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AbstractAbstract
[en] An analysis of the decay B → Xs+dγ using the complete Υ(4S) data sample of the Belle experiment is presented. This inclusive analysis, reconstructs only the high energy photon from the signal B meson and a lepton from the partner B, with the purposes of flavor tagging and background suppression. The branching fraction is measured for several photon energy (E*γ) thresholds and extrapolated to the 1.6 GeV point. For the E*γ≥1.8 GeV the measured value is Bsγ=(3.12±0.10(stat)±0.19(syst)±0.08(model)±0.04(extrap)) x 10-4, consistent with Standard Model predictions. It allows to set a lower bound on the mass of a charged Higgs boson on the Two-Higgs-Doublet-Model of type II of mH+>or similar 580 GeV. The CP asymmetry (ACP(s+d)γ) is measured for several photon energy thresholds, testing its independence from this choice. The result is consistent with Standard Model expectations, for the E*γ ≥ 2.1 GeV the asymmetry is ACP(s+d)γ=(2.2±3.9(stat)±0.9(syst))%. An analysis of the photon energy spectrum allows to extract the HQE parameters mb=(4.627+0.030-0.031) GeV and μ2π=(0.301+0.070-0.066) GeV2. The values for the first and second spectral moments are also measured for several photon energy thresholds, for E*γ≥1.8 GeV the measured values are left angle E*γ right angle =(2.320±0.016±0.047±0.001) GeV and ΔE*γ=(4.258±0.525±1.498±0.050) x 10-2 GeV2.
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Source
Feb 2017; 183 p; ISSN 0172-8741;
; Diss. (Dr.rer.nat.)

Record Type
Report
Literature Type
Thesis/Dissertation; Numerical Data
Report Number
Country of publication
ANNIHILATION, ASYMMETRY, B MESONS, B QUARKS, BRANCHING RATIO, CP INVARIANCE, ELECTRON-POSITRON INTERACTIONS, ENERGY SPECTRA, EXPERIMENTAL DATA, FLAVOR MODEL, GAMMA SPECTRA, GEV RANGE 10-100, HADRONIC PARTICLE DECAY, INCLUSIVE INTERACTIONS, PAIR PRODUCTION, RADIATIVE DECAY, REST MASS, SYMMETRY BREAKING, UPSILON-10580 MESONS
BEAUTY MESONS, BEAUTY PARTICLES, BOSONS, BOTTOMONIUM, COMPOSITE MODELS, DATA, DECAY, DIMENSIONLESS NUMBERS, ELEMENTARY PARTICLES, ENERGY RANGE, FERMIONS, GEV RANGE, HADRONS, INFORMATION, INTERACTIONS, INVARIANCE PRINCIPLES, LEPTON-LEPTON INTERACTIONS, MASS, MATHEMATICAL MODELS, MESONS, NUMERICAL DATA, PARTICLE DECAY, PARTICLE INTERACTIONS, PARTICLE MODELS, PARTICLE PRODUCTION, PSEUDOSCALAR MESONS, QUARK MODEL, QUARKONIUM, QUARKS, SPECTRA, VECTOR MESONS
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