Measurements of tt̅ 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

Rimoldi, Marco; Mullier, Geoffrey; Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Meloni, Federico; Beck, Hans Peter; Ereditato, Antonio (2018). Measurements of tt̅ 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 - particles, fields, gravitation, and cosmology, 98(1) American Physical Society 10.1103/PhysRevD.98.012003

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Measurements are made of differential cross-sections of highly boosted pair-produced top quarks as a function of top-quark and tt̅ system kinematic observables using proton-proton collisions at a center-of-mass energy of √s = 13 TeV. The data set corresponds to an integrated luminosity of 36.1fb⁻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 pT > 500 GeV and a second with pT > 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 phasespace, and are compared to several Monte Carlo simulations by means of calculated χ² values. The cross-section for tt̅ production in the fiducial phase-space region is 292 ± 7 (stat) ± 71 (syst) fb, to be compared to the theoretical prediction of 384 ± 36 fb.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Haug, Sigve; Weber, Michael and Beck, Hans Peter

Subjects:

500 Science > 530 Physics

ISSN:

1550-7998

Publisher:

American Physical Society

Language:

English

Submitter:

BORIS Import LHEP

Date Deposited:

26 Jun 2019 10:56

Last Modified:

23 Oct 2019 16:30

Publisher DOI:

10.1103/PhysRevD.98.012003

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt

BORIS DOI:

10.7892/boris.129077

URI:

https://boris.unibe.ch/id/eprint/129077

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