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Subleading Isgur-Wise form factors from QCD sum rules

Journal Article · · Physical Review, D (Particles Fields); (United States)
 [1]
  1. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)
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In the heavy-quark effective theory, current matrix elements between two heavy pseudoscalar or vector mesons are parametrized by a set of universal form factors. These functions are calculated to subleading order in the 1/{ital m}{sub {ital Q}} expansion using QCD sum rules. The equations of motion and Ward identities of the effective theory are incorporated in the analysis. Within this approach, parameter-free predictions are obtained for all form factors at zero recoil. The results allow for an almost model-independent analysis of current-induced transitions between heavy mesons. As an application, the 1/{ital m}{sub {ital c}} and 1/{ital m}{sub {ital b}} corrections to the hadronic form factors describing semileptonic {ital B}{r arrow}{ital Dl}{nu} and {ital B}{r arrow}{ital D}{sup *}{ital l}{nu} decays are computed. The possibility of extracting {ital V}{sub {ital c}{ital b}} from these processes is discussed, and the importance of a measurement of symmetry-violating effects in ratios of form factors is pointed out.
DOE Contract Number:
AC03-76SF00515
OSTI ID:
7073243
Journal Information:
Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 46:9; ISSN PRVDA; ISSN 0556-2821
Country of Publication:
United States
Language:
English

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Related Subjects

662120 -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662230* -- Quantum Chromodynamics-- (1992-)
662350 -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
B MESONS
BEAUTY PARTICLES
BOSONS
CHARM PARTICLES
CHARMED MESONS
D MESONS
DECAY
DIFFERENTIAL EQUATIONS
ELEMENTARY PARTICLES
EQUATIONS
EQUATIONS OF MOTION
FERMIONS
FIELD THEORIES
FORM FACTORS
HADRONS
LEPTONS
MASS
MASSLESS PARTICLES
MATRIX ELEMENTS
MESONS
NEUTRINOS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE DECAY
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
RENORMALIZATION
SCALAR MESONS
SEMILEPTONIC DECAY
SPIN
SUM RULES
SYMMETRY BREAKING
WARD IDENTITY
WEAK PARTICLE DECAY