Light quark dependence of the Isgur-Wise function from QCD sum rules

Journal Article · Tue Nov 01 04:00:00 EST 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.5775· OSTI ID:7140400

Huang, T ^[1]; Luo, C ^[2]

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1. CCAST (World Laboratory), P.O. Box 8730, Beijing 100080 (China) Institute of High Energy Physics, P.O. Box 918 (4), Beijing 100039 (China)
2. Institute of High Energy Physics, P.O. Box 918 (4), Beijing 100039 (China)

We study the light quark dependence of the Isgur-Wise function for [ital B][sub [ital a]][r arrow][ital D][sub [ital a]] and [ital B][sub [ital a]][r arrow][ital D][sub [ital a]][sup *] in the framework of QCD sum rules. At zero recoil all the Isgur-Wise functions are equal, as required by heavy quark symmetry, and at nonzero recoil the Isgur-Wise function for [ital B][sub [ital s]] decay falls faster than that for [ital B][sub [ital u],][ital d] decay, which is just contrary to the recent prediction of the heavy meson chiral perturbation theory. As a by-product we also estimate SU(3)-breaking effects in the mass and the decay constant.

• OSTI ID: 7140400
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:9; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662130 -- General Theory of Particles & Fields-- S-Matrix Theory
Relativistic Scattering Theory-- (1992-)
662230 -- Quantum Chromodynamics-- (1992-)
662240* -- Models for Strong Interactions-- (1992-)
662350 -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
BEAUTY PARTICLES
BOSONS
CHARM PARTICLES
CHARMED MESONS
D MESONS
DECAY
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FIELD THEORIES
HADRONS
LIE GROUPS
MESONS
PARTICLE DECAY
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
SU GROUPS
SU-3 GROUPS
SUM RULES
SYMMETRY BREAKING
SYMMETRY GROUPS