Improved measurement of the π → eν branching ratio

Aguilar-Arevalo, A. et al. (2015) Improved measurement of the π → eν branching ratio. Physical Review Letters, 115(7), 071801. (doi: 10.1103/PhysRevLett.115.071801)

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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 Rexpe/μ=[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%.

Item Type:Articles (Letter)
Glasgow Author(s) Enlighten ID:Protopopescu, Dr Dan and Britton, Professor David
Authors: 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., Hussain, 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., and Yamada, K.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Research Group:Particle Physics Experimental
Journal Name:Physical Review Letters
Journal Abbr.:PRL
Publisher:American Physical Society
ISSN (Online):1079-7114
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