Garra Ticó, JordiGraugés Pous, EugeniBABAR Collaboration2019-05-162019-05-162012-11-090031-9007https://hdl.handle.net/2445/133260The photon spectrum in the inclusive electromagnetic radiative decays of the B meson, B → X s γ plus B → X d γ , is studied using a data sample of ( 382.8 ± 4.2 ) × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays collected by the BABAR experiment at SLAC. The spectrum is used to extract the branching fraction B ( B → X s γ ) = ( 3.21 ± 0.33 ) × 10 − 4 for E γ > 1.8     GeV and the direct C P asymmetry A C P ( B → X s + d γ ) = 0.057 ± 0.063 . The effects of detector resolution and Doppler smearing are unfolded to measure the photon energy spectrum in the B meson rest frame.8 p.application/pdfeng(c) American Physical Society, 2012Física de partículesExperimentsParticle physicsExperimentsinfo:eu-repo/semantics/article6324302019-05-16info:eu-repo/semantics/openAccess