Neural network parametrization of the lepton energy spectrum in semileptonic B meson decays

Abstract

We construct a parametrization of the lepton energy spectrum in inclusive semileptonic decays of B mesons, based on the available experimental information: moments of the spectrum with cuts, their errors and their correlations, together with kinematical constraints. The result is obtained in the form of a Monte Carlo sample of neural networks trained on replicas of the experimental data, which represents the probability density in the space of lepton energy spectra. This parametrization is then used to extract the b quark mass m_b^{1S} in a way that theoretical uncertainties are minimized, for which the value m_b^{1S}=4.84 \pm 0.14^{exp}\pm 0.05^{th} GeV is obtained.

32 pages, 22 figures, JHEP3 class. v4 version accepted for publication in JHEP

References in corpus (18)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Theory of Charmless Inclusive B Decays and the Extraction of V_{ub}
• Global analysis of inclusive B decays
• Comment on form factor shape and extraction of |V_ub| from B --> pi l nu
• Fit to Moments of Inclusive B->Xc lv and B-> Xs gamma Decay Distributions using Heavy Quark Expansions in the Kinetic Scheme
• Inclusive spectra in charmless semileptonic B decays by Dressed Gluon Exponentiation
• Perturbative corrections to semileptonic b decay distributions
• Measurement of the Electron Energy Spectrum and its Moments in Inclusive B->X e nu Decays
• Determination of the Branching Fraction for B --> Xc l nu Decays and of |Vcb| from Hadronic-Mass and Lepton-Energy Moments
• Determination of heavy quark non-perturbative parameters from spectral moments in semileptonic B decays
• Measurement of the Inclusive Electron Spectrum in Charmless Semileptonic B Decays Near the Kinematic Endpoint and Determination of |Vub|
• Unbiased determination of the proton structure function F_2^p with faithful uncertainty estimation
• Genetic Algorithms and Experimental Discrimination of SUSY Models
• Measurement of the Moments of the Hadronic Invariant Mass Distribution in Semileptonic B Decays
• Hadronic mass and q^2 moments of charmless semileptonic B decay distributions
• Taming the B --> X(s) gamma spectrum by Dressed Gluon Exponentiation
• Semileptonic and radiative B decays circa 2005
• Improving Extractions of |Vcb| and the b Quark Mass from Semileptonic Inclusive B Decay

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• Continuous simulation of hypothetical physics processes with multiple free parameters
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