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Title: Improved search for heavy neutrinos in the decay π e ν

Abstract

In this study, a search for massive neutrinos has been made in the decay π + → e +ν. No evidence was found for extra peaks in the positron energy spectrum indicative of pion decays involving massive neutrinos (π → e +ν h). Upper limits (90 % C.L.) on the neutrino mixing matrix element |U ei| 2 in the neutrino mass region 60–135 MeV/c 2 were set, which are an order of magnitude improvement over previous results.

Authors:
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Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
PIENU Collaboration
OSTI Identifier:
1430843
Report Number(s):
BNL-203426-2018-JAAM
Journal ID: ISSN 2470-0010; PRVDAQ; TRN: US1802354
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 97; Journal Issue: 7; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; neutrinos; search; decay

Citation Formats

Aguilar-Arevalo, A., Aoki, M., Blecher, M., Britton, D. I., vom Bruch, D., Bryman, D. A., Chen, S., Comfort, J., Cuen-Rochin, S., Doria, L., Gumplinger, P., Hussein, A., Igarashi, Y., Ito, S., Kettell, S., Kurchaninov, L., Littenberg, L. S., Malbrunot, C., Mischke, R. E., Numao, T., Protopopescu, D., Sher, A., Sullivan, T., and Vavilov, D. Improved search for heavy neutrinos in the decay π→eν. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.97.072012.
Aguilar-Arevalo, A., Aoki, M., Blecher, M., Britton, D. I., vom Bruch, D., Bryman, D. A., Chen, S., Comfort, J., Cuen-Rochin, S., Doria, L., Gumplinger, P., Hussein, A., Igarashi, Y., Ito, S., Kettell, S., Kurchaninov, L., Littenberg, L. S., Malbrunot, C., Mischke, R. E., Numao, T., Protopopescu, D., Sher, A., Sullivan, T., & Vavilov, D. Improved search for heavy neutrinos in the decay π→eν. United States. doi:10.1103/PhysRevD.97.072012.
Aguilar-Arevalo, A., Aoki, M., Blecher, M., Britton, D. I., vom Bruch, D., Bryman, D. A., Chen, S., Comfort, J., Cuen-Rochin, S., Doria, L., Gumplinger, P., Hussein, A., Igarashi, Y., Ito, S., Kettell, S., Kurchaninov, L., Littenberg, L. S., Malbrunot, C., Mischke, R. E., Numao, T., Protopopescu, D., Sher, A., Sullivan, T., and Vavilov, D. Tue . "Improved search for heavy neutrinos in the decay π→eν". United States. doi:10.1103/PhysRevD.97.072012. https://www.osti.gov/servlets/purl/1430843.
@article{osti_1430843,
title = {Improved search for heavy neutrinos in the decay π→eν},
author = {Aguilar-Arevalo, A. and Aoki, M. and Blecher, M. and Britton, D. I. and vom Bruch, D. and Bryman, D. A. and Chen, S. and Comfort, J. and Cuen-Rochin, S. and Doria, L. and Gumplinger, P. and Hussein, A. and Igarashi, Y. and Ito, S. and Kettell, S. 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.},
abstractNote = {In this study, a search for massive neutrinos has been made in the decay π+ → e+ν. No evidence was found for extra peaks in the positron energy spectrum indicative of pion decays involving massive neutrinos (π → e+νh). Upper limits (90 % C.L.) on the neutrino mixing matrix element |Uei|2 in the neutrino mass region 60–135 MeV/c2 were set, which are an order of magnitude improvement over previous results.},
doi = {10.1103/PhysRevD.97.072012},
journal = {Physical Review D},
number = 7,
volume = 97,
place = {United States},
year = {2018},
month = {4}
}

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Works referenced in this record:

High purity pion beam at TRIUMF
journal, October 2009

  • Aguilar-Arevalo, A.; Blecher, M.; Bryman, D. A.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 609, Issue 2-3
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Detector for measuring the <mml:math altimg="si0009.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msup><mml:mrow><mml:mi mathvariant="normal">π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:mo>→</mml:mo><mml:msup><mml:mrow><mml:mi mathvariant="normal">e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msub><mml:mrow><mml:mi mathvariant="normal">ν</mml:mi></mml:mrow><mml:mrow><mml:mi>e</mml:mi></mml:mrow></mml:msub></mml:math> branching fraction
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    Works referencing / citing this record:

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    journal, September 1986


    Radiative corrections to πl2 and Kl2 decays
    journal, October 1996


    High purity pion beam at TRIUMF
    journal, October 2009

    • Aguilar-Arevalo, A.; Blecher, M.; Bryman, D. A.
    • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 609, Issue 2-3
    • DOI: 10.1016/j.nima.2009.08.053

    Study of a large NaI(Tl) crystal
    journal, September 2010

    • Aguilar-Arevalo, A.; Aoki, M.; Blecher, M.
    • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 621, Issue 1-3
    • DOI: 10.1016/j.nima.2010.05.037

    Detector for measuring the <mml:math altimg="si0009.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msup><mml:mrow><mml:mi mathvariant="normal">π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:mo>→</mml:mo><mml:msup><mml:mrow><mml:mi mathvariant="normal">e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msub><mml:mrow><mml:mi mathvariant="normal">ν</mml:mi></mml:mrow><mml:mrow><mml:mi>e</mml:mi></mml:mrow></mml:msub></mml:math> branching fraction
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    • Aguilar-Arevalo, A. A.; Aoki, M.; Blecher, M.
    • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 791
    • DOI: 10.1016/j.nima.2015.04.004

    π/ Ke ν̄ e branching ratios to O ( e 2 p 4 ) in Chiral Perturbation Theory
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