论文标题
抑制higgs dimuon衰变
Suppression of the Higgs Dimuon Decay
论文作者
论文摘要
人们经常说,在多基格斯模型中消除了改变树级风味的中性电流,要求给定电荷的所有费米子夫妇送给同一higgs玻色子。 Abe,Sato和Yagyu提供了一个反例,其中具有特定于MUON的两种型双线型,并具有柔和破碎的$ Z_4 $对称性。在此模型中,除了穆恩夫妇到一个希格斯和另一个伴侣外,所有费米子都与另一个。 We study the phenomenology of the model and show that there is a wide range of parameter-space in which the branching ratios of the 125 GeV Higgs are very close to their Standard Model values, with the exception of the branching ratio into muons, which can be substantially suppressed -- this is an interesting possibility, since the current value of this branching ratio is $0.5 \pm 0.7$ times the Standard Model value.我们还研究了带电的希格斯玻色子,并表明,如果它比$ 200 $ gev轻,则可能具有较大的分支比率为$μν$ - 甚至比通常衰减到$τν$的情况大得多。还研究了重中性标量的衰减。该模型的确在125 GEV Higgs的分支比率之间具有关系,可以在$ z $'s,$τ$和$ $ $'中进行关系,可以在将来的加速器中进行测试。
It is often stated that elimination of tree-level flavor-changing neutral currents in multi-Higgs models requires that all fermions of a given charge to couple to the same Higgs boson. A counterexample was provided by Abe, Sato and Yagyu in a muon-specific two-Higgs doublet model with a softly-broken $Z_4$ symmetry. In this model, all fermions except the muon couple to one Higgs and the muon couples to the other. We study the phenomenology of the model and show that there is a wide range of parameter-space in which the branching ratios of the 125 GeV Higgs are very close to their Standard Model values, with the exception of the branching ratio into muons, which can be substantially suppressed -- this is an interesting possibility, since the current value of this branching ratio is $0.5 \pm 0.7$ times the Standard Model value. We also study the charged Higgs boson and show that, if it is lighter than $200$ GeV, it could have a large branching ratio into $μν$ - even substantially larger than the usual decay into $τν$. The decays of the heavy neutral scalars are also studied. The model does have a relationship between the branching ratios of the 125 GeV Higgs into $Z$'s, $τ$'s and $μ$'s, which can be tested in future accelerators.