Feasibility study of the forward-backward asymmetry of the e +e- → tt̄ process in all-hadronic decay modes at √s = 500 GeV with the ILD detector

Katsumasa Ikematsu, Akiya Miyamoto, Keisuke Fujii

Research output: Contribution to conferencePaperpeer-review

Abstract

We have studied the measurement accuracy of the forward-backward asymmetry of the e+e- → tt̄ process in the 6-jet mode at √s = 500 GeV with the ILD detector. In the analysis the vertex charges of b-jets were used to distinguisht from t̄ in each event. The distribution of the cosine of the reconstructed polar angle of so identifiedt or t̄ showed a clear forward-backward asymmetry. After the correction for charge misidenti-fication the forward-backward asymmetry was determined to be A t FB = 0.334±0.0079 for 500 fb-1 with the beam polarization combination of P(e+, e-) = (+30%,-80%), demonstrating a very good statistical accuracy (∼ 2%) even in the 6-jet mode.

Original languageEnglish
Pages28-39
Number of pages12
Publication statusPublished - 2009 Dec 1
Externally publishedYes
Event8th General Meeting of the ILC Physics Working Group - Tsukuba, Japan
Duration: 2009 Jan 212009 Jan 21

Other

Other8th General Meeting of the ILC Physics Working Group
CountryJapan
CityTsukuba
Period09/1/2109/1/21

ASJC Scopus subject areas

  • Instrumentation

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