Four Tops for LHC

EZEQUIEL ALVAREZ; DARIUS FAROUGHY; JERNEJ KAMENIK; ROBERTO MORALES; ALEJANDRO SZYNKMAN

NUCLEAR PHYSICS B

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2016

0550-3213

We design a search strategy for the Standard Model tt̄tt̄ production at the LHC inthe same-sign dilepton and trilepton channels. We study dierent signal features and,given the small expected number of signal events, we scrutinize in detail all reducibleand irreducible backgrounds. Our analysis shows that by imposing a set of basic jetand lepton selection criteria, the SM pp → tt̄tt̄ process could be evidenced in the nearfuture, within Run-II, when combining both multi-lepton search channels. We arguethat this search strategy should also be used as a guideline to test New Physics couplingpredominantly to top-quarks. In particular, we show that a non-resonant New Physicsenhancement of the four-top nal state would be detectable through this search strategy.We study two top-philic simplied models of this kind, a neutral scalar boson and a Z 0 ,and present current and future exclusion limits on their mass and couplings.