Measurement of the K{sup +{yields}{pi}0{mu}+{nu}}{sub {mu}{gamma}}branching ratio

Journal Article · Sat May 01 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.092001· OSTI ID:21409912

Adler, S; Chiang, I-H; Diwan, M V; Frank, J S; Haggerty, J S; Jaffe, D E; Jain, V; Kettell, S H; Li, K K; Littenberg, L S; Ng, C; Strand, R C; Witzig, C ^[1]; Bazarko, A O; Ito, M M; Meyers, P D; Shoemaker, F C; Stone, J R ^[2]; Bergbusch, P C; Bryman, D A ^[3]

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1. Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544 (United States)
3. Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1 (Canada)

A measurement of the decay K{sup +{yields}{pi}0{mu}+{nu}}{sub {mu}{gamma}}has been performed with the E787 detector at Brookhaven National Laboratory. Forty events were observed in the signal region with the background expectation of (16.5{+-}2.7) events. The branching ratio was measured to be (1.58{+-}0.46(stat.){+-}0.08(syst.))x10{sup -5} in the kinematic region E{sub {gamma}>}30 MeV and {theta}{sub {mu}{gamma}>}20 deg., where E{sub {gamma}}is the energy of the emitted photon and {theta}{sub {mu}{gamma}}is the angle between the muon and the photon in the K{sup +} rest frame. The results were consistent with theoretical predictions.

• OSTI ID: 21409912
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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