Search for a Nonrelativistic Boson in Two-Body Antimuon Decay.
Phys Rev Lett
; 131(24): 241802, 2023 Dec 15.
Article
em En
| MEDLINE
| ID: mdl-38181129
ABSTRACT
We demonstrate the feasibility of probing the charged lepton-flavor-violating decay µ^{+}âe^{+}X^{0} for the presence of a slow-moving neutral boson X^{0} capable of undergoing gravitational binding to large structures and, as such, able to participate in some cosmological scenarios. A short exposure to surface antimuons from beam line M20 at TRIUMF generates a branching ratio limit of â²10^{-5}. This is comparable to or better than previous searches for this channel, although in a thus-far-unexplored region of X^{0} phase space very close to the kinematic limit of the decay, where m_{X^{0}} approaches m_{µ^{+}}. The future improved sensitivity of the method using a customized p-type point-contact germanium detector is described.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
Estados Unidos