Top-philic heavy resonances in four-top final states and their EFT interpretation
Luc Darmé (Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, C.P. 13, Frascati, 00044, Italy); Benjamin Fuks (Institut Universitaire de France, 103 boulevard Saint-Michel, Paris, 75005, France, Sorbonne Université, CNRS, Laboratoire de Physique Théorique et Haute Énergies, LPTHE, Paris, F-75005, France); Fabio Maltoni (Dipartimento di Fisica e Astronomia, Università di Bologna e INFN, Sezione di Bologna, via Irnerio 46, Bologna, I-40126, Italy, Centre for Cosmology, Particle Physics and Phenomenology (CP3), Universitée catholique de Louvain, Louvain-la-Neuve, 1348, Belgium)
With an expected rate of about one event per 100,000 top-quark pairs, four top-quark final states very rarely arise at the LHC. Though scarce, they offer a unique window onto top-quark compositeness, self-interactions and more generically, onto any top-philic new physics. By employing simplified models featuring heavy resonances, we study the range of validity of effective theory interpretations of current four top-quark analyses at the LHC and establish their future reach at the HL-LHC. We find that for the class of models under consideration, the effective field theory interpretations are not applicable. We therefore present the most up-to-date limits obtained from public CMS analyses using simplified models. Finally, we put forward a novel recasting strategy for the experimental results based on the production of top quarks with large transverse momentum.
