A study of top-quark Yukawa coupling measurement in e+e - → tt̄ H at √s = 500 GeV

Ryo Yonamine, Katsumasa Ikematsu, Satoru Uozumi, Keisuke Fujii

研究成果: Paper査読

抄録

We report on the feasibility of measuring the top Yukawa coupling in the process: e+e- → tt̄ H. This measurement is crucial to test the mass generation mechanism for matter particles. Since the cross section for this process attains its maximum around √s = 700 GeV, most of the past studies were done assuming this energy region. It has been pointed out, however, that the QCD threshold correction enhances the cross section significantly and might enable its measurement at √s = 500 GeV, which will be accessible already in the first phase of the ILC project. We have implemented this threshold enhancement into our tt̄ H event generator and carried out Monte Carlo simulations. Our results show that tt̄ H events can be observed with a significance of 4.1σ with no beam polarization and 5.4 σ with the e- and e+ beam polarization combination: (-0.8, +0.3).

本文言語English
ページ40-49
ページ数10
出版ステータスPublished - 2009 12月 1
外部発表はい
イベント8th General Meeting of the ILC Physics Working Group - Tsukuba, Japan
継続期間: 2009 1月 212009 1月 21

Other

Other8th General Meeting of the ILC Physics Working Group
国/地域Japan
CityTsukuba
Period09/1/2109/1/21

ASJC Scopus subject areas

  • 器械工学

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