Test of exotic scalar and tensor couplings in K+→π0e+ν decay

Shimizu, S.; Horie, K.; M, Abe; Aoki, M.; Arai, I.; Asano, Y.; Baker, T.; Blecher, M.; Chapman, Michael; Depommier, P.; Grigorjev, M. P.; Hasinoff, M.; Huang, H.-C.; Igarashi, Y.; Ikeda, Tokihiro; Imazato, J.; Kang, J. H.; Khabibullin, M.; Khotjantsev, A.; Kudenko, Y.; Kuno, Y.; Lee, J.-M.; Lee, K.S.; Levchenko, A. S.; Lim, G. Y.; Macdonald, J. A.; Mindas, C.; Mineev, O.; Sekikawa, S.; Shimizu, Hirohiko M.; Shin, Y. H.; Shin, Yong Moon; Sim, K. S.; Suzuki, A.; Tashiro, T.; Watanabe, A.; Wright, D. H.; Yokoi, T.

doi:10.1016/s0370-2693(00)01235-1

Cited by 22 publications

(4 citation statements)

References 7 publications

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“…This was shown in Ref. [135] for the case of the then best available data in both the neutral decay channel, CPLEAR [148] and charged decay channel, KEK-PS E246 [149]. This is shown in Fig.…”

Section: K ℓ3mentioning

confidence: 56%

Chiral perturbation theory beyond one loop

Bijnens

2007

Progress in Particle and Nuclear Physics

124

107

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The existing Chiral Perturbation Theory (ChPT) calculations at order p 6 are reviewed. The principles of ChPT and how they are used are introduced. The main part is a review of the twoand three-flavour full two-loop calculations and their comparison with experiment. We restrict the discussion to the mesonic purely strong and semileptonic sector. The review concludes by mentioning the existing results in finite volume, finite temperature and partially quenched ChPT. Chiral Perturbation Theory Beyond One Loop AbstractThe existing Chiral Perturbation Theory (ChPT) calculations at order p 6 are reviewed. The principles of ChPT and how they are used are introduced. The main part is a review of the twoand three-flavour full two-loop calculations and their comparison with experiment. We restrict the discussion to the mesonic purely strong and semileptonic sector. The review concludes by mentioning the existing results in finite volume, finite temperature and partially quenched ChPT.

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Section: K ℓ3mentioning

confidence: 56%

Chiral perturbation theory beyond one loop

Bijnens

2007

Progress in Particle and Nuclear Physics

124

107

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“…The difference in the number of hits between these two counters is an asymmetry representing the transverse polarization P T of interest. 1 The matrix element (1.1) doesn't include explicitly any exotic terms, since our recent study of K + → π 0 e + ν (K + e3 ) decays shows that, first, scalar fS and tensor fT form factors are consistent with zero [2] and, second, there is no deviation from µ-e universality [3].…”

Section: Experimental Techniquementioning

confidence: 99%

New limit on T-violating parameters in kaon decays

Khabibullin¹,

Abe²,

Aliev³

et al. 2001

Proceedings of International Europhysics Conference on High Energy Physics — PoS(hep2001)

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A search for a T-violating transverse muon polarization (P T ) in K + → π 0 µ + ν decay was carried out in the experiment E246 at the KEK-PS. The Standard model (SM) predicts vanishing value of the polarization (< 10 −7 ), so an observation of non-zero P T at the current experimental sensitivity level would be a definite signature of new physics beyond SM. The preliminary result of the analysis of the 1996-1998 data is presented here: P T = (−3.3±3.7(stat)±0.9(syst))×10 −3 , which corresponds to the T-violation parameter Im(ξ) = (−0.9 ± 1.2(stat) ± 0.3(syst)) × 10 −2 . There is no evidence for T-violation in K µ3 at the current level of sensitivity. * Speaker.

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“…They gave the upper limit on the magnitude of interference between scalar S and tensor T couplings. Shimizu et al [13] determined the ratio of the strengths of scalar and tensor couplings to the standard vector coupling in K + → π 0 + e + + ν e decay at rest assuming the only lefthanded neutrinos for all interactions. Bodek et al at the PSI [14] looked for the evidence of the violation of time reversal invariance measuring T -odd transverse positron polarization in µ + -decay.…”

Section: Introductionmentioning

confidence: 99%

Right-handed Dirac neutrinos in ν e– scattering and azimuthal asymmetry in recoil electron event rates

2003

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In this paper a scenario with the participation of the exotic scalar S, tensor T and pseudoscalar P couplings of the right-handed neutrinos in addition to the standard vector V, axial A couplings of the left-handed neutrinos in the low-energy (νµe − ) and (νee − ) scattering processes is considered. Neutrinos are assumed to be massive Dirac fermions and to be polarized. Both reactions are studied at the level of the fourfermion point interaction. The main goal is to show that the physical consequence of the presence of the right-handed neutrinos is an appearance of the azimuthal asymmetry in the angular distribution of the recoil electrons caused by the non-vanishing interference terms between the standard and exotic couplings, proportional to the transverse neutrino polarization vector. The upper limits on the expected effect of this asymmetry for the low-energy neutrinos (Eν < 1 M eV ) are found. We also show that if the neutrino helicity rotation (νL → νR) in the solar magnetic field takes place, the similar effect of the azimuthal asymmetry of the recoil electrons scattered by the solar neutrinos should be observed. This effect would also come from the interference terms between the standard (V, A)L and exotic (S, T, P )R couplings. New-type neutrino detectors with good angular resolution could search for the azimuthal asymmetry in event number. PACS: 13.15.+g, 13.88.+e

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Test of exotic scalar and tensor couplings in K+→π0e+ν decay

Cited by 22 publications

References 7 publications

Chiral perturbation theory beyond one loop

Chiral perturbation theory beyond one loop

New limit on T-violating parameters in kaon decays

Right-handed Dirac neutrinos in ν e– scattering and azimuthal asymmetry in recoil electron event rates

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