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

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:
Report Number(s):
BNL-203426-2018-JAAM
Journal ID: ISSN 2470-0010; PRVDAQ
Grant/Contract Number:
SC0012704
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)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
PIENU Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; neutrinos; search; decay
OSTI Identifier:
1430843

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., 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.. 2018. "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}
}