Measurement of the soft-drop jet mass in pp collisions at √s=13 TeV with the ATLAS detector

doi:10.1103/PhysRevLett.121.092001

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DOI Доступ к ресурсу на сайте издателя			10.1103/PhysRevLett.121.092001

#ATLAS, детектор

#Большой адронный коллайдер

#протон-протонные столкновения

Title: Measurement of the soft-drop jet mass in pp collisions at √s=13 TeV with the ATLAS detector
Creator: Aad, G.
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Abbott, B.
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Chelkov, G. A.
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Khodinov, A.
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Tsybychev, D.
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Vaniachine, A.
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Aaboud, M.
Date: 2018
DOI: 10.1103/PhysRevLett.121.092001
Description: 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 log10ρ2, 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 √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.