De Santo, Antonella, Salvatore, Fabrizio, Cerri, Alessandro, Vivarelli, Iacopo, Asquith, Lily, Allbrooke, Benedict, Chavez Barajas, Carlos, Santoyo Castillo, Itzebelt, Potter, Tina, Suruliz, Kerim, Sutton, Mark and others, (ATLAS collaboration) (2015) Measurement of the top pair production cross section in 8 TeV proton-proton collisions using kinematic information in the lepton+jets final state with ATLAS. Physical Review D, 91 (11). p. 112013. ISSN 1550-7998

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Abstract

A measurement is presented of the tt¯ inclusive production cross section in pp collisions at a center-of-mass energy of s√=8  TeV using data collected by the ATLAS detector at the CERN Large Hadron Collider. The measurement was performed in the lepton+jets final state using a data set corresponding to an integrated luminosity of 20.3  fb−1. The cross section was obtained using a likelihood discriminant fit and b-jet identification was used to improve the signal-to-background ratio. The inclusive tt¯ production cross section was measured to be 260±1(stat)+22−23(stat)±8(lumi)±4(beam)  pb assuming a top-quark mass of 172.5 GeV, in good agreement with the theoretical prediction of 253+13−15  pb. The tt¯→(e,μ)+jets production cross section in the fiducial region determined by the detector acceptance is also reported.

Item Type:	Article
Schools and Departments:	School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects:	Q Science Q Science > QC Physics
Depositing User:	Sinead Rance
Date Deposited:	16 Sep 2015 13:58
Last Modified:	03 Jul 2019 00:05
URI:	http://sro.sussex.ac.uk/id/eprint/56790

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