Muon tomography has attracted significant attention in diverse application areas, yet it is currently limited by the low flux and wide energy spread of cosmic ray muons. To overcome these drawbacks, considerable efforts have been made, such as generating a mono-energetic, high-energy muon beam using accelerator facilities.
One potential accelerator facility is the High Intensity Heavy-Ion...
A high-repetition-rate pulsed muon source operating at approximately 50 kHz could improve the sensitivity of various particle physics and material science experiments involving muons. We proposed using the high-repetition-rate pulsed electron beam at the SHINE facility to generate a surface muon beam. Our simulation studies show that an 8 GeV, 100 pC charge pulsed electron beam striking a...
Fermilab has measured muon $g-2$ to unprecedented precision. The central value agrees with the previous BNL measurement. On the theory side, the main source of uncertainties are from the two hadronic contributions -- hadronic vacuum polarization (HVP) and hadronic light-by-light scattering (HLbL). Recent lattice QCD calculations have made a lot of contributions in determining these two...
The Muon g-2 Experiment at Fermilab measures the anomalous part of the muon magnetic dipole moment, a_{\mu}, and searches for a non-zero muon electric dipole moment (EDM). Both are excellent probes of new physics; precise measurements of a_{\mu} can help disentangle current tensions in the Standard Model (SM) prediction, and the predicted muon EDM is beyond current experimental reach. An EDM...
The muon anomalous magnetic moment (g−2)_µ and electric dipole moment are sensitive to new physics beyond the Standard Model (SM). There is a discrepancy between the experimental value of the (g−2)_µ and the SM prediction at more than 5σ level. We aim to measure (g−2)_µ with a precision of 450 parts per billion and to search for electric dipole moment with a sensitivity of 1.5×10^−21 e·cm in...
Generating a mono-energetic, high-energy muon beam using accelerator facilities can be very attractive for many purposes, for example, searching for muon related new physics beyond the Standard Model. One potential accelerator facility is the High Intensity Heavy-Ion Accelerator Facility (HIAF), which is currently under construction in Huizhou City, China. Considering the projectile energy and...
我们提出了一个新颖的暗物质探索实验：DREAMuS（利用先进缪子源研究暗物质），使用位于中国的强流重离子加速器装置（HIAF）提供的GeV级缪子束流开展暗物质研究。DREAMuS实验旨在搜寻一种与缪子有特定耦合的暗物质粒子，这类粒子通过带味破坏的重型Z玻色子进行相互作用。该实验将寻找含轻子味破坏的标准模型新物理，并为包括缪子反常磁矩在内的多种实验反常现象提供解释。实验信号特征表现为高横动量的电子，并伴随来自中微子与暗物质粒子的大缺失能量。
本报告将介绍DREAMuS实验的理论框架、模拟研究及预期探测灵敏度，突出其通过缪子相互作用研究暗物质及相关新物理现象的潜力。
This talk will report the development of muSR spectrometers for the Chinese muon facility.
Muons, which play a crucial role in both fundamental and applied physics, have traditionally been generated through proton accelerators or from cosmic rays. With the advent of ultra-short high-intensity lasers capable of accelerating electrons to GeV levels, it has become possible to generate muons in laser laboratories. In this work, we show the first proof of principle experiment for novel...
The muEDM experiment at the Paul Scherrer Institut (PSI) aims to measure the muon electric dipole moment (EDM) with unprecedented sensitivity, targeting σ(dμ)=6×10−23 e·cm, a three-order-of-magnitude improvement over the current limit established by the BNL muon g−2 experiment. Central to this effort is the muon trigger detector (TrigDet), positioned at the solenoid entrance,...
Electromagnetic systems are critical in the design of muon-based beamlines and detectors. This poster shows Positron Transport System (PTS) designed for Muonium-to-Antimuonium Conversion Experiment (MACE) and the beamline device for Accelerator Driven Sub-critical System (CiADS) muon beamline MuST. For MACE, PTS we designed realizes transmission, reconstruction of signal and background...
This work presents a novel detector design enabling muon scattering experiments at the High-energy FRagment Separator[1] (HFRS) at the High Intensity heavy-ion Accelerator Facility[2] (HIAF), offering new capabilities to probe dark matter[3], dark bosons, quantum entanglement phenomena[4], and the charged lepton flavor violation[5] (CLFV). Building upon the muon tomography detector from the...
宇宙线缪子成像作为一种新兴的探测技术手段，目前主要包括散射成像和透射成像两种主要方法。本报告将重点介绍我们在这两种成像方式中所采用的算法方面的一些创新性探索和实践经验。
The spontaneous conversion of muonium to antimuonium is one of the interesting charged lepton flavor violation phenomena offering a sensitive probe of potential new physics and serving as a tool to constrain the parameter space beyond the Standard Model. The Muonium-to-Antimuonium Conversion Experiment (MACE) is designed to utilize a high-intensity muon beam, a Michel electron magnetic...
The measurement of the muon anomalous magnetic moment depends on a precise measurement of the muon anomalous precession frequency and the magnetic field. For magnetic field measurement, as the field that muons experience cannot be directly measured, the multipole fitting interpolation method is generally employed. In recent years, integrating physical laws into machine learning has made...
Axion-like particles (ALPs) with lepton flavour violating (LFV) interactions are predicted within a wide range of well-motivated extensions of the Standard Model. The proposed μTRISTAN high-energy e-μ+ and μ+μ+ collider provides a good opportunity to explore flavour physics in the charged lepton sector. In this talk, we discuss the potential of μTRISTAN to probe ALP LFV couplings considering...
We present dark photon searches via the visible decay mode at fixed-target experiments such as DarkSHINE and MUonE.
In DarkSHINE, dark photons are produced through electron bremsstrahlung and they can be identified via displaced vertex signatures from decayed lepton pairs. Detailed studies with full vertex reconstruction are required to enable strong background suppression.
We also explore...
Firstly, we'd like to share a novel and cost-effective experiment proposal to probe the charged lepton flavor violation (CLFV) process mediated by an extra massive neutral gauge boson $Z'$ beyond the Standard Model, as a part of the Peking University Muon (PKMuon) Experiment. The considered process can be uniquely sensitive to specific CLFV parameter combinations, such as the coupling...
Muon-Induced X-ray Emission (MIXE) [1-4] is a non-destructive analytical technique that leverages negative muons to probe elemental and isotopic compositions by detecting characteristic muonic X-rays emitted during atomic cascades and gamma rays from nuclear capture processes. By controlling the muon beam momentum, MIXE enables depth-resolved analysis, spanning microns to centimeters, making...
人工缪子束流穿透性强，其发射的负缪子束流与靶材料相互作用后会产生特征光子，称缪致X射线，利用其到达灵敏探测器时间、位置及缪子束流信息，可用于对靶材料元素的位置反演。
A detailed simulation and 3D reconstruction of copper and skull are presented in this talk. Imaging performance is compared to that of Xrays tomography.
Cosmic ray muon imaging, as a non-invasive imaging modality, utilizes naturally occurring cosmic ray muons as penetrating probes to reconstruct the distribution of matter. A critical challenge in designing position-sensitive muon detectors lies in optimizing the trade-off among three key parameters: detection area, spatial resolution, and manufacturing cost. Owing to their proven feasibility...
The polarization is a key feature of muons. Not only does it affect background events in high-precision experiments such as JUNO, but it also plays an important role in cosmic ray studies. Understanding muon polarization can provide complementary information to constrain atmospheric neutrino flux modeling.
We have developed Cosmic-Ray Muon Spin Spectroscopy (CRmuSR), a scintillator detector,...
Cosmic ray muons, as important "natural probes," have been widely used in particle physics experiments. We have developed a cosmic ray telescope with an effective detection cross-section of one square meter to achieve high-precision tracking of high-energy cosmic ray muons. The instrument employs a modular design, innovatively combining a plastic scintillator strip with a layer of...
本研究致力于设计一种适用于矿脉勘探的钻井型缪子成像系统，旨在结合地质勘探技术与缪子成像技术，提升矿产资源勘探的精准性与高效性。研究探索并设计的钻井型缪子成像系统，适用于钻探手段，通过弧形塑料闪烁体与双端读出的楔形塑料闪烁体条耦合SiPM，探测系统直径不低于200 mm，长度不小于600 mm，位置分辨为厘米级；
The Muonium-to-Antimuonium Conversion Experiment (MACE) aims to search for the charged lepton flavor violation process at an unprecedented level. A significant challenge arises from cosmic-ray-muon-induced background in both the Phase-I and the complete experiment. To address this, a muon detection system with a high efficiency is required. In this work, we focus on a design of Cosmic Ray Veto...
The Muonium-to-Antimuonium Conversion Experiment (MACE) aims to probe charged lepton flavor violation (cLFV) through an advanced detector system. The MACE calorimeter system could satisfy the requirement in searching for lepton flavor violating $\mathrm{M}\to\gamma\gamma$ and $\mu\to e\gamma\gamma$ decay in the MACE Phase-I. With an inner tracking system comprising a Multigap Resistive Plate...
Modern particle detection systems increasingly rely on precise timing performance. This work presents the development of a scintillator Tiled Timing Counter (TTC) system optimized for the Muonium-to-Antimuonium Conversion Experiment (MACE). Our study introduces a simulation-guided optimization scheme and a prototype test with cosmic ray muons to validate the design concept. This study will...
广义相对论的时空背景由度规描述，仿照Dirac将Klein-Gordon方程开根号，这里将度规开根号得到对半度规几何。对半度规几何拥有度规结构还拥有U(4)伴丛结构，可基于自平行输运原理自然给出弯曲时空Pati-Salam模型。这个理论预言了X玻色子与Y玻色子等少量新物理。
