling the mysteries surrounding LFU and exploring the potential implications for our understanding of the fundamental particles and interactions. In this talk,...
LEGEND-200, the first phase of the Large Enriched Germanium Experiment for Neutrinoless double beta Decay, has recently started physics operations at the Gran Sasso National Laboratory. LEGEND will have unmatched discovery power in the field, potentially enabling the discovery that lepton number is not a fundamental symmetry in nature and that neutrinos are their own antiparticles. This talk...
LHCb measurements probe a region of phase space at low Bjorken-x where the other LHC experiments have limited sensitivity. This talk shall discuss measurements of the 13TeV and 5.02TeV Z boson production cross-sections to provide constraints on the parton distribution functions which describe the inner structure of the proton.
Electric dipole moments (EDMs) of elementary particles are powerful probes of physics beyond the Standard Model with CP violation. The reported discrepancy in the muon anomalous magnetic moment motivates us to explore to what extent new physics with CP violation to address the discrepancy is probed by ongoing and projected searches for the muon EDM. In this talk, we discuss two benchmark...
The discovery of neutrinoless double beta decay (0vbb) would firmly establish the Majorana nature of the neutrino mass and provide unequivocal evidence of lepton number non-conservation, a clear signature of physics beyond the Standard Model. The nEXO experiment is a monolithic cylindrical time projection chamber (TPC) with 5 tonnes of liquid xenon enriched to 90% in the isotope 136Xe aim to...
Coherent Elastic Neutrino-Nucleus Scattering, also known as CEvNS, describes the physical process of atomic nucleus scattering with neutrino as a whole, and the scattering cross section is approximately proportional to the square of atomic nucleus neutron number. The research on CEvNS has important scientific significance and application value. The RECODE project (Reactor neutrino COherent...
Gamma-ray bursts (GRBs) are proposed as origins of ultra-high-energy cosmic rays (UHECRs) since 1995. The non-detection of high-energy neutrinos from the observed GRBs by the IceCube observatory constrain the contriubtion of GRBs to cosmic rays. Lately, GRB 221009A was detected as the B.O.A.T. (“brightest of all time”) GRB with photons of energy up to $\sim$ 18 TeV. We compare timescales of...
The Deep Underground Neutrino Experiment (DUNE) is a next-generation long baseline neutrino experiment for studying neutrino properties with accelerator, atmospheric, and astrophysical sources. The primary physics goals of the DUNE experiment are to determine the neutrino mass ordering, search for new source of CP violation, test the unitarity of the neutrino mass and mixing matrix, search for...
Synchrotron X-ray powder diffraction (SXPD) is a powerful technique for advanced materials research, in particular to study structural changes under non-ambient or in operando conditions. It is therefore not surprising that most synchrotron radiation (SR) sources built SXPD instruments (beamlines) as user facilities. To be presented is the basic methodology supported by beamline examples from...
The Giant Radio Array for Neutrino Detection (GRAND) is a planned ground-based detector of ultra-high-energy cosmic rays (UHECRs), gamma rays and neutrinos. It is designed to consist of 20 independent sub-arrays of 10,000 radio antennas each, deployed over an area of 10,000 km$^2$ in radio-quiet locations. One of the primary goals of GRAND is to find the origin of UHECRs via detecting...
The COMET experiment at J-PARC aims to search for charged lepton flavor violation (cLFV) process with μN→eN decay. The physics goal of the experiment is to reach the single event sensitivity (S.E.S) at 2.6×10$^{-17}$, which is about four orders of magnitude better than the latest experimental limit. The experiment will produce a high-intensity muon beam with the new bunched slow extraction...
Neutrino oscillations as a phenomenon have been observed and measured over more than two decades, with datasets growing ever richer. As we enter a time of precision measurements, it is important to take stock of what new effects may be lurking in the data, waiting for us to discover them. In this talk, I will discuss such scenarios and how near-future experiments are well-suited for discovery.
We propose a UV completion model for pseudo-Nambu-Goldstone dark matter with a hidden U(1) gauge symmetry. Dark matter scattering off nucleons is highly suppressed by the UV scale and direct detection constraints can be easily evaded. The kinetic mixing between the hidden U(1) and the $\mathrm{U(1)_Y}$ gauge fields would lead to dark matter decays. The current bound on the dark matter lifetime...
We present the first full analytic results of next-to-next-to-leading order (NNLO) QCD corrections to the top-quark decay width Γ(t → W b) by calculating the imaginary part of three-loop top-quark self-energy diagrams. The results are all expressed in terms of harmonic polylogarithms and are valid in the whole region 0 ≤ mW ≤ mt . The expansions in the mW → 0 and mW → mt limits coincide with...
Quarks and gluons produced in high-energy particle collisions hadronize before their electric charge can be directly measured. However, information about the electric charge is embedded in the resulting collimated sprays of hadrons known as jets. One jet observable sensitive to the electric charge of quarks and gluons is the momentum-weighted charge sum constructed from charged-particle...
The ability of the Mu2e experiment to probe direct Charged Lepton Flavor Violation (CLFV) $\mu^+$ and $\pi^+$ decay modes is estimated. These direct modes complement the Mu2e indirect search for $\mu^-\rightarrow e^-$ conversion accomplished using proposed detector validation runs. The $\mu^+$ validation run operates at 50% magnetic field and reduced beam intensity, to observe the $e^+$...
I will review existing hints and constraints on light sterile neutrinos. I will then explain the primary reasons why these anomalous data sets cannot be simply interpreted as a 1 eV sterile neutrino due to constraints from other experimental probes, notably solar neutrinos and cosmological data sets. I will present a novel, simple model that evades many of these constraints by adding in one...
Located at the Gran Sasso underground laboratories, the XENONnT experiment is a dark matter direct detection experiment that employs a dual-phase liquid xenon time projection chamber with a 5.9-tonne liquid xenon target. Building on the infrastructure developed for XENON1T with several upgrades, the XENONnT experiment is currently acquiring data and pushing the frontiers of astroparticle...
DarkSide-20k represents the next stage of the direct detection dark matter search program based on argon as its target material within the Global Argon Dark Matter Collaboration (GADMC). The experiment is currently under construction at LNGS, Italy. The argon target provides powerful discrimination between the electron (background) and nuclear (signal) recoils in the form of pulse shape...
Mu3e is an experiment under construction at the Paul Serrer Institute dedicated to the search of the charged lepton flavor violating mu->eee decay at branching fractions of $10^{-16}$, which will be an improvement over the preceding SINDRUM experiment by four orders of magnitude. Furthermore, as the decay is heavily suppressed in the Standard Model, its observation would unambiguously indicate...
In this talk, I will discuss in detail the capabilities of the next-generation high-precision long-baseline
neutrino oscillation experiments DUNE and T2HK in isolation and combination to address the major
unknowns in the three-flavor neutrino oscillation paradigm. I will show how the possible
complementarity/synergy among the on-axis DUNE and off-axis T2HK experiments can enhance
the...
The discovery of a non-zero rate for a lepton flavor violating decay mode of the Higgs boson would definitely be an indication of New Physics. We review the prospects for such signal. After a general discussion we concentrate on Two Higgs Doublet Models and show that this scenario contains all the necessary ingredients to provide large flavor violating rates, in particular for Higgs boson...
The search for light dark matter (LDM) particles became possible in recent years mainly thanks to the progress on two different fronts. First, new detection channels were exploited such as the Migdal effect and LDM–electron scattering. Second, new detection techniques were implemented such as the ionization-only channel with a low threshold and argon depleted from the 39Ar β-emitter by...
LUX-ZEPLIN (LZ) is a direct dark matter detection experiment aiming to detect rare events resulting from the scattering of Weakly Interacting Massive Particles (WIMPs). It employs a dual-phase xenon time projection chamber (TPC) with an active mass of 7 tonnes (5.6 tonne fiducial), surrounded by an instrumented xenon skin and liquid scintillator active vetoes. I will give an overview of the LZ...
The measurement of reactor neutrinos from coherent elastic neutrino-nucleus scattering (CEνNS) experiments can be used to probe quenching factor and new physics. We demonstrate that the constraints to new physics by the recent reactor CEνNS experiment at Dresden-II are quite sensitive to the quenching factor at low recoil energies. We also show that a CEνNS experiment with an ultra-low energy...
Measurements of the branching ratios of $B \to D^{(*)}\tau\nu / B \to D^{(*)}\ell\nu$ by the BaBar, Belle, and LHCb collaborations consistently point towards an abundance of taus compared to channels with light leptons at the 3-4 sigma level. This $R(D^{(*)})$ anomaly could imply TeV scale new physics. In this contribution, I will first review several new physics interpretations of the...
As one of the hypothetical principles in the Standard Model (SM), lepton flavor universality (LFU) should be tested with a precision as high as possible such that the physics violating this principle can be fully examined. The run of $Z$ factory at a future $e^+e^−$ collider such as CEPC or FCC-$ee$ provides a great opportunity to perform this task because of the large statistics and high...
Effective field theories (EFTs) have recently undergone rapid developments due to the absence of any new discoveries experimentally. In light of the rich data from various low- and high-energy data now and in the near future, the Standard Model EFT (SMEFT) is adopted as a model-independent tool in searching for new physics indirectly by performing its global fit. While attention has largely...
Dark Matter (DM) is one of the most pressing questions in particle physics today: the evidence of DM's existence from astrophysics and cosmology is substantial, while particle physicists know nothing about DM. Direct detection experiments have hunted DM for more than four decades. However, the null results have been consistently concluded by a lot of experiments that implemented variant target...
I will discuss how to analyse neutrino experiments using an Effective Field Theory (EFT) framework. This approach makes possible to include generic non-standard effects in neutrino production and detection, and to study the interplay with non-neutrino experiments. We will discuss the connection with the traditional non-standard interactions (NSI) approach, and the application to specific...
In this study, we present a comprehensive analysis of the electroweak sphaleron formalism and its application to the electroweak phase transition (EWPT). We offer an equivalence proof for various sphaleron configurations and construct the previously unestablished high-dimensional $SU(2)$ sphaleron transformation matrix. Furthermore, we provide an in-depth examination of non-contractible loops...
The Fermilab Muon g-2 Experiment aims to search for evidence of new physics by measuring the anomalous magnetic moment of muons, represented by the quantity (g-2)/2. The experiment injects muons into a storage ring, where the precession frequency is measured to determine (g-2)/2.
The analysis of the experiment involves two main components: measuring the difference frequency (ωa) between the...
We consider a quark and lepton model explaining their masses, mixings, and CP violating phases, introducing modular $A_4$ and hidden gauged $U(1)$ symmetries. The hidden $U(1)$ brings us heavier Majorana fermions that are requested by chiral anomaly cancellations, and we work on a canonical seesaw scenario due to their neutral particles. Then, we discuss a scalar dark matter candidate that has...
We made global fits of the inert Higgs doublet model (IDM) in the light of collider and dark matter search limits and the requirement for a strongly first-order electroweak phase transition (EWPT). These show that there are still IDM parameter spaces compatible with the observational constraints considered. In particular, the data and theoretical requirements imposed favour the hypothesis for...
We scrutinize the hypothesis that gauge singlet fermions - sterile neutrinos - interact with Standard Model particles through the transition magnetic moment portal. These interactions lead to the production of sterile neutrinos in supernovae followed by their decay into photons and active neutrinos which can be detected at γ-ray telescopes and neutrino detectors, respectively. We find
that...
Utilizing powerful nuclear reactors as anti-neutrino sources, high mountains to provide ample shielding from cosmic rays in the vicinity, and functionally identical detectors with large target volume for near-far relative measurement, the Daya Bay Reactor Neutrino Experiment has achieved unprecedented precision in measuring the neutrino mixing angle $\theta_{13}$ and the neutrino mass squared...
The combination of early and late cosmology probes gives the tightest upper bound on neutrino masses to date. I will briefly review the physics behind the cosmological measurements of neutrino masses, and the state-of-the-art constraint on the sum of neutrino masses from the latest cosmological data of cosmic microwave background and the large-scale structure of the universe.
As our understanding of the six three-flavor neutrino oscillation parameters begins to fall into place, our ability to probe new physics modifications to oscillations will continue to increase in a variety of directions. I will provide a brief overview of the latest status of a variety of new physics scenarios including sterile neutrinos, unitarity violation, and non-standard neutrino interactions.
JUNO-TAO is a liquid scintillator antineutrino spectrometer being built as a satellite experiment within the Jiangmen Underground Neutrino Observatory (JUNO). The JUNO-TAO detector will be placed about 30 m from one of the twins EPR reactors of the Taishan nuclear power plant (Taishan, Guangdong Province, China). In the 90s of the 20th century, it was experimentally proved that antineutrino...
