Abraham, N L, Allbrooke, B M M, Asquith, L, Cerri, A, Chavez Barajas, C A, De Santo, A, Jones, S D, Miano, F, Salvatore, F, Santoyo Castillo, I, Shehu, C Y, Shaw, K, Stevenson, T, Suruliz, K, Sutton, M R, Tresoldi, F, Vivarelli, I, Winkels, E, Winston, O J, The ATLAS Collaboration, and others, (2018) Measurements of tt ¯ differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in pp collisions at s √ =13 TeV using the ATLAS detector. Physical Review D, 98 (1). 12003 1-39. ISSN 2470-0010

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Abstract

Measurements are made of differential cross-sections of highly boosted pair-produced top quarks as a function of top-quark and tt ¯ system kinematic observables using proton--proton collisions at a center-of-mass energy of s √ =13TeV. The data set corresponds to an integrated luminosity of 36.1 fb −1, recorded in 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. Events with two large-radius jets in the final state, one with transverse momentum p T >500 GeV and a second with p T >350 GeV, are used for the measurement. The top-quark candidates are separated from the multijet background using jet substructure information and association with a b -tagged jet. The measured spectra are corrected for detector effects to a particle-level fiducial phase space and a parton-level limited phase space, and are compared to several Monte Carlo simulations by means of calculated χ 2 values. The cross-section for tt ¯ production in the fiducial phase-space region is 292±7 (stat)±76(syst) fb, to be compared to the theoretical prediction of 384±36 fb.

Item Type:	Article
Schools and Departments:	School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups:	Experimental Particle Physics Research Group
Subjects:	Q Science > QC Physics
Depositing User:	Alice Jackson
Date Deposited:	09 Nov 2018 15:36
Last Modified:	12 Nov 2018 15:04
URI:	http://srodev.sussex.ac.uk/id/eprint/80106

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