skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Semileptonic decays [ital D][r arrow][pi]([rho])[ital e][nu] and [ital B][r arrow][pi]([rho])[ital e][nu] from QCD sum rules

Abstract

We investigate the semileptonic decays of [ital B] and [ital D] mesons into [pi] and [rho] mesons, respectively, by means of QCD sum rules. We find that for the vector form factors involved the pole dominance hypothesis is valid to good accuracy with pole masses in the expected range. Pole dominance, however, does not apply to the axial form factors which results in specific predictions for the predominant polarization of the [rho] meson and the shape of the lepton spectrum. For the total decay rates we find [Gamma]([ital [bar B]] [sup 0][r arrow][pi][sup +][ital e[minus]] [bar [nu]])=(5.1[plus minus]1.1)[vert bar][ital V][sub [ital u][ital b]][vert bar][sup 2][times]10[sup 12] s[sup [minus]1], [Gamma]([ital D][sup 0][r arrow][pi][sup [minus]][ital e+][nu])=(8.0[plus minus]1.7)[vert bar][ital V][sub [ital c][ital d]][vert bar][sup 2][times]10[sup 10] s[sup [minus]1], [Gamma]([ital [bar B]] [sup 0][r arrow][rho][sup +][ital e[minus]] [bar [nu]])=(1.2[plus minus]0.4)[vert bar][ital V][sub [ital u][ital b]][vert bar][sup 2][times]10[sup 13] s[sup [minus]1], and [Gamma]([ital D][sup 0][r arrow][rho][sup [minus]][ital e+][nu])=(2.4[plus minus]0.7)[vert bar][ital V][sub [ital c][ital d]][vert bar][sup 2][times]10[sup 9] s[sup [minus]1].

Authors:
 [1]
  1. Physik-Department, TU Muenchen, D-8046 Garching (Germany)
Publication Date:
OSTI Identifier:
6244100
Resource Type:
Journal Article
Journal Name:
Physical Review, D (Particles Fields); (United States)
Additional Journal Information:
Journal Volume: 48:7; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B MESONS; SEMILEPTONIC DECAY; D MESONS; FORM FACTORS; KOBAYASHI-MASKAWA MATRIX; PIONS; POLARIZATION; QUANTUM CHROMODYNAMICS; STANDARD MODEL; SUM RULES; BEAUTY PARTICLES; BOSONS; CHARM PARTICLES; CHARMED MESONS; DECAY; ELEMENTARY PARTICLES; EQUATIONS; FIELD THEORIES; HADRONS; MATHEMATICAL MODELS; MATRICES; MESONS; PARTICLE DECAY; PARTICLE MODELS; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; UNIFIED GAUGE MODELS; UNIFIED-FIELD THEORIES; WEAK PARTICLE DECAY; 662350* - Decays of Mesons- (1992-); 662130 - General Theory of Particles & Fields- S-Matrix Theory, Relativistic Scattering Theory- (1992-); 662230 - Quantum Chromodynamics- (1992-); 662240 - Models for Strong Interactions- (1992-)

Citation Formats

Ball, P. Semileptonic decays [ital D][r arrow][pi]([rho])[ital e][nu] and [ital B][r arrow][pi]([rho])[ital e][nu] from QCD sum rules. United States: N. p., 1993. Web. doi:10.1103/PhysRevD.48.3190.
Ball, P. Semileptonic decays [ital D][r arrow][pi]([rho])[ital e][nu] and [ital B][r arrow][pi]([rho])[ital e][nu] from QCD sum rules. United States. https://doi.org/10.1103/PhysRevD.48.3190
Ball, P. Fri . "Semileptonic decays [ital D][r arrow][pi]([rho])[ital e][nu] and [ital B][r arrow][pi]([rho])[ital e][nu] from QCD sum rules". United States. https://doi.org/10.1103/PhysRevD.48.3190.
@article{osti_6244100,
title = {Semileptonic decays [ital D][r arrow][pi]([rho])[ital e][nu] and [ital B][r arrow][pi]([rho])[ital e][nu] from QCD sum rules},
author = {Ball, P},
abstractNote = {We investigate the semileptonic decays of [ital B] and [ital D] mesons into [pi] and [rho] mesons, respectively, by means of QCD sum rules. We find that for the vector form factors involved the pole dominance hypothesis is valid to good accuracy with pole masses in the expected range. Pole dominance, however, does not apply to the axial form factors which results in specific predictions for the predominant polarization of the [rho] meson and the shape of the lepton spectrum. For the total decay rates we find [Gamma]([ital [bar B]] [sup 0][r arrow][pi][sup +][ital e[minus]] [bar [nu]])=(5.1[plus minus]1.1)[vert bar][ital V][sub [ital u][ital b]][vert bar][sup 2][times]10[sup 12] s[sup [minus]1], [Gamma]([ital D][sup 0][r arrow][pi][sup [minus]][ital e+][nu])=(8.0[plus minus]1.7)[vert bar][ital V][sub [ital c][ital d]][vert bar][sup 2][times]10[sup 10] s[sup [minus]1], [Gamma]([ital [bar B]] [sup 0][r arrow][rho][sup +][ital e[minus]] [bar [nu]])=(1.2[plus minus]0.4)[vert bar][ital V][sub [ital u][ital b]][vert bar][sup 2][times]10[sup 13] s[sup [minus]1], and [Gamma]([ital D][sup 0][r arrow][rho][sup [minus]][ital e+][nu])=(2.4[plus minus]0.7)[vert bar][ital V][sub [ital c][ital d]][vert bar][sup 2][times]10[sup 9] s[sup [minus]1].},
doi = {10.1103/PhysRevD.48.3190},
url = {https://www.osti.gov/biblio/6244100}, journal = {Physical Review, D (Particles Fields); (United States)},
issn = {0556-2821},
number = ,
volume = 48:7,
place = {United States},
year = {1993},
month = {10}
}