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

Abstract

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\to PA, VA and AA decays, where A, V and P denote an axial-vector, a vector and a pseudoscalar meson, respectively. We assume naive factorization hypothesis and use the improved version of the nonrelativistic ISGW quark model for form factors in B\to A transitions. We include contributions that arise from the effective ΔB=1 weak Hamiltonian H_{eff}. The respective factorized amplitude of these decays are explicitly showed and their penguin contributions are classified. We find that decays B^-to a_1^0π^-,\barB^0\to a_1^{\pm}π^{\mp}, B^-\to a_1^-\bar K^0, \bar B^0\to a_1^+K^-, \bar B^0\to f_1\bar K^0, B^-\to f_1K^-, B^-\to K_1^-(1400)\etap, B^-\to b_1^-\bar K^{0}, and \bar B^0\to b_1^+π^-(K^-) have branching ratios of the order of 10^{-5}. We also study the dependence of branching ratios for B \to K_1P(V,A) decays (K_1=K_1(1270),K_1(1400)) with respect to the mixing angle between K_A and K_B.

28 pages, 2 tables and one reference added, notation changed in appendices, some numerical results and abstract corrected

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• $B\to K_1\gamma$ Decays in the Light-Cone QCD Sum Rules
• Hadronic charmless B decays B-> AP
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• Analysis of the $B\to a_1(1260)$ form-factors with light-cone QCD sum rules
• Measurement of Branching Fraction and First Evidence of CP Violation in B0 --> a1+-(1260) pi-+ Decays
• What can we learn from $B\to a_1(1260)(b_1(1235))\pi (K)$ decays?
• Nonleptonic charmless two-body B decays involving tensor mesons in the covariant light-front approach
• Observation of B+->b_1+K0 and search for B-meson decays to b_10K0 and b_1pi0
• $B\to a_1(1260)a_1(1260)$ and $b_1(1235)b_1(1235)$ decays in the perturbative QCD approach
• A lattice QCD calculation of the transverse decay constant of the b1(1235) meson
• Nonleptonic decays of $B\to (f_1(1285),f_1(1420))V$ in the perturbative QCD approach
• Observation and Polarization Measurement of B0 --> a1(1260)+ a1(1260)- Decay
• Exclusive semileptonic and nonleptonic decays of B mesons to orbitally excited light mesons
• Search for B-meson decays to b1rho and b1K*
• Penguin-dominated $B\to \varphi K_1(1270)$ and $\varphi K_1(1400)$ decays in the perturbative QCD approach
• Properties of Axial-vector Mesons and Charmless B Decays: B -> VV, VA, AA
• Charmless hadronic $B\to (f_1(1285),f_1(1420))P$ decays in the perturbative QCD approach
• Perturbative QCD for B_s \to a_1(1260)(b_1(1235))P(V) Decays
• Nonleptonic charmless two-body $B\to AT$ decays
• B\to K_1π(K) decays in the perturbative QCD approach
• P wave mesons emitting weak decays of bottom mesons
• Analysis of $B\to a_1(1260)(b_1(1235))K^{\ast }$ decays in the perturbative QCD approach