The paper derives the one- and two-loop top quark CEDM induced by a CP-violating ALP at q^2 = m_t^2 and uses it to set new bounds on the ALP-top coupling, with the neutron EDM giving the strongest of the three new limits.
Production of Singlet dominated scalar(s) at the LHC
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abstract
The leading order production of an SM singlet-like scalar has primarily been realized through the gluon fusion process by mixing with the $SU(2)_L$ scalar doublet of the model. The dominant part of the physical state, i.e., the singlet component, does not have any role in its direct production. Focusing on such a state with a mass smaller than the SM-like Higgs scalar, we calculate the dominant next-to-leading (NLO) order corrections to its production cross-section. With these improved cross-sections, the present and future LHC limits may become somewhat more stringent.
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Constraining ALP-Top Interaction from the Chromoelectric Dipole Moment of the Top Quark
The paper derives the one- and two-loop top quark CEDM induced by a CP-violating ALP at q^2 = m_t^2 and uses it to set new bounds on the ALP-top coupling, with the neutron EDM giving the strongest of the three new limits.