Presentation materials
The Fermilab Muon g-2 experiment aims to measure the magnetic anomaly of the muon at the precision level of 140 ppb. The data model to extract the anomalous precession frequency is subjected to various beam dynamics corrections, contributing significantly to the systematics of the extracted frequency. These beam dynamics corrections were estimated by monte-carlo simulations, which often are...
Muon plays an essential role in both fundamental physics research and applied sciences. And the high quality of muon beam is the key to realizing research and application. A muon beam is typically produced in a proton accelerator complex through the proton-on-target process. Recently, other types of particles, such as high-energy electrons, gamma rays, and laser beams, have been proposed to...
The Run1 result of the Fermilab muon g-2 experiment have shown a 4.2 standard deviation between the experimental measurement and theoretical prediction of $a_{\mu}$, strongly indicating a new physics signal.
The experiment already accumulated 21x data compared to the BNL experiment. The J-PARC muon g-2 experiment will collect ~3.5x statistics compared to Fermilab. It can be expected that,...
Longitudinally polarized Vector Boson Scattering (VBS) process provides us with a perfect probe to precisely measure electroweak observables and Higgs coupling as massive vector bosons have longitudinally polarized components originating from the Higgs mechanism. A TeV-scaled muon collider that would effectively be a “high-luminosity weak boson collider”, has great potential to measure VBS...
In this project, we proposed a feasibility study of muon polarization measurement using a self-designed detector to monitor the muon beam's polarization in J-PARC. The detector utilizes the asymmetric angular distribution of positrons decayed from polarized muons to measure polarization indirectly. Monte-Carlo simulation is applied to optimize the structure of the detector and estimate its...
Muography is believed to have a wide range of applications especially in the cross-disciplinary area as it can probe the internal composition of objects in a non-destructive way. We designed a cosmic muon tracking detector MuGrid using plastic scintillators with a novel construction. Preliminary progress of the MuGrid detector and its demonstrator are shown in this poster.
Signs of charged lepton flavor violation (cLFV) processes directly indicate the existence of new physics beyond the standard model. The COMET experiment is located at the Japan High Current Proton Accelerator Center (J-PARC), and its goal is to find the charged lepton flavor violation process μN→eN with an accuracy of more than 10-17. In order to obtain high-precision experimental results, it...
Here I present our recent proposal for connecting neutrino and energy frontiers by exploiting collimated muon beams for neutrino oscillation. As know, neutrino oscillation is one the most important problems beyond standard model physics. Its observations enable us to infer that neutrinos have masses, although tiny. Another crucial problem within neutrino physics is the violation of Charge and...
The Muon g-2 experiment at Fermilab aims to achieve an unprecedented precision of 140 ppb in measuring the muon's anomalous magnetic moment. This high-precision experiment necessitates a thorough examination of factors that could potentially bias the fitted anomalous precession frequency, omega_a, including the multi-positron pileup effect. During Run-1, we observed biases up to 100s of ppb...
In this project's hardware phase, we have designed and developed a detector to measure the polarization of atmospheric muons. The detector consists of scintillator bars read out by silicon photomultipliers (SiPMs) to detect muons as well as their decay electrons and positrons. The SiPM signals are processed and stored using a high-performance CAEN DT5702 front-end digitizer board. Through data...
The first phase of the muEDM experiment at Paul Scherrer Institute (PSI), Switzerland, aims to probe the muon electric dipole moment (EDM) using the frozen-spin technique in a compact storage ring, at a sensitivity of 3×10-21 e⋅cm. A fast entrance detector is expected to work in concert with a magnetic pulse generator to kick muons to the desired orbit. At the same time, the...
Dear organizing committee,
I will be representing our group to introduce our recent progress in the form of a poster presentation. Our work is focused on revealing the origin of neutrino masses through the Type II and Type III Seesaw mechanism at high-energy muon colliders.Here are the related papers we published on this work
[https://arxiv.org/abs/2301.07274][2] and...
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 $(10087\pm44)\times{10}^6$ $J/\psi$ events collected with the BESIII detector at the BEPCII $e^+e^-$ storage ring at the center-of-mass energy of $\sqrt s=3.097\ \rm{GeV}$, we present a search for the charmonium rare semi-muonic decay $J/\psi\rightarrow D^-\mu^+\nu_\mu$ and its charge conjugation ($c.c.$)...
Exchanging a $Z^\prime$ gauge boson is a favored mechanism to solve the muon $(g-2)_\mu$ anomaly. Among such models the $Z^\prime$
from $U(1)_{L_\mu - L_\tau}$ gauge group has been extensively studied. In this model the same interaction addressing $(g-2)_\mu$, leads to an enhanced muon neutrino trident (MNT) process $\nu_\mu N \to \nu_\mu \mu \bar \mu N$ constraining the $Z^\prime$
mass...
