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Title: B{yields}S transition form factors in the perturbative QCD approach

Abstract

Under two different scenarios for the light scalar mesons, we investigate the transition form factors of B(B{sub s}) mesons decay into a scalar meson in the perturbative QCD approach. In the large recoiling region, the form factors are dominated by the short-distance dynamics and can be calculated using perturbation theory. We adopt the dipole parametrization to recast the q{sup 2} dependence of the form factors. Since the decay constants defined by the scalar current are large, our predictions on the B{yields}S form factors are much larger than the B{yields}P transitions, especially in the second scenario. Contributions from various light-cone distribution amplitudes (LCDAs) are elaborated and we find that the twist-3 LCDAs provide more than one-half of the contributions to the form factors. The two terms of the twist-2 LCDAs give destructive contributions in the first scenario while they give constructive contributions in the second scenario. With the form factors, we also predict the decay width and branching ratios of the semileptonic B{yields}Sl{nu} and B{yields}Sl{sup +}l{sup -} decays. The branching ratios of B{yields}Sl{nu} channels are found to have the order of 10{sup -4} while those of B{yields}Sl{sup +}l{sup -} have the order of 10{sup -7}. These predictions can be tested bymore » the future experiments.« less

Authors:
 [1];  [2]; ;  [2]
  1. School of Physics, Shandong University, Jinan, Shandong 250100 (China)
  2. Institute of High Energy Physics, P.O. Box 918(4), Beijing 100049 (China)
Publication Date:
OSTI Identifier:
21254696
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 79; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevD.79.014013; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; B MESONS; B S MESONS; BRANCHING RATIO; DIPOLES; DISTRIBUTION; FORECASTING; FORM FACTORS; LIGHT CONE; PARTICLE DECAY; PERTURBATION THEORY; QUANTUM CHROMODYNAMICS; SCALAR MESONS; SEMILEPTONIC DECAY

Citation Formats

Runhui, Li, Institute of High Energy Physics, P.O. Box 918, Caidian, Lue, Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210097, Wei, Wang, and Xiaoxia, Wang. B{yields}S transition form factors in the perturbative QCD approach. United States: N. p., 2009. Web. doi:10.1103/PHYSREVD.79.014013.
Runhui, Li, Institute of High Energy Physics, P.O. Box 918, Caidian, Lue, Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210097, Wei, Wang, & Xiaoxia, Wang. B{yields}S transition form factors in the perturbative QCD approach. United States. https://doi.org/10.1103/PHYSREVD.79.014013
Runhui, Li, Institute of High Energy Physics, P.O. Box 918, Caidian, Lue, Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210097, Wei, Wang, and Xiaoxia, Wang. 2009. "B{yields}S transition form factors in the perturbative QCD approach". United States. https://doi.org/10.1103/PHYSREVD.79.014013.
@article{osti_21254696,
title = {B{yields}S transition form factors in the perturbative QCD approach},
author = {Runhui, Li and Institute of High Energy Physics, P.O. Box 918 and Caidian, Lue and Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210097 and Wei, Wang and Xiaoxia, Wang},
abstractNote = {Under two different scenarios for the light scalar mesons, we investigate the transition form factors of B(B{sub s}) mesons decay into a scalar meson in the perturbative QCD approach. In the large recoiling region, the form factors are dominated by the short-distance dynamics and can be calculated using perturbation theory. We adopt the dipole parametrization to recast the q{sup 2} dependence of the form factors. Since the decay constants defined by the scalar current are large, our predictions on the B{yields}S form factors are much larger than the B{yields}P transitions, especially in the second scenario. Contributions from various light-cone distribution amplitudes (LCDAs) are elaborated and we find that the twist-3 LCDAs provide more than one-half of the contributions to the form factors. The two terms of the twist-2 LCDAs give destructive contributions in the first scenario while they give constructive contributions in the second scenario. With the form factors, we also predict the decay width and branching ratios of the semileptonic B{yields}Sl{nu} and B{yields}Sl{sup +}l{sup -} decays. The branching ratios of B{yields}Sl{nu} channels are found to have the order of 10{sup -4} while those of B{yields}Sl{sup +}l{sup -} have the order of 10{sup -7}. These predictions can be tested by the future experiments.},
doi = {10.1103/PHYSREVD.79.014013},
url = {https://www.osti.gov/biblio/21254696}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 1,
volume = 79,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2009},
month = {Thu Jan 01 00:00:00 EST 2009}
}