$μ\to eγ$ Search with Polarized Muons

Details $μ\to eγ$ Search with Polarized Muons $μ\to eγ$ Search with Polarized Muons

1996-04-11

arxiv.org/abs/hep-ph/9604296v1

Phys.Rev.Lett. 77 (1996) 434-438

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 2 figures, also available via anonymous ftp at ftp://ftp.kek.jp/kek/preprints/TH/TH-478

Scientific paper

10.1103/PhysRevLett.77.434

A search for the lepton-flavor violating $\mu^{+}\rightarrow e^{+}\gamma$ decay using polarized muons is proposed. By measuring the angular distribution of $e^{+}$s with respect to the muon spin direction, in particular antiparallel $e^{+}$s, the serious physics background from $\mu^{+}\rightarrow e^{+}\nu\overline{\nu}\gamma$ as well as accidental background from normal muon decay accompanied by a high-energy photon can be suppressed significantly. In addition to the enhancement of the sensitivity, the angular distribution would discriminate among different extensions to the Standard Model, once the signal is observed.

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