Nonleptonic two-body B decays including axial-vector mesons in the final state

Journal Article · Thu Nov 01 04:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.094019· OSTI ID:21032569

Calderon, G; Munoz, J H; Vera, C E ^[1]

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1. Facultad de Ingenieria Mecanica y Electrica, Universidad Autonoma de Coahuila, CP 27000, Torreon, Coahuila (Mexico)

We present a systematic study of exclusive charmless nonleptonic two-body B decays including axial-vector mesons in the final state. We calculate branching ratios of B{yields}PA, VA, and AA decays, where A, V, and P denote an axial vector, a vector, and a pseudoscalar meson, respectively. We assume a naive factorization hypothesis and use the improved version of the nonrelativistic Isgur-Scora-Grinstein-Wise quark model for form factors in B{yields}A transitions. We include contributions that arise from the effective {delta}B=1 weak Hamiltonian H{sub eff}. The respective factorized amplitudes of these decays are explicitly shown and their penguin contributions are classified. We find that decays B{sup -}{yields}a{sub 1}{sup 0}{pi}{sup -}, B{sup 0}{yields}a{sub 1}{sup {+-}}{pi}{sup {+-}}, B{sup -}{yields}a{sub 1}{sup -}K{sup 0}, B{sup 0}{yields}a{sub 1}{sup +}K{sup -}, B{sup 0}{yields}f{sub 1}K{sup 0}, B{sup -}{yields}f{sub 1}K{sup -}, B{sup -}{yields}K{sub 1}{sup -}(1400){eta}{sup (')}, B{sup -}{yields}b{sub 1}{sup -}K{sup 0}, and B{sup 0}{yields}b{sub 1}{sup +}{pi}{sup -}(K{sup -}) have branching ratios of the order of 10{sup -5}. We also study the dependence of branching ratios for B{yields}K{sub 1}P(V,A) decays [K{sub 1}=K{sub 1}(1270), K{sub 1}(1400)] with respect to the mixing angle between K{sub 1A} and K{sub 1B}.

• OSTI ID: 21032569
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 76; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
A1-1260 MESONS
AMPLITUDES
B MINUS MESONS
B NEUTRAL MESONS
BRANCHING RATIO
FACTORIZATION
FORM FACTORS
HAMILTONIANS
K1-1270 MESONS
K1-1400 MESONS
KAONS MINUS
KAONS NEUTRAL
PIONS MINUS
QUANTUM CHROMODYNAMICS
QUARK MODEL
WEINBERG ANGLE