Radiative Decay Bc → Ds*γ in the Technicolor with a Massless Scalar Doublet Model
Radiative Decay Bc → Ds*γ in the Technicolor with a Massless Scalar Doublet Model作者机构：Department of Physics Zhejiang University Hangzhou 310027 China Department of Physics Zhejiang University Hangzhou 310027 China
出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)
年 卷 期：2002年第38卷第7期
页 面：47-52页
核心收录：
主 题：perturbative QCD, technicolor, massless scalar doublet model
摘 要：Applying perturbative QCD, we study the process Bc → Dsγ in the technicolor with a massless scalar doublet model (TCMLSM). There are mainly two mechanisms contributing to the Bc → D*sγ process. One proceeds through the short distance b → sγ transition and the other through weak annihilation accompanied by a photon *** find that, compared with the standard model, the modification of Bc → D*sγ from πρ (the physical pions in the TCMLSM) is so small that can be neglected for the allowed mass ofπρ. The weak-annihilation contribution is found to be about one order larger than that of the electromagnetic penguin diagrams.
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