Abstract
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).
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the ILC Physics Working Group Meetings at KEK in the Period from May 2007 to June 2009 |
| Pages | 40-49 |
| Number of pages | 10 |
| Publication status | Published - 2009 |
| Externally published | Yes |
| Event | 8th General Meeting of the ILC Physics Working Group - Tsukuba, Japan Duration: Jan 21 2009 → Jan 21 2009 |
Other
| Other | 8th General Meeting of the ILC Physics Working Group |
|---|---|
| Country | Japan |
| City | Tsukuba |
| Period | 1/21/09 → 1/21/09 |
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ASJC Scopus subject areas
- Instrumentation
Cite this
A study of top-quark Yukawa coupling measurement in e+e - → tt̄ H at √s = 500 GeV. / Yonamine, Ryo; Ikematsu, Katsumasa; Uozumi, Satoru; Fujii, Keisuke.
Proceedings of the ILC Physics Working Group Meetings at KEK in the Period from May 2007 to June 2009. 2009. p. 40-49.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - A study of top-quark Yukawa coupling measurement in e+e - → tt̄ H at √s = 500 GeV
AU - Yonamine, Ryo
AU - Ikematsu, Katsumasa
AU - Uozumi, Satoru
AU - Fujii, Keisuke
PY - 2009
Y1 - 2009
N2 - 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).
AB - 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).
UR - http://www.scopus.com/inward/record.url?scp=84893453938&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84893453938&partnerID=8YFLogxK
M3 - Conference contribution
SP - 40
EP - 49
BT - Proceedings of the ILC Physics Working Group Meetings at KEK in the Period from May 2007 to June 2009
ER -