KEK素粒子原子核研究所・理論セミナー/大道竜次氏

分類理論セミナー
開始2018/01/16(火)11:00
終了2018/01/16(火)12:00
会場Kenkyu-Honkan 3F, Seminar Room
講演タイトルEnhanced axion-photon coupling in a GUT with hidden photon
講演者Mr. Ryuji Daido(Tohoku University)
言語英語/English
連絡先川名清晴/kawana-AT-post.kek.jp
ウェブサイト
食堂・売店利用予定なし/0

概要

  ABSTRACT

We first review current status of QCD axion searches, which generically

rely on interaction between the axion and SM photon.

Next, we show that the axion-photon coupling is modified in the presence

of massless hidden photon which has kinetic mixing with the SM photon. If

the kinetic mixing and hidden gauge coupling are \mathcal{O}(1), the

axion-photon coupling becomes several tens of times larger.

Finally, we consider QCD axion in SU(5) GUT with massless hidden photon.

Gauge coupling unification is determined by the size of kinetic mixing

only, and requires relatively large kinetic mixing, which is naturally

generated when hidden gauge coupling is large. We find enhancement factor

of axion-photon coupling is about 20 in our model.

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