Measurement of inclusive radiative B-meson decays with a photon energy threshold of 1.7 GeV

Phys Rev Lett. 2009 Dec 11;103(24):241801. doi: 10.1103/PhysRevLett.103.241801. Epub 2009 Dec 7.

Abstract

Using 605 fb(-1) of data collected at the Upsilon(4S) resonance we present a measurement of the inclusive radiative B-meson decay channel, B-->X(s)gamma. For the lower photon energy thresholds of 1.7, 1.8, 1.9, and 2.0 GeV, as defined in the rest frame of the B meson, we measure the partial branching fraction and the mean and variance of the photon energy spectrum. At the 1.7 GeV threshold we obtain the partial branching fraction BF(B-->X(s)}gamma)=(3.45+/-0.15+/-0.40)x10(-4), where the errors are statistical and systematic.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Light*
  • Mesons*
  • Photons*
  • Spectrum Analysis
  • Thermodynamics