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

Research output: Contribution to journalArticle

23 Citations (Scopus)

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 languageEnglish (US)
Article number071801
JournalPhysical Review Letters
Volume115
Issue number7
DOIs
StatePublished - Aug 13 2015

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muons
predictions
electrons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Aguilar-Arevalo, A., Aoki, M., Blecher, M., Britton, D. I., Bryman, D. A., Vom Bruch, D., ... Yamada, K. (2015). Improved Measurement of the π → eν Branching Ratio. Physical Review Letters, 115(7), [071801]. https://doi.org/10.1103/PhysRevLett.115.071801

Improved Measurement of the π → eν Branching Ratio. / 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.; Mischke, R. E.; Numao, T.; Protopopescu, D.; Sher, A.; Sullivan, T.; Vavilov, D.; Yamada, K.

In: Physical Review Letters, Vol. 115, No. 7, 071801, 13.08.2015.

Research output: Contribution to journalArticle

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
Aguilar-Arevalo A, Aoki M, Blecher M, Britton DI, Bryman DA, Vom Bruch D et al. Improved Measurement of the π → eν Branching Ratio. Physical Review Letters. 2015 Aug 13;115(7). 071801. https://doi.org/10.1103/PhysRevLett.115.071801
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. ; Mischke, R. E. ; Numao, T. ; Protopopescu, D. ; Sher, A. ; Sullivan, T. ; Vavilov, D. ; Yamada, K. / Improved Measurement of the π → eν Branching Ratio. In: Physical Review Letters. 2015 ; Vol. 115, No. 7.
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