LHC Seminar

Top: ATLAS results from rarity to precision

by Josh McFayden (Lawrence Berkeley National Lab. (US))

Video only (CERN)

Video only



The abundant production of top quark events at the LHC allows testing the standard model in unprecedented ways.  The relative probability for W bosons to decay to a muon or a tau-lepton is measured, selecting events in which a top quark pair decays to two opposite-sign leptons plus jets through W bosons. The measurement confirms the universality of tau and muon couplings to the W boson with the highest precision, to date.  In a second analysis, charged leptons are again used to select di- and multi-lepton final states with high jet multiplicity. The kinematic, multiplicity and flavour properties are input to a multivariate discriminant to recognise and establish evidence for the extremely rare production of four top quarks in an event.



Organized by

Michelangelo Mangano, Monica Pepe-Altarelli and Guillaume Unal

There is a live webcast for this event