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; T. Numao; D. Protopopescu; A. Sher; D. Vavilov

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. MischkeT. Numao, D. Protopopescu, A. Sher, D. Vavilov

Research output: Contribution to journal › Conference article › peer-review

Abstract

The pion branching ratio, R_π = γ(π⁺→e⁺v_e+π⁺→e⁺v_eϒ) γ(π⁺→μ⁺, v_μ+π⁺→μ⁺v^μϒ) 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 language	English
Journal	Proceedings of Science
Volume	Part F128555
Publication status	Published - 2016
Event	13th International Conference on Heavy Quarks and Leptons, HQL 2016 - Blacksburg, United States Duration: May 22 2016 → May 27 2016

ASJC Scopus subject areas

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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., ... Vavilov, D. (2016). Initial Results from the PIENU experiment. Proceedings of Science, Part F128555.

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 2016, 'Initial Results from the PIENU experiment', Proceedings of Science, vol. Part F128555.

@article{fc6224e44d6a4d99a8511aca2dfeb571,

title = "Initial Results from the PIENU experiment",

abstract = "The pion branching ratio, Rπ = γ(π+→e+ve+π+→e+veϒ) γ(π+→μ+, vμ+π+→μ+vμϒ) 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.",

author = "T. Sullivan and A. Aguilar-Arevalo and M. Aoki and M. Blecher and Britton, {D. I.} and Bryman, {D. A.} and {Vom Bruch}, D. and S. Chen and J. Comfort and S. Cuen-Rochin and L. Doria and P. Gumplinger and A. Hussein and Y. Igarashi and S. Ito and Kettell, {S. H.} and L. Kurchaninov and Littenberg, {L. S.} and C. Malbrunot and Mischke, {R. E.} and T. Numao and D. Protopopescu and A. Sher and D. Vavilov",

note = "Funding Information: This work was supported by the National Sciences and Engineering Research Council and TRIUMF through a contribution from the National Research Council of Canada, and by the Research Fund for the Doctoral Program of Higher Education of China, by CONACYT doctoral fellowship from Mexico, and by JSPS KAKENHI Grant numbers 18540274, 213450059, 24224006 in Japan. We are grateful to Brookhaven National Laboratory for the loan of the crystals, and to the TRIUMF operations, detector, electronics, and DAQ groups for their engineering and technical support.; 13th International Conference on Heavy Quarks and Leptons, HQL 2016 ; Conference date: 22-05-2016 Through 27-05-2016",

year = "2016",

language = "English",

volume = "Part F128555",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

}

TY - JOUR

T1 - Initial Results from the PIENU experiment

AU - Sullivan, T.

AU - Aguilar-Arevalo, A.

AU - Aoki, M.

AU - Blecher, M.

AU - Britton, D. I.

AU - Bryman, D. A.

AU - Vom Bruch, D.

AU - Chen, S.

AU - Comfort, J.

AU - Cuen-Rochin, S.

AU - Doria, L.

AU - Gumplinger, P.

AU - Hussein, A.

AU - Igarashi, Y.

AU - Ito, S.

AU - Kettell, S. H.

AU - Kurchaninov, L.

AU - Littenberg, L. S.

AU - Malbrunot, C.

AU - Mischke, R. E.

AU - Numao, T.

AU - Protopopescu, D.

AU - Sher, A.

AU - Vavilov, D.

N1 - Funding Information: This work was supported by the National Sciences and Engineering Research Council and TRIUMF through a contribution from the National Research Council of Canada, and by the Research Fund for the Doctoral Program of Higher Education of China, by CONACYT doctoral fellowship from Mexico, and by JSPS KAKENHI Grant numbers 18540274, 213450059, 24224006 in Japan. We are grateful to Brookhaven National Laboratory for the loan of the crystals, and to the TRIUMF operations, detector, electronics, and DAQ groups for their engineering and technical support.

PY - 2016

Y1 - 2016

N2 - The pion branching ratio, Rπ = γ(π+→e+ve+π+→e+veϒ) γ(π+→μ+, vμ+π+→μ+vμϒ) 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.

AB - The pion branching ratio, Rπ = γ(π+→e+ve+π+→e+veϒ) γ(π+→μ+, vμ+π+→μ+vμϒ) 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.

UR - http://www.scopus.com/inward/record.url?scp=85026376138&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85026376138&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:85026376138

SN - 1824-8039

VL - Part F128555

JO - Proceedings of Science

JF - Proceedings of Science

T2 - 13th International Conference on Heavy Quarks and Leptons, HQL 2016

Y2 - 22 May 2016 through 27 May 2016

ER -

Initial Results from the PIENU experiment

Abstract

ASJC Scopus subject areas

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