The rare $\bar{B}^0_{d} \to φγ$ decays in Standard Model and as a probe of R-parity violation

Details The rare $\bar{B}^0_{d} \to φγ$ decays in Standard Model and as a probe of R-parity violation The rare $\bar{B}^0_{d} \to φγ$ decays in Standard Model and as a probe of R-parity violation

2003-05-25

arxiv.org/abs/hep-ph/0305283v2

Eur.Phys.J. C36 (2004) 97-102

Physics

High Energy Physics

High Energy Physics - Phenomenology

References added. RPV Lambda' contributions are included

Scientific paper

10.1140/epjc/s2004-01878-1

We present the first study of the rare annihilation decay $\bar{B}^0_d \to \phi\gamma$ in the Standard Model. Using QCD factorization formalism, we find ${\cal B}(\bar{B}^0_d \to\phi\gamma)=3.6\times 10^{-12}$. The smallness of the decay rate in the Standard Model make the decay a sensitive probe of new physics contributions. As an example, we calculate the effects of R-parity violating couplings. Within the available upper bounds for $|\lambda^{''}_{i23}\lambda^{''}_{i12}|$ and $|\lambda^{'}_{i32}\lambda^{'*}_{i12}|$, ${\cal B}(\bar{B}^0_d \to\phi\gamma)$ could be enhanced to order of $10^{-9}\sim 10^{-8}$, which might be accessible at LHCB, B-TeV and the planning super high luminosity B factories at KEK and SLAC.

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