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-.

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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
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
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