Measurement of the muon decay parameter<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>δ</mml:mi></mml:math>

Gaponenko, A.; Bayes, R.; Davydov, Yu. I.; Depommier, P.; Doornbos, J.; Faszer, W.; Fujiwara, Masahiro; Gagliardi, C. A.; Gill, D. R.; Green, P.; Gumplinger, P.; Hasinoff, M.; Henderson, R.; Hu, J.; Jamieson, B.; Kitching, P.; Koetke, D. D.; Krushinsky, A. A.; Lachin, Yu.Yu.; Macdonald, J. A.; MacDonald, R.; Marshall, G. M.; Mathie, E. L.; Miasoedov, L.V.; Mischke, R. E.; Musser, J.; Nord, P. M.; Nozar, M.; Olchanski, K.; Olin, A.; Openshaw, R.; Porcelli, T. A.; Poutissou, J. M.; Poutissou, R.; Quraan, Maher A.; Rodning, N.; Selivanov, V. I.; Sheffer, Gabriel; Shin, B. K.; Sobratee, F.; Stanislaus, T. D. S.; Tacik, R.; Torokhov, V.; Tribble, R. E.; Vasiliev, M. A.; Wright, D.H.

doi:10.1103/physrevd.71.071101

Cited by 40 publications

(22 citation statements)

References 19 publications

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“…The endpoint fit function is a slope with an edge (f (x) = ax + b for x ≤ 1, and f (x) = 0 for x > 1) convoluted with a Gaussian σ. The parameters a, b, and σ all depend on cos θ [20]. The end point of the muon decay spectrum and sections of the 2-dimensional end point fit function for the bins within the fiducial region with the smallest upstream and downstream angles are shown in Fig.…”

Section: Discussionmentioning

confidence: 99%

Measurement ofPμξin polarized muon decay

Jamieson¹,

Bayes²,

Davydov³

et al. 2006

Phys. Rev. D

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The quantity P π µ ξ, where ξ is one of the muon decay parameters and P π µ is the degree of muon polarization in pion decay, has been measured. The value P π µ ξ = 1.0003±0.0006 (stat.)±0.0038 (syst.) was obtained. This result agrees with previous measurements but is over a factor of two more precise. It also agrees with the Standard Model prediction for P π µ ξ and thus leads to restrictions on left-right symmetric models.

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Section: Discussionmentioning

confidence: 99%

Measurement ofPμξin polarized muon decay

Jamieson¹,

Bayes²,

Davydov³

et al. 2006

Phys. Rev. D

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“…Initial and intermediate measurements of and have already been published [6][7][8]. This paper presents a detailed description of the final measurement of the and decay parameters by the TWIST Collaboration reported in [9].…”

Section: Introductionmentioning

confidence: 99%

Precision muon decay measurements and improved constraints on the weak interaction

Hillairet¹,

Bayes²,

Bueno³

et al. 2012

Phys. Rev. D

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The TWIST Collaboration has completed its measurement of the three muon decay parameters , , and P . This paper describes our determination of , which governs the shape of the overall momentum spectrum, and , which controls the momentum dependence of the parity-violating decay asymmetry. The results are ¼ 0:749 77 AE 0:000 12ðstatÞ AE 0:000 23ðsystÞ and ¼ 0:750 49 AE 0:000 21ðstatÞ AE 0:000 27ðsystÞ. These are consistent with the value of 3=4 given for both parameters in the standard model, and each is over a factor of 10 more precise than the measurements published prior to TWIST. Our final results on , , and P have been incorporated into a new global analysis of all available muon decay data, resulting in improved modelindependent constraints on the possible weak interactions of right-handed particles.

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“…This tension has led to the consideration of more complicated new physics scenarios. These include a keV fourth neutrino with decay [20][21][22][23][24], three and four neutrinos with CPT violation [25][26][27][28][29][30][31], fiveneutrino oscillation [32], quantum decoherence [31,33], Lorentz violation [30,34], sterile neutrinos in extra dimensions [35][36][37], neutrinos with varying mass [38][39][40], muon decay with lepton number violation [41][42][43], three twinneutrinos [44], neutrino-antineutrino oscillations [45], neutrino decay in the unparticle scenario [46], CP violation from neutral heavy leptons [47], and nonstandard interactions [48][49][50]. Here, we consider in detail the interplay of neutrino oscillation and neutrino decay in a 3 þ 1 sterile neutrino model.…”

Section: Introductionmentioning

confidence: 99%

Exploring a nonminimal sterile neutrino model involving decay at IceCube

et al. 2018

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We study the phenomenology of neutrino decay together with neutrino oscillations in the context of eV-scale sterile neutrinos. We review the formalism of visible neutrino decay in which one of the decay products is a neutrino that potentially can be observed. We apply the formalism developed for decay to the recent sterile neutrino search performed by IceCube with TeV neutrinos. We show that for a ν 4 lifetime τ 4 /m 4 ≲ 10 −16 eV −1 s, the interpretation of the high-energy IceCube analysis can be significantly changed.

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Measurement of the muon decay parameterδ

Cited by 40 publications

References 19 publications

Measurement ofPμξin polarized muon decay

Measurement ofPμξin polarized muon decay

Precision muon decay measurements and improved constraints on the weak interaction

Exploring a nonminimal sterile neutrino model involving decay at IceCube

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