Improved search for two body muon decay μ+ → e+XH

Charged lepton flavor violating muon decay μ+ → e+XH, where XH is a massive neutral boson, was sought by searching for extra peaks in the muon decay μ+ → e+ν¯ν energy spectrum in the mXH mass region 47.8–95.1 MeV/c2. No signal was found and 90% confidence level upper limits were set on the branching...

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Veröffentlicht in:	Physical review. D 2020-03, Vol.101 (5), p.1
Hauptverfasser:	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
Format:	Artikel
Sprache:	eng
Schlagworte:	Confidence intervals Decay Energy spectra Leptons Muons
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Zusammenfassung:	Charged lepton flavor violating muon decay μ+ → e+XH, where XH is a massive neutral boson, was sought by searching for extra peaks in the muon decay μ+ → e+ν¯ν energy spectrum in the mXH mass region 47.8–95.1 MeV/c2. No signal was found and 90% confidence level upper limits were set on the branching ratio Γ(μ+ → e+XH)/Γ(μ+ → e+ν¯ν) at the level of 10−5 for this region.
ISSN:	2470-0010 2470-0029
DOI:	10.1103/PhysRevD.101.052014