### Abstract

We compute the decay rates for the exclusive decays B^{±} → (η′,η)(K^{±},K^{* ±}) and B^{0} → (η′,η)(K^{0},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′,η_{c})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′,η_{c})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 B^{0} → η′K^{0} and predictions are made for the rest.

Original language | English |
---|---|

Pages (from-to) | 161-174 |

Number of pages | 14 |

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

Volume | 424 |

Issue number | 1-2 |

Publication status | Published - 1998 Apr 2 |

### Fingerprint

### ASJC Scopus subject areas

- Nuclear and High Energy Physics

### Cite this

^{±}→ (η′,η)(K

^{±},K

^{* ±}) and B

^{0}→ (η′,η)(K

^{0},K

^{* 0}).

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

*424*(1-2), 161-174.

**Contribution of b → sgg through the QCD anomaly in exclusive decays B ^{±} → (η′,η)(K^{±},K^{* ±}) and B^{0} → (η′,η)(K^{0},K^{* 0}).** / Ali, A.; Chay, Junegone; Greub, C.; Ko, P.

Research output: Contribution to journal › Article

^{±}→ (η′,η)(K

^{±},K

^{* ±}) and B

^{0}→ (η′,η)(K

^{0},K

^{* 0})',

*Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics*, vol. 424, no. 1-2, pp. 161-174.

}

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, Junegone

AU - Greub, C.

AU - Ko, P.

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

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

M3 - Article

AN - SCOPUS:0347131490

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

SN - 0370-2693

IS - 1-2

ER -