The Rare Radiative Annihilation Decays $\bar{B}^0_{s,d} \to J/ψγ$

Details The Rare Radiative Annihilation Decays $\bar{B}^0_{s,d} \to J/ψγ$ The Rare Radiative Annihilation Decays $\bar{B}^0_{s,d} \to J/ψγ$

2003-08-26

arxiv.org/abs/hep-ph/0308256v1

Eur.Phys.J. C34 (2004) 291-296

Physics

High Energy Physics

High Energy Physics - Phenomenology

13pages, 3figures

Scientific paper

10.1140/epjc/s2004-01711-y

We investigate the physics potential of the annihilation decays $\bar{B}^0_{s,d} \to J/\psi$ $\gamma$ in the Standard Model and beyond. In naive factorization approach, the branching ratios are estimated to be $\mathcal{B}(\bar{B}^0_s \to J/\psi\gamma)=1.40\times 10^{-6}$ and $\mathcal{B}(\bar{B}^0_d \to J/\psi\gamma)=5.29\times 10^{-8}$. In the framework of QCD factorization, we compute the non-factorizable corrections and get $\mathcal{B}(\bar{B}^0_s \to J/\psi\gamma) = 2.11\times10^{-7}$, $\mathcal{B}(\bar{B}^0_d \to J/\psi\gamma) =7.65\times10^{-9}$. Future measurements of these decays would be useful for testing the factorization frameworks. The smallness of these decays in the SM make them sensitive probes of New Physics. As an example, we will consider the possible admixture of (V+A) charge current to the standard (V-A) current. This admixture will give significant contributions to the decays.

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