Search for three body pion decays π+→l+νX

Aguilar-Arevalo, A. et al. (2021) Search for three body pion decays π+→l+νX. Physical Review D, 103, 052006. (doi: 10.1103/PhysRevD.103.052006)

Abstract

The three body pion decays π + → l + ν X ( l = e , μ ) , where X is a weakly interacting neutral boson, were searched for using the full data set from the PIENU experiment. An improved limit on Γ ( π + → e + ν X ) / Γ ( π + → μ + ν μ ) in the mass range 0 < m X < 120     MeV / c 2 and a first result for Γ ( π + → μ + ν X ) / Γ ( π + → μ + ν μ ) in the region 0 < m X < 33.9     MeV / c 2 were obtained. The Majoron-neutrino coupling model was also constrained using the current experimental result of the π + → e + ν e ( γ ) branching ratio.

• 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., and Vavilov, 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 103:052006
• Publisher Policy: Reproduced under a Creative Commons licence