遍举衰变B→K（*）l+l-与top夸克双Higgs模型

Exclusive Decays B→K~(*)l~+l~- and the Top-quark Two-Higgs Doublet Model

摘要: 在top夸克双Higgs模型(T2HDM)下,利用形状因子光锥求和的新结果,讨论Higgs玻色子对遍举衰变B→K(*)l+l-的分支比和前后不对称的贡献.在所考虑的参数空间内,通过理论计算发现:(1)包括新物理的贡献后,有效Wilson系数中元素A7,A9和A10的符号仍然保持不变.(2)考虑形状因子的误差后,衰变B→K(*)l+l-的分支比能够对荷电Higgs玻色子的质量给出很强的限制,质量大约是350 GeV的荷电Higgs玻色子是实验所允许的.(3)中性Higgs玻色子的效应有可能在衰变B→Kl+l-(l=μ,τ)的前后不对称中观察到.

Abstract: Using the new results of the decay form factors from light-cone sum rules,this paper calculated Higgs bosons contributions to the invariant mass spectrum,and forward-backward asymmetry for the exclusive decays B→K(*)l+l- in the T2HDM.Within the considered parameter space,it was found that:(1)After inclusion of new physics contributions,the signs of the elements of the effective Wilson coeffcients Ai(i=7,9,10)are always SM-like.(2)The charged Higgs boson with a mass around 350 GeV is still allowed by the dat...