Measurement of the Moments of the Photon Energy Spectrum in B -> X_s gamma Decays and Determination of |V_cb| and m_b at Belle

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dc.creatorBelle Collaboration
dc.creatorSchwanda, C.
dc.creatorUrquijo, P.
dc.creatorBarberio, E.
dc.creatorLimosani, A.
dc.date2008-03-14
dc.date2008-08-28
dc.date.accessioned2026-07-07T11:49:06Z
dc.date.available2026-07-07T11:49:06Z
dc.descriptionUsing the previous Belle measurement of the inclusive photon energy in $B\to X_sγ$ decays, we determine the first and second moments of this spectrum for minimum photon energies in the $B$ meson rest frame ranging from 1.8 to 2.3 GeV. Combining these measurements with recent Belle data on the lepton energy and hadronic mass moments in $B\to X_c\ellν$ decays, we perform fits to theoretical expressions derived in the 1S and kinetic mass schemes and extract the magnitude of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element $V_{cb}$, the $b$-quark mass and other non-perturbative parameters. In the 1S scheme analysis we find $|V_{cb}|=(41.56\pm 0.68(\mathrm{fit})\pm 0.08(τ_B))\times 10^{-3}$ and $m_b^\mathrm{1S}=(4.723\pm 0.055)$ GeV. In the kinetic scheme, we obtain $|V_{cb}|=(41.58\pm 0.69(\mathrm{fit})\pm 0.08(τ_B)\pm 0.58(\mathrm{th}))\times 10^{-3}$ and $m_b^\mathrm{kin}=(4.543\pm 0.075)$ GeV.
dc.description19 pages, 9 figures, 12 tables
dc.identifierhttps://arxiv.org/abs/0803.2158
dc.identifierhttp://arxiv.org/abs/0803.2158
dc.identifierPhys.Rev.D78:032016,2008
dc.identifierdoi:10.1103/PhysRevD.78.032016
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203117
dc.subjectHigh Energy Physics - Experiment
dc.titleMeasurement of the Moments of the Photon Energy Spectrum in B -> X_s gamma Decays and Determination of |V_cb| and m_b at Belle
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