Measurement of the pion branching ratio at TRIUMF

C. Malbrunot; A. A. Aguilar-Arevalo; M. Aoki; M. Blecher; D. I. Britton; D. A. Bryman; S. Chen; J. Comfort; M. Ding; L. Doria; P. Gumplinger; A. Hussein; Y. Igarashi; S. Ito; S. H. Kettell; Y. Kuno; L. Kurchaninov; L. Littenberg; T. Numao; A. Sher; T. Sullivan; D. Vavilov; M. Yoshida

doi:10.1063/1.3700618

Measurement of the pion branching ratio at TRIUMF

C. Malbrunot, A. A. Aguilar-Arevalo, M. Aoki, M. Blecher, D. I. Britton, D. A. Bryman, S. Chen, J. Comfort, M. Ding, L. Doria, P. Gumplinger, A. Hussein, Y. Igarashi, S. Ito, S. H. Kettell, Y. Kuno, L. Kurchaninov, L. Littenberg, T. Numao, A. SherT. Sullivan, D. Vavilov, M. Yoshida

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

Abstract

The branching ratio of pion decays, R=Γ(π ⁺→e ⁺ν _e+π ⁺→e ⁺ν _eγ)/Γ(π ⁺→μ ⁺ν _μ+π ⁺→μ ⁺ν _μγ is one of the most accurately calculated decay processes involving hadrons and has provided one of the most stringent tests of the hypothesis of electron-muon universality in weak interactions. The current experimental branching ratio R _exp=(1.230±0.004)×10 ^-4 is 40 times less precise than the theoretical prediction R _SM=1.2352(1)10 ^-4. The TRIUMF PIENU experiment aims at measuring the pion branching ratio with a precision improved by at least a factor five.

Original language	English
Title of host publication	19th Particles and Nuclei International Conference, PANIC11
Pages	564-566
Number of pages	3
DOIs	https://doi.org/10.1063/1.3700618
Publication status	Published - 2012
Externally published	Yes
Event	19th Particles and Nuclei International Conference, PANIC11 - Cambridge, MA, United States Duration: Jul 24 2011 → Jul 29 2011

Publication series

Name	AIP Conference Proceedings
Volume	1441
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	19th Particles and Nuclei International Conference, PANIC11
Country/Territory	United States
City	Cambridge, MA
Period	7/24/11 → 7/29/11

Keywords

Pion branching ratio
Standard Model test
universality

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.3700618

Cite this

Malbrunot, C., Aguilar-Arevalo, A. A., Aoki, M., Blecher, M., Britton, D. I., Bryman, D. A., Chen, S., Comfort, J., Ding, M., Doria, L., Gumplinger, P., Hussein, A., Igarashi, Y., Ito, S., Kettell, S. H., Kuno, Y., Kurchaninov, L., Littenberg, L., Numao, T., ... Yoshida, M. (2012). Measurement of the pion branching ratio at TRIUMF. In 19th Particles and Nuclei International Conference, PANIC11 (pp. 564-566). (AIP Conference Proceedings; Vol. 1441). https://doi.org/10.1063/1.3700618

Malbrunot, C, Aguilar-Arevalo, AA, Aoki, M, Blecher, M, Britton, DI, Bryman, DA, Chen, S, Comfort, J, Ding, M, Doria, L, Gumplinger, P, Hussein, A, Igarashi, Y, Ito, S, Kettell, SH, Kuno, Y, Kurchaninov, L, Littenberg, L, Numao, T, Sher, A, Sullivan, T, Vavilov, D & Yoshida, M 2012, Measurement of the pion branching ratio at TRIUMF. in 19th Particles and Nuclei International Conference, PANIC11. AIP Conference Proceedings, vol. 1441, pp. 564-566, 19th Particles and Nuclei International Conference, PANIC11, Cambridge, MA, United States, 7/24/11. https://doi.org/10.1063/1.3700618

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title = "Measurement of the pion branching ratio at TRIUMF",

abstract = "The branching ratio of pion decays, R=Γ(π +→e +ν e+π +→e +ν eγ)/Γ(π +→μ +ν μ+π +→μ +ν μγ is one of the most accurately calculated decay processes involving hadrons and has provided one of the most stringent tests of the hypothesis of electron-muon universality in weak interactions. The current experimental branching ratio R exp=(1.230±0.004)×10 -4 is 40 times less precise than the theoretical prediction R SM=1.2352(1)10 -4. The TRIUMF PIENU experiment aims at measuring the pion branching ratio with a precision improved by at least a factor five.",

keywords = "Pion branching ratio, Standard Model test, universality",

author = "C. Malbrunot and Aguilar-Arevalo, {A. A.} and M. Aoki and M. Blecher and Britton, {D. I.} and Bryman, {D. A.} and S. Chen and J. Comfort and M. Ding and L. Doria and P. Gumplinger and A. Hussein and Y. Igarashi and S. Ito and Kettell, {S. H.} and Y. Kuno and L. Kurchaninov and L. Littenberg and T. Numao and A. Sher and T. Sullivan and D. Vavilov and M. Yoshida",

year = "2012",

doi = "10.1063/1.3700618",

language = "English",

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series = "AIP Conference Proceedings",

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T1 - Measurement of the pion branching ratio at TRIUMF

AU - Malbrunot, C.

AU - Aguilar-Arevalo, A. A.

AU - Aoki, M.

AU - Blecher, M.

AU - Britton, D. I.

AU - Bryman, D. A.

AU - Chen, S.

AU - Comfort, J.

AU - Ding, M.

AU - Doria, L.

AU - Gumplinger, P.

AU - Hussein, A.

AU - Igarashi, Y.

AU - Ito, S.

AU - Kettell, S. H.

AU - Kuno, Y.

AU - Kurchaninov, L.

AU - Littenberg, L.

AU - Numao, T.

AU - Sher, A.

AU - Sullivan, T.

AU - Vavilov, D.

AU - Yoshida, M.

PY - 2012

Y1 - 2012

N2 - The branching ratio of pion decays, R=Γ(π +→e +ν e+π +→e +ν eγ)/Γ(π +→μ +ν μ+π +→μ +ν μγ is one of the most accurately calculated decay processes involving hadrons and has provided one of the most stringent tests of the hypothesis of electron-muon universality in weak interactions. The current experimental branching ratio R exp=(1.230±0.004)×10 -4 is 40 times less precise than the theoretical prediction R SM=1.2352(1)10 -4. The TRIUMF PIENU experiment aims at measuring the pion branching ratio with a precision improved by at least a factor five.

AB - The branching ratio of pion decays, R=Γ(π +→e +ν e+π +→e +ν eγ)/Γ(π +→μ +ν μ+π +→μ +ν μγ is one of the most accurately calculated decay processes involving hadrons and has provided one of the most stringent tests of the hypothesis of electron-muon universality in weak interactions. The current experimental branching ratio R exp=(1.230±0.004)×10 -4 is 40 times less precise than the theoretical prediction R SM=1.2352(1)10 -4. The TRIUMF PIENU experiment aims at measuring the pion branching ratio with a precision improved by at least a factor five.

KW - Pion branching ratio

KW - Standard Model test

KW - universality

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T3 - AIP Conference Proceedings

SP - 564

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BT - 19th Particles and Nuclei International Conference, PANIC11

T2 - 19th Particles and Nuclei International Conference, PANIC11

Y2 - 24 July 2011 through 29 July 2011

ER -

Measurement of the pion branching ratio at TRIUMF

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