Technicolor corrections on $B_{s,d}\to \gamma \gamma$ decays in QCD factorization

Zhenjun Xiao, Cai-Dian Lü, Wujun Huo

Within the framework of the Top-color-assisted Technicolor (TC2) model, we calculate the new physics contributions to the branching ratios $\calb(B_{s,d} \to γγ)$ and CP violating…