TY - JOUR

T1 - Contribution of b → sgg through the QCD anomaly in exclusive decays B± → (η′,η)(K±,K* ±) and B0 → (η′,η)(K0,K* 0)

AU - Ali, A.

AU - Chay, J.

AU - Greub, C.

AU - Ko, P.

N1 - Funding Information:
J.C. and P.K. are grateful to DESY for hospitality, where this work was initiated. A.A. would like to thank Professor H.S. Song for the hospitality at Seoul National University. This work has been partially supported by the German-Korean scientific exchange programme DFG-446-KOR-113/72/0 and by Schweizerischer Nationalfonds. J.C. and P.K. were supported in part by the Ministry of Education grants BSRI 97-2408 and BSRI 97-2418, respectively, and the Korea Science and Engineering Foundation (KOSEF) through the SRC program of SNU-CTP, and the Distinguished Scholar Exchange Program of Korea Research Foundation. PK is also supported in part by KOSEF, Contract 971-0201-002-2. We would like to thank Thorsten Feldmann, Gustav Kramer, Heiri Leutwyler, Peter Minkowski, Hubert Simma and Jim Smith for discussions.

PY - 1998/4/2

Y1 - 1998/4/2

N2 - We compute the decay rates for the exclusive decays B± → (η′,η)(K±,K* ±) and B0 → (η′,η)(K0,K* 0) in a QCD-improved factorization framework by including the contribution from the process b → sgg → s(η′,η) through the QCD anomaly. This method provides an alternative estimate of the contribution b → scc̄ → s(η′,η) to these decays as compared to the one using the intrinsic charm content of the η′ and η mesons determined through the decays J/ψ → (η,η′,ηc)γ. The advantage of computing the relevant matrix elements via the QCD anomaly governing the transition gg → (η′,η) is that there is no sign ambiguity in these contributions relative to the matrix elements from the rest of the operators in the weak effective Hamiltonian. Numerically, the QCD anomaly method and the one using the radiative decays J/ψ → (η,η′,ηc)γ give similar branching ratios for the decays of interest here. The resulting branching ratios are compared with the CLEO data on B± → η′K± and B0 → η′K0 and predictions are made for the rest.

AB - We compute the decay rates for the exclusive decays B± → (η′,η)(K±,K* ±) and B0 → (η′,η)(K0,K* 0) in a QCD-improved factorization framework by including the contribution from the process b → sgg → s(η′,η) through the QCD anomaly. This method provides an alternative estimate of the contribution b → scc̄ → s(η′,η) to these decays as compared to the one using the intrinsic charm content of the η′ and η mesons determined through the decays J/ψ → (η,η′,ηc)γ. The advantage of computing the relevant matrix elements via the QCD anomaly governing the transition gg → (η′,η) is that there is no sign ambiguity in these contributions relative to the matrix elements from the rest of the operators in the weak effective Hamiltonian. Numerically, the QCD anomaly method and the one using the radiative decays J/ψ → (η,η′,ηc)γ give similar branching ratios for the decays of interest here. The resulting branching ratios are compared with the CLEO data on B± → η′K± and B0 → η′K0 and predictions are made for the rest.

UR - http://www.scopus.com/inward/record.url?scp=0347131490&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(98)00174-9

DO - 10.1016/S0370-2693(98)00174-9

M3 - Article

AN - SCOPUS:0347131490

SN - 0370-2693

VL - 424

SP - 161

EP - 174

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-2

ER -