Bounds on the absorptive parts of the chromomagnetic and chromoelectric dipole moments of the top quark from LHC data
Abstract
Bounds on the absorptive (imaginary) parts of the top quark chromomagnetic μ^t and chromoelectric d^t dipole moments are obtained by reinterpreting the most recent LHC data in top quark pair production. It is found that both limits are of the order of 10-1-10-2 , which are consistent with the standard model prediction of Im [ μ^t] . The effects of the absorptive parts of the top quark dipole moments are also studied via some kinematic distributions of t ¯t production, though no significant deviation from the standard model leading-order contribution is observed. Our bounds can be useful to constrain the parameter space of standard model extensions.
- Publication:
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European Physical Journal Plus
- Pub Date:
- August 2022
- DOI:
- 10.1140/epjp/s13360-022-03113-8
- arXiv:
- arXiv:2109.09978
- Bibcode:
- 2022EPJP..137..925H
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- doi:10.1140/epjp/s13360-022-03113-8