Speaker
Fabian Esser
Description
I will discuss an Effective Field Theory which extends the SM by an Axion-Like Particle (ALP) and particularly focus on the coupling of a light ALP to top quarks.
We use high-energy LHC probes, and examine both the direct probe to this coupling in associated production of a top-pair with an ALP, and the indirect probe through loop-induced gluon fusion to an ALP leading to top pairs. Using the latest LHC Run II data, we provide the best limit on this coupling and furthermore compare these limits with those
obtained from loop-induced couplings in diboson final states.
Authors
Fabian Esser
Maeve Madigan
(Heidelberg University)
Maria Ubiali
Prof.
Veronica Sanz Gonzalez
(Universities of Valencia and Sussex)
