https://doi.org/10.1140/epjc/s10052-009-1204-y
Regular Article - Theoretical Physics
Search for anomalous top–gluon couplings at LHC revisited
1
Institute of Theoretical Physics, University of Tokushima, Tokushima, 770-8502, Japan
2
Department of Information Science, Fukui University of Technology, Fukui, 910-8505, Japan
* e-mail: ohkuma@fukui-ut.ac.jp
Received:
21
July
2009
Revised:
16
October
2009
Published online:
17
November
2009
Through top-quark pair productions at LHC, we study possible effects of nonstandard top–gluon couplings yielded by SU(3)×SU(2)×U(1) invariant dimension-6 effective operators. We calculate the total cross section and also some distributions for
as functions of two anomalous-coupling parameters, i.e., the chromoelectric and chromomagnetic moments of the top, which are constrained by the total cross section
measured at Tevatron. We find that LHC might give us some chances to observe sizable effects induced by those new couplings.
PACS: 12.38.-t – / 12.38.Bx – / 12.38.Qk – / 12.60.-i – / 14.65.Ha – / 14.70.Dj –
© Springer-Verlag , 2010
