CERN Accelerating science

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Title Top: ATLAS results from rarity to precision
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Author(s) McFayden, Josh (speaker) (Lawrence Berkeley National Lab. (US))
Corporate author(s) CERN. Geneva
Imprint 2020-06-09. - 3524.
Series (LHC Seminar)
Lecture note on 2020-06-09T11:00:00
Subject category LHC Seminar
Abstract

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.

 

 

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Submitted by angela.ricci@cern.ch

 


 Record created 2020-06-09, last modified 2024-06-26


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