ID 70701
Title Transcription
パートン ショウトツ デノ トップ クォーク タイセイセイ ホウカイ ニオケル シュウジョウタイ レプトン ウンドウリョウ ブンプ ト ヒヒョウジュン トップ ソウゴ サヨウ
Title Alternative
Anomalous top-couplings and momentum distributions of the final-lepton from ttbar productions/decays in parton collisions
Author
Ohkuma, Kazumasa Department of Information Science, Fukui University of Technology
Keywords
Hadron colliders
Nonstandard couplings
Top-quark productions
Lepton distributions
Content Type
Departmental Bulletin Paper
Description
We study the momentum distributions of the final-state charged lepton in parton-parton collisions q¯q, gg →
t¯t → +X ( = e or μ), considering their application to actual experimental-data analyses at high-energy
hadron colliders, i.e., Tevatron and Large Hadron Collider (LHC). Assuming general anomalous t¯tg + t¯tgg
and tbW couplings, we derive analytical formulas for the above distributions based on Kawasaki-Shirafuji-Tsai
formalism. We there take into account all the terms on the former-coupling parameters while up to the linear
terms about the latter. We then calculate the lepton energy- and angular-distributions to clarify how they
are affected by the anomalous couplings, and also search, through the total cross sections, for the parameter
range where quadratic (or higher-order) terms of nonstandard QCD couplings can safely be neglected and
consequently we can carry out the optimal-observable analysis properly for estimating the expected statistical
uncertainties in parameter measurements.
Journal Title
徳島大学総合科学部自然科学研究 = Natural Science Research, The University of Tokushima
ISSN
09146385
NCID
AN10065859
Publisher
徳島大学.総合科学部
Volume
24
Issue
4
Start Page
33
End Page
46
Sort Key
33
Published Date
2010-09-29
EDB ID
FullText File
language
jpn
departments
Science and Technology