Search for the rare decays π+→μ+νμνν¯ and π+→e+νeνν¯

Aguilar-Arevalo, A. et al. (2020) Search for the rare decays π+→μ+νμνν¯ and π+→e+νeνν¯. Physical Review D, 102, 012001. (doi: 10.1103/PhysRevD.102.012001)

Abstract

The rare pion decays π + → μ + ν μ ν ¯ ν and π + → e + ν e ν ¯ ν are allowed in the Standard Model but highly suppressed. These decays were searched for using data from the PIENU experiment. A first result for Γ ( π + → μ + ν μ ν ¯ ν ) / Γ ( π + → μ + ν μ ) < 8.6 × 10 − 6 and an improved measurement Γ ( π + → e + ν e ν ¯ ν ) / Γ ( π + → μ + ν μ ) < 1.6 × 10 − 7 were obtained.

• Item Type: Articles
• Additional Information: (PIENU Collaboration).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Britton, Professor David and Protopopescu, Dr Dan
• Authors: 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., Gorbunov, D., and Kalashnikov, D.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review D
• Publisher: American Physical Society
• ISSN: 2470-0010
• ISSN (Online): 1550-2368
• First Published: First published in Physical Review D 102:012001
• Publisher Policy: Reproduced under a Creative Commons licence