Search for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>T</mml:mi></mml:math>-violating transverse muon polarization in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:msup><mml:mi>μ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mi>ν</mml:mi></mml:math>decay

M, Abe; Aliev, M.; Anisimovsky, V. V.; Aoki, M.; Asano, Y.; Baker, T.; Blecher, M.; Depommier, P.; Hasinoff, M.; Horie, K.; Igarashi, Y.; Imazato, J.; Ivashkin, A.; Khabibullin, M.; Khotjantsev, A.; Kudenko, Y.; Kuno, Y.; Lee, K. S.; Levchenko, A. S.; Lim, G. Y.; Macdonald, J. A.; Mineev, O.; Okorokova, N.; Rangacharyulu, C.; Shimizu, S.; Shin, Y. H.; Shin, Yong Moon; Sim, K. S.; Yershov, N.; Yokoi, T.

doi:10.1103/physrevd.73.072005

Cited by 27 publications

(10 citation statements)

References 64 publications

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“…In K + decay, namely, K + → µ + νγ, the transverse muon polarization is studied, and the expected SM correlation is small [159,160] with respect to that possible in models of new physics [161,159]. Existing experimental studies are consistent with no T-violation in this and related processes [162,163], but new results of greater sensitivity are expected from TREK at J-PARC [164,165]. In ordinary beta-decay, a T-odd correlation is possible only if the initial state is polarized, or if the final-state polarization of one of the particles is observed.…”

Section: T-odd Correlationsmentioning

confidence: 99%

Beta decays and non-standard interactions in the LHC era

Cirigliano

Gardner

Holstein

2013

Progress in Particle and Nuclear Physics

189

269

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We consider the role of precision measurements of beta decays and light meson semi-leptonic decays in probing physics beyond the Standard Model in the LHC era. We describe all low-energy charged-current processes within and beyond the Standard Model using an effective field theory framework. We first discuss the theoretical hadronic input which in these precision tests plays a crucial role in setting the baseline for new physics searches. We then review the current and upcoming constraints on the various non-standard operators from the study of decay rates, spectra, and correlations in a broad array of light-quark systems. We finally discuss the interplay with LHC searches, both within models and in an effective theory approach. Our discussion illustrates the independent yet complementary nature of precision beta decay measurements as probes of new physics, showing them to be of continuing importance throughout the LHC era.

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Section: T-odd Correlationsmentioning

confidence: 99%

Beta decays and non-standard interactions in the LHC era

Cirigliano

Gardner

Holstein

2013

Progress in Particle and Nuclear Physics

189

269

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“…However, none of such experiments has observed T violation to date despite their excellent sensitivity. In another class of experiments, a T-odd operator is constructed out of final state observables in a decay process, such as the weak decay K + → π 0 µ + ν studied by the KEK-E246 experiment [24] in which the muon polarization transverse to the decay plane (P T = P K · (p π × p µ )/|p π × p µ |) was determined as an observable whose non-zero 3 mean value would manifest T violation. However, neither this measurement nor similar studies using decays of polarized 8 Li nuclei [25] and of free neutrons [26] have observed significant mean values of T-odd final state observables.…”

Section: Status and Strategies Of T Symmetry Testingmentioning

confidence: 99%

Feasibility Study of the Time Reversal Symmetry Tests in Decay of Metastable Positronium Atoms with the J-PET Detector

Gajos

Curceanu

Czerwiński

et al. 2018

Advances in High Energy Physics

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This article reports on the feasibility of testing of the symmetry under reversal in time in a purely leptonic system constituted by positronium atoms using the J-PET detector. The present state of T symmetry tests is discussed with an emphasis on the scarcely explored sector of leptonic systems. Two possible strategies of searching for manifestations of T violation in non-vanishing angular correlations of final state observables in the decays of metastable triplet states of positronium available with J-PET are proposed and discussed. Results of a pilot measurement with J-PET and assessment of its performance in reconstruction of three-photon decays are shown along with an analysis of its impact on the sensitivity of the detector for the determination of T -violation sensitive observables.

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“…Experiment E06 aims to improve the limit on the magnitude of the T -odd transverse muon polarization, P T , decays set by KEK experiment E246 [24] by a factor of 20. The muon polarization is particularly useful for searches of T -violation effects from non-SM physics as it vanishes in the Standard Model at the tree level and T -odd contributions from final-state interactions are very small, < 10 −5 [25].…”

Section: Transverse Muon Polarization Inmentioning

confidence: 99%

Searches for New Physics with the TREK Detector

Strauch¹

2015

Proceedings of XIIth International Conference on Heavy Quarks &Amp; Leptons 2014 — PoS(HQL2014)

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Experiment E36 at the Japan Proton Accelerator Research Complex (J-PARC) will study the decay of stopped kaons to search for new physics beyond the Standard Model. In particular, the experiment aims to provide the most stringent test of lepton universality to date in a measurement of the ratio of the K e2 and K µ2 decay widths, and will simultaneously search for light new particles, such as a heavy sterile neutrino or a dark photon. The experimental setup is based on the upgraded detector of KEK experiment E246 and includes a large-acceptance toroidal spectrometer for tracking charged particles with high resolution, combined with a photon calorimeter with large solid angle. The current status of the upcoming experiment and the planned measurements will be presented.

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Search forT-violating transverse muon polarization in theK+→π0μ+νdecay

Cited by 27 publications

References 64 publications

Beta decays and non-standard interactions in the LHC era

Beta decays and non-standard interactions in the LHC era

Feasibility Study of the Time Reversal Symmetry Tests in Decay of Metastable Positronium Atoms with the J-PET Detector

Searches for New Physics with the TREK Detector

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