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Improved Measurement of the π→eν Branching Ratio.
- Source :
-
Physical review letters [Phys Rev Lett] 2015 Aug 14; Vol. 115 (7), pp. 071801. Date of Electronic Publication: 2015 Aug 13. - Publication Year :
- 2015
-
Abstract
- A new measurement of the branching ratio R_{e/μ}=Γ(π^{+}→e^{+}ν+π^{+}→e^{+}νγ)/Γ(π^{+}→μ^{+}ν+π^{+}→μ^{+}νγ) resulted in R_{e/μ}^{exp}=[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%.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 115
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 26317713
- Full Text :
- https://doi.org/10.1103/PhysRevLett.115.071801