KEK素粒子原子核研究所・理論セミナー

分類理論セミナー
開始2015/06/23(火)11:00
終了2015/06/23(火)12:00
会場研究本館1階 会議室3
講演タイトルLepton-flavor-violating Higgs decay $h \rightarrow \mu \tau$ and muon anomalous magnetic moment in a general two Higgs doublet model
講演者戸部和弘(名古屋大学・准教授)
言語英語/English
連絡先山本恵/yamakei-AT-post.kek.jp
ウェブサイト
食堂・売店利用予定なし/0

概要

Abstract:
A two Higgs doublet model (2HDM) is one of the minimal extensions of the standard model (SM), and it is well-known that the general setup predicts the flavor-violating phenomena, mediated by neutral Higgs interactions. Recently the CMS collaboration has reported an excess of the lepton-flavor-violating Higgs decay in $h \rightarrow \mu \tau$ channel with a significance of $2.4 \sigma$. We investigate the CMS excess in a general 2HDM with tree-level flavor changing neutral currents (FCNSs), and discuss its impact on the other physical observations. Especially, we see that the FCNCs relevant to the excess can enhance the neutral Higgs contributions to the muon anomalous magnetic moment (muon g-2), and can resolve the discrepancy between the measured value and the SM prediction. We also find that the couplings to be consistent with the muon g-2 anomaly as well as the CMS excess in $h \rightarrow \mu \tau$ predict the sizable rate of $\tau \rightarrow \mu \gamma$, which is with
in the reach of future B factory.

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