A Measurement of the Branching Fraction for the Inclusive B --> X(s) gamma Decays with the Belle Detector

TL;DR

This paper reports a precise measurement of the inclusive B meson decay rate to X(s) gamma using data from the Belle detector, providing valuable input for testing the Standard Model and constraining new physics.

Contribution

First measurement of the inclusive B --> X(s) gamma branching fraction using Belle detector data with improved precision.

Findings

Branching fraction measured as (3.36 +/- 0.53(stat) +/- 0.42(sys) +0.50-0.54(th)) x 10^{-4}

Based on 6.07 million BBbar events at Upsilon(4S) resonance

Results help refine theoretical models of B meson decays

Abstract

We have measured the branching fraction of the inclusive radiative B meson decay B --> X(s) gamma to be Br(B->X(s)gamma)=(3.36 +/- 0.53(stat) +/- 0.42(sys) +0.50-0.54(th)) x 10^{-4}. The result is based on a sample of 6.07 x 10^6 BBbar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric e^+e^- storage ring.