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Title: Comparative analysis of nonperturbative effects in B{yields}X{sub u}l{nu}{sub l} decays

Abstract

In order to extract the Cabibbo-Kobayashi-Maskawa matrix element |V{sub ub}| from B{yields}X{sub u}l{nu}{sub l} decays, the overwhelming background from B{yields}X{sub c}l{nu}{sub l} decays must be reduced by appropriate acceptance cuts. We study the nonperturbative effects due to the motion of the b quark inside the B meson on the phenomenologically relevant decay distributions of B{yields}X{sub u}l{nu}{sub l} in the presence of such cuts in a comparative analysis based on shape functions and the parton model in the light cone limit. Comparisons with recent data from the CLEO, BABAR, and BELLE collaborations favor the shape-function approach.

Authors:
; ;  [1];  [2]
  1. II. Institut fuer Theoretische Physik, Universitaet Hamburg, Luruper Chaussee 149, 22761 Hamburg (Germany)
  2. (China)
Publication Date:
OSTI Identifier:
21020283
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.75.074023; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B MESONS; B QUARKS; CESR STORAGE RING; COMPARATIVE EVALUATIONS; CP INVARIANCE; DISTRIBUTION; GLUON MODEL; GLUONS; KOBAYASHI-MASKAWA MATRIX; LIGHT CONE; MULTIPARTICLE SPECTROMETERS; NEUTRINOS; PARTICLE IDENTIFICATION; QUARK MODEL; SEMILEPTONIC DECAY

Citation Formats

Kniehl, Bernd A., Kramer, Gustav, Yang Jifeng, and Department of Physics, East China Normal University, 3663th Zhong Shan Bei Road, Shanghai 200062. Comparative analysis of nonperturbative effects in B{yields}X{sub u}l{nu}{sub l} decays. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.074023.
Kniehl, Bernd A., Kramer, Gustav, Yang Jifeng, & Department of Physics, East China Normal University, 3663th Zhong Shan Bei Road, Shanghai 200062. Comparative analysis of nonperturbative effects in B{yields}X{sub u}l{nu}{sub l} decays. United States. doi:10.1103/PHYSREVD.75.074023.
Kniehl, Bernd A., Kramer, Gustav, Yang Jifeng, and Department of Physics, East China Normal University, 3663th Zhong Shan Bei Road, Shanghai 200062. Sun . "Comparative analysis of nonperturbative effects in B{yields}X{sub u}l{nu}{sub l} decays". United States. doi:10.1103/PHYSREVD.75.074023.
@article{osti_21020283,
title = {Comparative analysis of nonperturbative effects in B{yields}X{sub u}l{nu}{sub l} decays},
author = {Kniehl, Bernd A. and Kramer, Gustav and Yang Jifeng and Department of Physics, East China Normal University, 3663th Zhong Shan Bei Road, Shanghai 200062},
abstractNote = {In order to extract the Cabibbo-Kobayashi-Maskawa matrix element |V{sub ub}| from B{yields}X{sub u}l{nu}{sub l} decays, the overwhelming background from B{yields}X{sub c}l{nu}{sub l} decays must be reduced by appropriate acceptance cuts. We study the nonperturbative effects due to the motion of the b quark inside the B meson on the phenomenologically relevant decay distributions of B{yields}X{sub u}l{nu}{sub l} in the presence of such cuts in a comparative analysis based on shape functions and the parton model in the light cone limit. Comparisons with recent data from the CLEO, BABAR, and BELLE collaborations favor the shape-function approach.},
doi = {10.1103/PHYSREVD.75.074023},
journal = {Physical Review. D, Particles Fields},
number = 7,
volume = 75,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}