Measurement of the inclusive and differential t/t cross sections at 13 TeV in the all-jets boosted regime with CMS

Iemmi, Fabio (2016) Measurement of the inclusive and differential t/t cross sections at 13 TeV in the all-jets boosted regime with CMS. [Laurea magistrale], Università di Bologna, Corso di Studio in Fisica [LM-DM270]
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Abstract

The t/t production cross section is measured with the CMS detector in the all-jets channel in $pp$ collisions at the centre-of-mass energy of 13 TeV. The analysis is based on the study of t/t events in the boosted topology, namely events in which decay products of the quark top have a high Lorentz boost and are thus reconstructed in the detector as a single, wide jet. The data sample used in this analysis corresponds to an integrated luminosity of 2.53 fb-1. The inclusive cross section is found to be sigma(t/t) = 727 +- 46 (stat.) +115-112 (sys.) +- 20~(lumi.) pb, a value which is consistent with the theoretical predictions. The differential, detector-level cross section is measured as a function of the transverse momentum of the leading jet and compared to the QCD theoretical predictions. Finally, the differential, parton-level cross section is reported, measured as a function of the transverse momentum of the leading parton, extrapolated to the full phase space and compared to the QCD predictions.

Abstract
Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Iemmi, Fabio
Relatore della tesi
Scuola
Corso di studio
Indirizzo
Curriculum B: Fisica nucleare e subnucleare
Ordinamento Cds
DM270
Parole chiave
top quark,inclusive cross section,differential cross section,13 TeV,LHC,CMS,all-jets,boosted
Data di discussione della Tesi
21 Ottobre 2016
URI

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