Background suppression for {mu}{r_arrow}e{gamma} with polarized muons
- Department of Physics, National Laboratory for High Energy Physics (KEK), Tsukuba, Ibaraki, Japan 305
A search for the lepton-flavor-violating {mu}{sup +}{r_arrow}e{sup +}{gamma} decay using polarized muons is reexamined in terms of suppression of the serious background arising from an accidental coincidence between an e{sup +} in the normal muon decay and a high energy photon in the radiative muon decay, {mu}{sup +}{r_arrow}e{sup +}{nu}{bar {nu}}{gamma}. It is found that a high energy photon in {mu}{sup +}{r_arrow}e{sup +}{nu}{bar {nu}}{gamma} decay is preferentially emitted parallel to the muon spin direction, similarly to e{sup +} in the normal muon decay. The selective measurements of either e{sup +}{close_quote}s or photons moving antiparallel to the muon spin direction would suppress the accidental background for {mu}{sup +}{r_arrow}e{sup +}{gamma} with right-handed and left-handed e{sup +}{close_quote}s, respectively. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 467570
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 5 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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