论文标题
$ b_s \toμ^+μ^ - $在两吉格斯 - doublet型号中，带有风味的Yukawa耦合
$B_s \to μ^+ μ^-$ in a Two-Higgs-Doublet Model with flavour-changing up-type Yukawa couplings
论文作者
论文摘要
我们提出了一个两-higgs-doublet模型，其中夸克Yukawa矩阵的结构受三个激励措施打破夸克Yukawa部门的风味对称性的控制。该模型自然抑制了倾斜扇形中改变风味的中性电流（FCNC）幅度，但允许在UP扇区中进行相当大的FCNC耦合。我们计算出$ b_s \至μ^+μ^ - $的分支率，以QCD的领先顺序和临时领先的顺序，其中具有fcnc的fcnc耦合，将重的中性higgs玻色子的fcnc耦合到增强夸克夸克，并验证了所有对抗模式，遵循了Yukawa Matsricions Matsrices spurion explentim sperferms的模式。我们发现$ b_s \与μ^+μ^ - $，$ b \ tosγ$与higgs群众之间的相关性。 $ b_s- \ bar b_s $混合振幅自然会在模型中抑制，但可以用非常重的希格斯玻色子探测一部分参数空间。
We present a Two-Higgs-Doublet Model in which the structure of the quark Yukawa matrices is governed by three spurions breaking the flavour symmetries of the quark Yukawa sector. The model naturally suppresses flavour-changing neutral current (FCNC) amplitudes in the down-type sector, but permits sizable FCNC couplings in the up sector. We calculate the branching ratio of $B_s \to μ^+ μ^-$ to leading and next-to-leading order of QCD for the case with FCNC couplings of the heavy neutral Higgs bosons to up-type quarks and verify that all counterterms follow the pattern dictated by the spurion expansion of the Yukawa matrices. We find correlations between $B_s \to μ^+ μ^-$, $b\to sγ$, and the Higgs masses. The $B_s - \bar B_s$ mixing amplitude is naturally suppressed in the model but can probe a portion of the parameter space with very heavy Higgs bosons.
