Measurement of direct photon emission in K+-->pi(+)pi(0)gamma decay

S Adler; M Aoki; M Ardebili; MS Atiya; PC Bergbusch; EW Blackmore; DA Bryman; IH Chiang; MR Convery; MV Diwan; JS Frank; JS Haggerty; T Inagaki; MM Ito; S Kabe; SH Kettell; Y Kishi; P Kitching; M Kobayashi; TK Komatsubara; A Konaka; Y Kuno; M Kuriki; TF Kycia; KK Li; LS Littenberg

doi:10.1103/PhysRevLett.85.4856

Measurement of direct photon emission in K+-->pi(+)pi(0)gamma decay

Phys Rev Lett. 2000 Dec 4;85(23):4856-9. doi: 10.1103/PhysRevLett.85.4856.

Authors

Affiliation

¹ Brookhaven National Laboratory (BNL), Upton, New York 11973, USA.

PMID: 11102135
DOI: 10.1103/PhysRevLett.85.4856

Abstract

We have performed a measurement of the K+-->pi(+)pi(0)gamma decay and have observed 2x10(4) events. The best fit to the decay spectrum gives a branching ratio for direct photon emission of (4.7+/-0.8+/-0. 3)x10(-6) in the pi(+) kinetic energy region of 55 to 90 MeV and requires no component due to interference with inner bremsstrahlung.