Improved Measurement of the Branching Ratio
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 Rexpe/μ=[1.2344±0.0023(stat)±0.0019(syst)] x 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%.
- Authors:
- more »
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- PIENU Collaboration
- OSTI Identifier:
- 1210170
- Report Number(s):
- BNL-108222-2015-JA
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: PO-022; KA2201020; TRN: US1600770
- Grant/Contract Number:
- SC00112704
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 115; Journal Issue: 7; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; measurement; branching; ratio
Citation Formats
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., and Yamada, K. Improved Measurement of the π→eν Branching Ratio. United States: N. p., 2015.
Web. doi: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. United States. 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., and Yamada, K. 2015.
"Improved Measurement of the π→eν Branching Ratio". United States. https://doi.org/10.1103/PhysRevLett.115.071801. https://www.osti.gov/servlets/purl/1210170.
@article{osti_1210170,
title = {Improved Measurement of the π→eν Branching Ratio},
author = {Aguilar-Arevalo, A. and Aoki, M. and Blecher, M. and Britton, D. I. and Bryman, D. A. and vom Bruch, D. and Chen, S. and Comfort, J. and Ding, M. and Doria, L. and Cuen-Rochin, S. and Gumplinger, P. and Hussein, A. and Igarashi, Y. and Ito, S. and Kettell, S. H. and Kurchaninov, L. and Littenberg, L. S. and Malbrunot, C. and Mischke, R. E. and Numao, T. and Protopopescu, D. and Sher, A. and Sullivan, T. and Vavilov, D. and Yamada, K.},
abstractNote = {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)] x 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%.},
doi = {10.1103/PhysRevLett.115.071801},
url = {https://www.osti.gov/biblio/1210170},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 7,
volume = 115,
place = {United States},
year = {Sat Aug 01 00:00:00 EDT 2015},
month = {Sat Aug 01 00:00:00 EDT 2015}
}
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