Improved Measurement of the π → eν Branching Ratio

A. Aguilar-Arevalo; M. Aoki; M. Blecher; D. I. Britton; D. A. Bryman; D. Vom Bruch; S. Chen; J. Comfort; M. Ding; L. Doria; S. Cuen-Rochin; P. Gumplinger; A. Hussein; Y. Igarashi; S. Ito; S. H. Kettell; L. Kurchaninov; L. S. Littenberg; C. Malbrunot; R. E. Mischke; T. Numao; D. Protopopescu; A. Sher; T. Sullivan; D. Vavilov; K. Yamada

doi:10.1103/PhysRevLett.115.071801

Improved Measurement of the π → eν Branching Ratio

A. Aguilar-Arevalo, M. Aoki, M. Blecher, D. I. Britton, D. A. Bryman, D. Vom Bruch, S. Chen, J. Comfort, M. Ding, L. Doria, S. Cuen-Rochin, P. Gumplinger, A. Hussein, Y. Igarashi, S. Ito, S. H. Kettell, L. Kurchaninov, L. S. Littenberg, C. Malbrunot, R. E. MischkeT. Numao, D. Protopopescu, A. Sher, T. Sullivan, D. Vavilov, K. Yamada

Physics

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84 Scopus citations

Abstract

A new measurement of the branching ratio Re/μ=Γ(π+→e+ν+π+→e+νγ)/Γ(π+→μ+ν+π+→μ+νγ) resulted in Re/μexp=[1.2344±0.0023(stat)±0.0019(syst)]×10-4. This is in agreement with the standard model prediction and improves the test of electron-muon universality to the level of 0.1%.

Original language	English (US)
Article number	071801
Journal	Physical Review Letters
Volume	115
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.115.071801
State	Published - Aug 13 2015

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.115.071801

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Aguilar-Arevalo, A., Aoki, M., Blecher, M., Britton, D. I., Bryman, D. A., Vom Bruch, D., Chen, S., Comfort, J., Ding, M., Doria, L., Cuen-Rochin, S., Gumplinger, P., Hussein, A., Igarashi, Y., Ito, S., Kettell, S. H., Kurchaninov, L., Littenberg, L. S., Malbrunot, C., ... Yamada, K. (2015). Improved Measurement of the π → eν Branching Ratio. Physical Review Letters, 115(7), Article 071801. https://doi.org/10.1103/PhysRevLett.115.071801

Aguilar-Arevalo, A, Aoki, M, Blecher, M, Britton, DI, Bryman, DA, Vom Bruch, D, Chen, S, Comfort, J, Ding, M, Doria, L, Cuen-Rochin, S, Gumplinger, P, Hussein, A, Igarashi, Y, Ito, S, Kettell, SH, Kurchaninov, L, Littenberg, LS, Malbrunot, C, Mischke, RE, Numao, T, Protopopescu, D, Sher, A, Sullivan, T, Vavilov, D & Yamada, K 2015, 'Improved Measurement of the π → eν Branching Ratio', Physical Review Letters, vol. 115, no. 7, 071801. https://doi.org/10.1103/PhysRevLett.115.071801

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abstract = "A new measurement of the branching ratio Re/μ=Γ(π+→e+ν+π+→e+νγ)/Γ(π+→μ+ν+π+→μ+νγ) resulted in Re/μexp=[1.2344±0.0023(stat)±0.0019(syst)]×10-4. This is in agreement with the standard model prediction and improves the test of electron-muon universality to the level of 0.1%.",

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AU - Aoki, M.

AU - Blecher, M.

AU - Britton, D. I.

AU - Bryman, D. A.

AU - Vom Bruch, D.

AU - Chen, S.

AU - Comfort, J.

AU - Ding, M.

AU - Doria, L.

AU - Cuen-Rochin, S.

AU - Gumplinger, P.

AU - Hussein, A.

AU - Igarashi, Y.

AU - Ito, S.

AU - Kettell, S. H.

AU - Kurchaninov, L.

AU - Littenberg, L. S.

AU - Malbrunot, C.

AU - Mischke, R. E.

AU - Numao, T.

AU - Protopopescu, D.

AU - Sher, A.

AU - Sullivan, T.

AU - Vavilov, D.

AU - Yamada, K.

PY - 2015/8/13

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AB - A new measurement of the branching ratio Re/μ=Γ(π+→e+ν+π+→e+νγ)/Γ(π+→μ+ν+π+→μ+νγ) resulted in Re/μexp=[1.2344±0.0023(stat)±0.0019(syst)]×10-4. This is in agreement with the standard model prediction and improves the test of electron-muon universality to the level of 0.1%.

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Improved Measurement of the π → eν Branching Ratio

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