B{yields}V, A, T tensor form factors in the covariant light-front approach: Implications on radiative B decays

Journal Article · Tue Jun 01 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.114006· OSTI ID:21407952

Haiyang, Cheng ^[1]; Chua, C -K ^[2]

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1. Institute of Physics, Academia Sinica, Taipei, Taiwan 115 (China)
2. Department of Physics, Chung Yuan Christian University, Chung-Li, Taiwan 320 (China)

We reanalyze the B{yields}M tensor form factors in a covariant light-front quark model, where M represents a vector meson V, an axial-vector meson A, or a tensor meson T. The treatment of masses and mixing angles in the K{sub 1A,1B} systems is improved, where K{sub 1A} and K{sub 1B} are the {sup 3}P{sub 1} and {sup 1}P{sub 1} states of the axial-vector meson K{sub 1}, respectively. Rates of B{yields}M{gamma} decays are then calculated using the QCD factorization approach. The updated B{yields}K*{gamma}, B{yields}K{sub 1}(1270){gamma}, K{sub 1}(1400){gamma}, and K{sub 2{gamma}} rates agree with the data. The K{sub 1}(1270)-K{sub 1}(1400) mixing angle is found to be about 51 deg. The sign of the mixing angle is fixed by the observed relative strength of B{yields}K{sub 1}(1270){gamma} and K{sub 1}(1400){gamma}. The formalism is then applied to B{sub s{yields}}M tensor form factors. We find that the calculated B{sub s{yields}{phi}{gamma}} rate is consistent with experiment, though in the lower end of the data. The branching fractions of B{sub s{yields}}f{sub 1}(1420){gamma} and f{sub 2}{sup '}(1525){gamma} are predicted to be of order 10{sup -5} and it will be interesting to search for these modes. Rates on B{sub s{yields}}f{sub 1}(1285){gamma}, h{sub 1}(1380){gamma}, h{sub 1}(1170){gamma}, f{sub 2}(1270){gamma} decays are also predicted.

• OSTI ID: 21407952
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AXIAL VECTOR MESONS
BOSONS
BRANCHING RATIO
COMPOSITE MODELS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
F2 PRIME-1525 MESONS
F2-1270 MESONS
FACTORIZATION
FIELD THEORIES
FORM FACTORS
GAMMA DECAY
H1-1170 MESONS
HADRONS
K1-1270 MESONS
K1-1400 MESONS
MASS
MATHEMATICAL MODELS
MESONS
NUCLEAR DECAY
PARTICLE MODELS
PARTICLE PROPERTIES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKONIUM
STRANGE MESONS
STRANGE PARTICLES
STRANGEONIUM
TENSOR MESONS
VECTOR MESONS
WEINBERG ANGLE