Initial results from the PIENU experiment

T. Sullivan, A. Aguilar-Arevalo, M. Aoki, M. Blecher, D. I. Britton, D. A. Bryman, D. vom Bruch, S. Chen, J. Comfort, S. Cuen-Rochin, L. Doria, P. Gumplinger, A. Hussein, Y. Igarashi, S. Ito, S. H. Kettell, L. Kurchaninov, L. S. Littenberg, C. Malbrunot, R. E. Mischke & 4 others T. Numao, D. Protopopescu, A. Sher, D. Vavilov

Research output: Contribution to journalArticle

Abstract

The pion branching ratio, (Formula Presented.), provides a sensitive test of lepton universality and constraints on many new physics scenarios. The theoretical uncertainty on the Standard Model prediction of Rπ is 0.02 %, a factor of twenty smaller than the experimental uncertainty. The analysis of a subset of data taken by the PIENU experiment will be presented. The result, Rπ = (1.2344 ± 0.0023(stat) ± 0.0019(syst)) ⋅ 10−4 [1], is consistent with the Standard Model prediction and represents a 0.1 % constraint on lepton non-universality.

Original languageEnglish
Article number3
JournalHyperfine Interactions
Volume238
Issue number1
DOIs
Publication statusPublished - Nov 1 2017
Externally publishedYes

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leptons
predictions
set theory
pions
Physics
Experiments
physics
Uncertainty

Keywords

  • Electroweak physics
  • Lepton Universality
  • Pion decay
  • Precision measurements

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Sullivan, T., Aguilar-Arevalo, A., Aoki, M., Blecher, M., Britton, D. I., Bryman, D. A., ... Vavilov, D. (2017). Initial results from the PIENU experiment. Hyperfine Interactions, 238(1), [3]. https://doi.org/10.1007/s10751-016-1367-5

Initial results from the PIENU experiment. / Sullivan, T.; Aguilar-Arevalo, A.; Aoki, M.; Blecher, M.; Britton, D. I.; Bryman, D. A.; vom Bruch, D.; Chen, S.; Comfort, J.; Cuen-Rochin, S.; Doria, L.; 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.; Vavilov, D.

In: Hyperfine Interactions, Vol. 238, No. 1, 3, 01.11.2017.

Research output: Contribution to journalArticle

Sullivan, T, Aguilar-Arevalo, A, Aoki, M, Blecher, M, Britton, DI, Bryman, DA, vom Bruch, D, Chen, S, Comfort, J, Cuen-Rochin, S, Doria, L, Gumplinger, P, Hussein, A, Igarashi, Y, Ito, S, Kettell, SH, Kurchaninov, L, Littenberg, LS, Malbrunot, C, Mischke, RE, Numao, T, Protopopescu, D, Sher, A & Vavilov, D 2017, 'Initial results from the PIENU experiment', Hyperfine Interactions, vol. 238, no. 1, 3. https://doi.org/10.1007/s10751-016-1367-5
Sullivan T, Aguilar-Arevalo A, Aoki M, Blecher M, Britton DI, Bryman DA et al. Initial results from the PIENU experiment. Hyperfine Interactions. 2017 Nov 1;238(1). 3. https://doi.org/10.1007/s10751-016-1367-5
Sullivan, T. ; Aguilar-Arevalo, A. ; Aoki, M. ; Blecher, M. ; Britton, D. I. ; Bryman, D. A. ; vom Bruch, D. ; Chen, S. ; Comfort, J. ; Cuen-Rochin, S. ; Doria, L. ; 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. ; Vavilov, D. / Initial results from the PIENU experiment. In: Hyperfine Interactions. 2017 ; Vol. 238, No. 1.
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