Conveners
Parallel 3: HF/HI/QCD 1
- Zaochen Ye ()
Parallel 3: HF/HI/QCD 2
- YAXIAN MAO (IOPP, CCNU, Wuhan China)
- Yaxian Mao (Central China Normal University)
Parallel 3: HF/HI/QCD 3
- 齐烨 寿 (复旦大学)
Parallel 3: HF/HI/QCD 4
- Peilian Li (UCAS)
Parallel 3: HF/HI/QCD 5
- Kai Liu (兰州大学)
Parallel 3: HF/HI/QCD 6
- Shanzhen Chen (高能所（IHEP, CAS）)
- Shanzhen Chen (IHEP, CAS)
- Shanzhen Chen (IHEP, CAS)
Description
Tecent meeting Link: https://meeting.tencent.com/dm/n9KUmmoFkibj
Meeting ID: 988-2475-9282
会议主题：CLHCP2025 parrellel 3: HF/HI/QCD
会议时间：2025/10/30 14:00-20:00 (GMT+08:00) 中国标准时间 - 北京
重复周期：2025/10/30-2025/11/02 14:00-20:00, 每天
点击链接入会，或添加至会议列表：
https://meeting.tencent.com/dm/n9KUmmoFkibj
腾讯会议：988-2475-9282
手机一键拨号入会
+8675536550000,98824759282 (中国大陆)
根据您的位置拨号
+86 (0)755 36550000 (中国大陆)
复制该信息，打开手机腾讯会议即可参与
Multiple Parton Interactions (MPI) represent an essential feature of hadron–hadron collisions, adding significant richness to the event structure observed in high-energy physics. These processes occur when several partons from each colliding hadron undergo interactions within the same collision. Among the MPI mechanisms, Double Parton Scattering (DPS) stands out as the most straightforward...
本分析在核子对撞质心能量$\sqrt{s_{\textrm{NN}}}=5.36$ TeV下，对铅-铅（$Pb+Pb$）超擦边碰撞（UPC）中相干$J/\psi\to\mu^+ \mu^-$产生过程的测量。该测量基于LHC于在2023年采集、积分亮度为$76.5~\text{$\mu$$b$}^{-1}$的数据样本。分析采用了基于ATLAS跃迁辐射探测器的专用径迹敏感触发器来筛选$J/\psi$候选事例。由于感兴趣的缪子横动量范围使得标准的缪子重建与识别算法无法被使用，本分析直接依据内部探测器的缪子径迹来重建双缪子不变质量。我们测量了微分截面随$J/\psi$快度的变化，并将其与理论预言进行了比较。此外，在将结果外推至质心能量$\sqrt{s_{\textrm{NN}}}=5.02$...
Quarkonium production serves as a vital testing ground for quantum chromodynamics (QCD), offering critical insights into both perturbative and nonperturbative dynamics.In the nonrelativistic QCD (NRQCD) factorization framework, inclusive production cross sections of quarkonia are expressed as products of perturbatively calculable short-distance coefficients (SDCs) and nonperturbative...
ALICE, heavy flavor, spin polarization, femtoscopy, momentum correlations
In heavy-ion collisions, high-$p_{\rm T}$ partons traverse the hot and dense QCD medium, losing energy through induced gluon radiation and elastic scattering. This leads to modifications of jet structure compared to jets produced in vacuum. Measurements of the properties of the medium generated in Pb--Pb collisions at the LHC require reference measurements from more elementary pp and p--Pb...
Heavy quarks (charm and beauty) are useful probes for investigating the properties of the quark-gluon plasma (QGP) generated in ultra-relativistic heavy-ion collisions. Their participation in the collective motion of the medium can be assessed by measuring the charm-hadron elliptic-flow coefficient , originating from the initial-state spatial asymmetry in non-central heavy-ion collisions....
Particle correlations are powerful tools for studying quantum chromodynamics in hadron collisions. In heavy-ion collisions, azimuthal angular correlations probe collective phenomena in hot, dense, nuclear media, such as QGP. The LHCb experiment has the ability to study particle correlations in high-energy hadron collisions at forward rapidity, complementing the results from other experiments....
The interplay between the chiral anomaly and strong magnetic or vortical fields generated in off-central heavy-ion collisions is theorized to produce anomalous chiral effects in the quark–gluon plasma, such as the Chiral Magnetic Effect (CME) and the Chiral Vortical Effect (CVE). These effects have been actively studied by several experiments for over a decade as they could shed light on the...
In non-central heavy-ion collisions, the system’s global angular momentum and local vorticity can induce particle polarization. In particular, polarization along the beam direction may arise from asymmetries in the transverse velocity fields associated with elliptic flow.
In this study, we investigate the polarization of Λ and anti-Λ hyperons using ALICE Run 2 and Run 3 data. Since the...
The measurement of momentum correlations of identical pions serves as a fundamental tool for probing the space-time properties of a particle-emitting source created in high-energy collisions. Recent experimental results have shown that in pp collisions, the size of the one-dimensional primordial source depends on the transverse mass (mT) of the hadron pairs, following a common scaling behavior...
The study of the nucleon–nucleon (NN), hyperon–nucleon (YN) and hyperon–hyperon (YY) interactions is very important in understanding strong interactions, heavy-ion-collisions and neutron stars. Because of their unstable nature, it is hard to extract interactions between like N-$\Xi$or N-$\Omega$, and high energy collisions offer us a chance to further knowledge of those interactions by...
This talk will show recent highlights from ATLAS heavy flavor physics group, such as precise lifetime measurements of B mesons, lifetime from rare decay modes, and the all-charm tetraquark state study.
The study of vector meson photoproduction in ultraperipheral collisions (UPCs) offers a powerful probe of gluon dynamics in heavy nuclei. In UPCs, photons can interact with the nucleus coherently (involving the entire nucleus) or incoherently (with individual constituents). While coherent processes provide insight into the average gluon density, incoherent photoproduction is uniquely sensitive...
Quantum Chromodynamics (QCD) is characterized by a phenomenon known as color confinement. When quarks are produced at high-energy colliders like the Large Hadron Collider (LHC), they evolve into observable hadrons through a process called hadronization. In the context of QCD, heavy-flavour production is calculated as a convolution of three independent: the PDFs of the incoming protons, the...
The CMS experiment reports the observation of three structures in the 𝐽/𝜓𝐽/𝜓→𝜇+𝜇−𝜇+𝜇− channel — 𝑋(6600), 𝑋(6900), and 𝑋(7100) — each with a significance well above 5𝜎, confirming and extending the earlier Run 2 results. Strong interference effects among them, also above 5𝜎, indicate they share the same quantum numbers. A complementary search in the 𝐽/𝜓𝜓(2𝑆) channel reveals two structures...
The results of the first study of CP violation in the charm sector at the CMS experiment are presented. The analysis is based on the proton-proton collision data with the center-of-mass energy of $\sqrt{s} = 13$ TeV. The measured CP violation parameter is $A_{CP} (D^{0} \to K^{0}{S}K^{0}{S}) = (6.2 \pm 3.1(\text{stat.}) \pm 0.2(\text{syst.})\pm 0.8(A_{CP} (D^{0} \to K^{0}_{S}\pi^{+}\pi^{-}))...
Motivated by the recent CPV observation, we investigate the CPV of b-baryon charmless four body decays under the U-spin symmetry. However, we find that only U-spin symmetry cannot provide effective predictions, particularly for $\Lambda_b$ decays. For giving more useful predictions, we also give a simple dynamic analysis. By counting the power($\lambda=\sqrt{\frac{\Lambda_{QCD}}{m_b}}$) of...
A search for the charmless baryonic decay $B^+\to \bar{\Lambda} p\bar{p}p$ is performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 5.4 $\rm{fb}^{-1}$. The branching fraction for this decay is measured for the first time relative to that of the topologically similar decay $B^+\to J/\psi K^+$, with $J/\psi \to \bar{\Lambda} p...
A search for the rare decay $B^+\to\bar{\Lambda} p\mu^+\mu^-$ is performed using proton-proton collision data recorded by the LHCb experiment at a centre-of-mass energy of $\sqrt{s}= 13$ TeV, corresponding to an integrated luminosity of 5.4 fb$^{-1}$. An excess of events is found with respect to the background-only expectation, with a signal significance of 3.5 standard deviations, in the...
A study of the charmless baryonic decays $B^0_{(s)} \to K^0 p \bar{p}$ is reported using $9~\mathrm{fb}^{-1}$ of LHCb data at 7, 8, and 13 TeV. The decay $B^0_s \to K^0 p \bar{p}$ is observed for the first time with a branching fraction of $(9.14 \pm 1.69 \pm 0.90 \pm 0.33 \pm 0.20)\times 10^{-7}$ and a significance of $5.6\sigma$. For $B^0 \to K^0 p \bar{p}$, the branching fraction is...
The first observation of CP violation in the baryon sector was made in the decay $\Lambda_b^0 \to p K^- \pi^+ \pi^-$. In addition, the first evidence of CP violation in beauty baryon decays to charmonium was obtained. In this talk, I will present the analyses of these two decays, discussing the methodology, results, and their implications.
Charmless B-meson decays into two vector mesons, B → VV, serve as a powerful probe for the dynamics of weak and strong interactions through their angular distributions. This report will introduce recent LHCb results on B → VV decays, including:
- First observation of CP violation and measurement of polarization in B+ → ρ(770)0 K*(892)+ decays
- Measurement of the branching fractions...
CP violation plays a crucial role in accounting for the matter–antimatter imbalance observed in the Universe. This talk presents measurements of branching fractions and CP asymmetries in the decays $\Lambda_b^0(\Xi_b^0)\to pK_{\mathrm S}^0h^-$, where $h^-$ denotes either a pion or a kaon, using proton–proton collision data collected by the LHCb experiment, corresponding to an integrated...
A search for heavy resonances decaying into a Higgs or a Z boson and a photon, with the Higgs or Z bosons decaying to a pair of bottom quarks ($b\bar{b}$) is presented. The analysis uses proton-proton collision data at $\sqrt{s}$ = 13 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 138 $fb^{-1}$. The analyzed events contain a photon and a massive, large-radius...
