## 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.