New Physics Effects on Rare Decays B+u→π+e+e-, ρ+e+e- in a Top Quark Two-Higgs-Doublet Model

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2008,（9）
• 页码范围: 696-702
• 页数: 7页
• 语种: 英文

摘要

Using the form factors from light-cone sum rules,we study the branching ratios and forward-backward asymmetries (FBAs) of the exclusive decays B+u→π+e+e- and B+u→ρ+e+e- (e = e,μ) in the standard model (SM) and the top quark two-Higgs-doublet model (T2HDM).From the numerical results,we find that the new physics contributions cannot provide very large enhancement to the branching ratios and the theoretical predictions are in good agreement with the SM ones.The T2HDM effects on FBAs of these decays are small.Precision measurements of the dilepton invariant mass distributions,especially in the lower dilepton mass region,and the FBAs in the decays B+u→π+(ρ+)e+e- will greatly help in discriminating among the SM and the new physics models.