SliT: A Strip-Sensor Readout Chip With Subnanosecond Time Walk for the J-PARC Muon <i>g</i> − 2/EDM Experiment

Kishishita, Tetsuichi; Sato, Y.; Fujita, Y.; Hamada, Eitaro; Mibe, T.; Nagasawa, T.; Shirabe, S.; Shoji, M.; Suehara, Taikan; Tanaka, M.; Tojo, J.; Tsutumi, Yuki; Yamanaka, T.; Yoshioka, Tamaki

doi:10.1109/tns.2020.3012924

Cited by 7 publications

(2 citation statements)

References 12 publications

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“…The decay positron detector is required to be highly segmented and operate in a field of 3 T. To satisfy these requirements, the silicon strip detectors are radially placed in the detection volume to efficiently detect the circular track of the positrons. The final version of the front-end ASIC was developed for the detector referred to as SliT [13,14] and delivered at the end of March 2021.…”

Section: Pos(nufact2021)139mentioning

confidence: 99%

Muon g-2/EDM experiment at J-PARC

Otani¹

2022

Proceedings of the 22nd International Workshop on Neutrinos From Accelerators — PoS(NuFact2021)

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The recent measurement of the muon anomalous magnetic moment, 𝑎 𝜇 = (𝑔 𝜇 − 2)/2, with a precision of 0.46 ppm at the Fermilab National Accelerator Laboratory (FNAL) confirmed the anomaly observed at the Brookhaven National Laboratory (BNL) from more than a decade ago. The value of this anomaly between the measurements and the Standard Model (SM) prediction has been reported to be 4.2 standard deviations. Though this may indicate the existence of new physics beyond the SM, it should be verified through other measurements. The J-PARC experiment aims to measure 𝑎 𝜇 and the electric dipole moment (EDM) in a completely different way from the BNL and FNAL experiments, using a low-emittance muon beam realized through the acceleration of the thermal muons. This paper reports the current status of each experimental component. *** The 22nd International Workshop on Neutrinos from Accelerators (NuFact2021) ***

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Section: Pos(nufact2021)139mentioning

confidence: 99%

Muon g-2/EDM experiment at J-PARC

Otani¹

2022

Proceedings of the 22nd International Workshop on Neutrinos From Accelerators — PoS(NuFact2021)

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“…The paired electron in the muonium is knocked out by a laser, and thermal muon (3 keV/c) is generated. After acceleration to 300 MeV/c, the muon beam has an extremely low emittance such that it can be injected and stored in a high precision compact storage magnet [20,21], where the time dependence of the positrons from the muon decay is measured for the measurement of the anomalous spin precession [22,23].…”

Section: Muon Linac For the J-parc E34 Experimentsmentioning

confidence: 99%

First muon acceleration and muon linear accelerator for measuring the muon anomalous magnetic moment and electric dipole moment

Otani

2022

Preprint

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Muon acceleration using a radio-frequency accelerator was recently demonstrated for the first time. Measurement of the muon anomalous magnetic moment and electric dipole moment at Japan Proton Accelerator Research Complex is the first experiment using accelerated muon beams, and construction will begin soon. The radio-frequency accelerator used in the experiment and the first muon acceleration are described in this paper.

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Unified framework for B-anomalies, muon g − 2 and neutrino masses

Babu

Dev²,

Jana

et al. 2021

J. High Energ. Phys.

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We present a model of radiative neutrino masses which also resolves anomalies reported in B-meson decays, $$ {R}_{D^{\left(\ast \right)}} $$ R D ∗ and $$ {R}_{K^{\left(\ast \right)}} $$ R K ∗ , as well as in muon g − 2 measurement, ∆aμ. Neutrino masses arise in the model through loop diagrams involving TeV-scale leptoquark (LQ) scalars R2 and S3. Fits to neutrino oscillation parameters are obtained satisfying all flavor constraints which also explain the anomalies in $$ {R}_{D^{\left(\ast \right)}} $$ R D ∗ , $$ {R}_{K^{\left(\ast \right)}} $$ R K ∗ and ∆aμ within 1 σ. An isospin-3/2 Higgs quadruplet plays a crucial role in generating neutrino masses; we point out that the doubly-charged scalar contained therein can be produced in the decays of the S3 LQ, which enhances its reach to 1.1 (6.2) TeV at $$ \sqrt{s} $$ s = 14 TeV high-luminosity LHC ($$ \sqrt{s} $$ s = 100 TeV FCC-hh). We also present flavor-dependent upper limits on the Yukawa couplings of the LQs to the first two family fermions, arising from non-resonant dilepton (pp → ℓ+ℓ−) processes mediated by t-channel LQ exchange, which for 1 TeV LQ mass, are found to be in the range (0.15 − 0.36). These limits preclude any explanation of $$ {R}_{D^{\left(\ast \right)}} $$ R D ∗ through LQ-mediated B-meson decays involving νe or νμ in the final state. We also find that the same Yukawa couplings responsible for the chirally-enhanced contribution to ∆aμ give rise to new contributions to the SM Higgs decays to muon and tau pairs, with the modifications to the corresponding branching ratios being at (2–6)% level, which could be tested at future hadron colliders, such as HL-LHC and FCC-hh.

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SliT: A Strip-Sensor Readout Chip With Subnanosecond Time Walk for the J-PARC Muon g − 2/EDM Experiment

Cited by 7 publications

References 12 publications

Muon g-2/EDM experiment at J-PARC

Muon g-2/EDM experiment at J-PARC

First muon acceleration and muon linear accelerator for measuring the muon anomalous magnetic moment and electric dipole moment

Unified framework for B-anomalies, muon g − 2 and neutrino masses

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