“School of Particles And Accelerator”

Back to Papers Home
Back to Papers of School of Particles And Accelerator

Paper   IPM / Particles And Accelerator / 12537
School of Particles and Accelerator
  Title:   Probing the Anomalous Couplings of the Top Quark with Gluon at the LHC and Tevatron
  Author(s): 
1.  Hoda Hesari
2.  Mojtaba Mohammadi Najafabadi
  Status:   Published
  Journal: Mod. Phys. Lett. A
  No.:  37
  Vol.:  28
  Year:  2013
  Supported by:  IPM
  Abstract:
In this paper, we study the sensitivity of the fraction of t?t events arising from gluon-gluon fusion to the chromoelectric and chromomagnetic dipole moments (CEDM and CMDM) as well as the t?t cross sections at the LHC and Tevatron, and the recently measured charged asymmetry at the LHC. We find that at the Tevatron and the LHC, non-zero values of CMDM could suppress the t?t production rate. It is shown that the ratio of (gg ! t?t)/(p?p ! t?t) at the Tevatron is more sensitive to CEDM and CMDM than the LHC case. The presence of CEDM always increases the contribution of gluon-gluon fusion process in top pair rate at the Tevatron and LHC. Except for a small range of CMDM, the presence of CEDM and CMDM can increase the fraction of gluongluon fusion at the Tevatron and LHC. The measured ratio of (gg ! t?t)/(p?p ! t?t) at the Tevatron is used to derive bounds on the chromoelectric and chromomagnetic dipole moments as well as the cross sections at the LHC and Tevatron, and the measured charged asymmetry at the LHC

Download TeX format
back to top
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
scroll left or right