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

Xinqiang Li·Gongru Lu·Rumin Wang·Y. D. Yang
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Abstract

We present the first study of the rare annihilation decay $\bar{B}^0_d \to ϕγ$ in the Standard Model. Using QCD factorization formalism, we find ${\cal B}(\bar{B}^0_d \toϕγ)=3.6\times 10^{-12}$. 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 $|λ^{''}_{i23}λ^{''}_{i12}|$ and $|λ^{'}_{i32}λ^{'*}_{i12}|$, ${\cal B}(\bar{B}^0_d \toϕγ)$ 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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Xinqiang Li, Gongru Lu, Rumin Wang, Y. D. Yang. 2003-05-29. The rare $\bar{B}^0_{d} \to ϕγ$ decays in Standard Model and as a probe of R-parity violation. https://doi.org/10.1140/epjc%2Fs2004-01878-1

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