Measurement of the Soft-Drop Jet Mass in <i>pp</i> Collisions at √<i>s</i>=13 TeV with the ATLAS Detector



Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H, Abreu, H
et al (show 2860 more authors) (2018) Measurement of the Soft-Drop Jet Mass in <i>pp</i> Collisions at √<i>s</i>=13 TeV with the ATLAS Detector. PHYSICAL REVIEW LETTERS, 121 (9). 092001-.

Access the full-text of this item by clicking on the Open Access link.

Abstract

Jet substructure observables have significantly extended the search program for physics beyond the standard model at the Large Hadron Collider. The state-of-the-art tools have been motivated by theoretical calculations, but there has never been a direct comparison between data and calculations of jet substructure observables that are accurate beyond leading-logarithm approximation. Such observables are significant not only for probing the collinear regime of QCD that is largely unexplored at a hadron collider, but also for improving the understanding of jet substructure properties that are used in many studies at the Large Hadron Collider. This Letter documents a measurement of the first jet substructure quantity at a hadron collider to be calculated at next-to-next-to-leading-logarithm accuracy. The normalized, differential cross section is measured as a function of log_{10}ρ^{2}, where ρ is the ratio of the soft-drop mass to the ungroomed jet transverse momentum. This quantity is measured in dijet events from 32.9  fb^{-1} of sqrt[s]=13  TeV proton-proton collisions recorded by the ATLAS detector. The data are unfolded to correct for detector effects and compared to precise QCD calculations and leading-logarithm particle-level Monte Carlo simulations.

Item Type: Article
Additional Information: 13 pages plus author list (31 pages total), 3 figures, published in PRL. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-04/
Uncontrolled Keywords: ATLAS Collaboration
Depositing User: Symplectic Admin
Date Deposited: 19 Sep 2018 09:26
Last Modified: 18 Oct 2023 08:33
DOI: 10.1103/PhysRevLett.121.092001
Open Access URL: https://journals.aps.org/prl/abstract/10.1103/Phys...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3026477