학술논문
Measurements of t(t)over-bar differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in pp collisions at root s=13 Te V using the ATLAS detector
Document Type
Author
Abulaiti, Yiming; Åkerstedt, Henrik; Bertoli, Gabriele; Bessidskaia Bylund, Olga; Bohm, Christian; Carney, Rebecca M. D.; Clément, Christophe; Cribbs, Wayne A.; Gellerstedt, Karl; Hellman, Sten; Jon-And, Kerstin; Milstead, David A.; Moa, Torbjörn; Molander, Simon; Shaikh, Nabila W.; Shcherbakova, Anna; Silverstein, Samuel B.; Sjölin, Jörgen; Strandberg, Sara; Ughetto, Michaël; Valdes Santurio, Eduardo; Wallängen, Veronica
Source
Physical Review D. 98(1)
Subject
Language
English
ISSN
2470-0010
2470-0029
2470-0029
Abstract
Measurements are made of differential cross-sections of highly boosted pair-produced top quarks as a function of top-quark and t (t) over bar system kinematic observables using proton-proton collisions at a center-of-mass energy of root s = 13 TeV. 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 chi(2) values. The cross-section for t (t) over bar production in the fiducial phase-space region is 292 +/- 7(stat) +/- 71(syst) tb, to be compared to the theoretical prediction of 384 +/- 36 fb.