B{yields}D* at zero recoil revisited

Journal Article · Tue Jun 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.113002· OSTI ID:21407938

Gambino, Paolo; Mannel, Thomas; Uraltsev, Nikolai ^[1]

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1. Dipartimento di Fisica Teorica, Universita di Torino and INFN Torino, I-10125 Torino (Italy)

We examine the B{yields}D* form factor at zero recoil using a continuum QCD approach rooted in the heavy quark sum rules framework. A refined evaluation of the radiative corrections as well as the most recent estimates of higher-order power terms together with more careful continuum calculation are included. An upper bound on the form factor of F(1) < or approx. 0.93 is derived, based on just the positivity of inelastic contributions. A model-independent estimate of the inelastic contributions shows they are quite significant, lowering the form factor by about 6% or more. This results in an unbiased estimate F(1){approx_equal}0.86 with about 3% uncertainty in the central value.

• OSTI ID: 21407938
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 11; Other Information: DOI: 10.1103/PhysRevD.81.113002; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
B QUARKS
C QUARKS
D MESONS
EVALUATION
FORM FACTORS
PARTICLE DECAY
QUANTUM CHROMODYNAMICS
RADIATIVE CORRECTIONS
RECOILS
SUM RULES
T QUARKS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
CHARM PARTICLES
CHARMED MESONS
CORRECTIONS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FIELD THEORIES
HADRONS
MESONS
PARTICLE PROPERTIES
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
QUARKS
TOP PARTICLES