New result of the measurement of the direct photon emission in K+ ---> pi+ pi0 gamma decay

Collaboration
Nov, 2005

Citations per year

200620082010201220132301
Abstract: (arXiv)
We present a new result on the K^+ --> pi^+ pi^0 gamma decay measurement using stopped kaons. The best fit to the decay spectrum comprised of 10k events gives a branching ratio for the direct photon emission of [3.8+-0.8(stat)+-0.7(syst)] times 10^{-6} in the pi^+ kinetic energy region of 55 to 90 MeV. This result has been obtained with the assumption that there is no component due to interference with the inner bremsstrahlung.
  • K+: radiative decay
  • at rest
  • photon: direct production
  • K+: branching ratio
  • anomaly: chiral
  • angular distribution: (pi+ pi0)
  • photon: energy spectrum
  • pi+: momentum
  • experimental results
  • KEK PS