Measurements of Lund subjet multiplicities in 13 TeV proton-proton collisions with the ATLAS detector

ATLAS Collaboration

doi:10.1016/j.physletb.2024.139090

Measurements of Lund subjet multiplicities in 13 TeV proton-proton collisions with the ATLAS detector

ATLAS Collaboration

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Abstract

This Letter presents a differential cross-section measurement of Lund subjet multiplicities, suitable for testing current and future parton shower Monte Carlo algorithms. This measurement is made in dijet events in 140 fb⁻¹ of s=13 TeV proton–proton collision data collected with the ATLAS detector at CERN's Large Hadron Collider. The data are unfolded to account for acceptance and detector-related effects, and are then compared with several Monte Carlo models and to recent resummed analytical calculations. The experimental precision achieved in the measurement allows tests of higher-order effects in QCD predictions. Most predictions fail to accurately describe the measured data, particularly at large values of jet transverse momentum accessible at the Large Hadron Collider, indicating the measurement's utility as an input to future parton shower developments and other studies probing fundamental properties of QCD and the production of hadronic final states up to the TeV-scale.

Original language	English
Article number	139090
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	859
DOIs	https://doi.org/10.1016/j.physletb.2024.139090
State	Published - Dec 2024

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10.1016/j.physletb.2024.139090

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title = "Measurements of Lund subjet multiplicities in 13 TeV proton-proton collisions with the ATLAS detector",

abstract = "This Letter presents a differential cross-section measurement of Lund subjet multiplicities, suitable for testing current and future parton shower Monte Carlo algorithms. This measurement is made in dijet events in 140 fb−1 of s=13 TeV proton{\textendash}proton collision data collected with the ATLAS detector at CERN's Large Hadron Collider. The data are unfolded to account for acceptance and detector-related effects, and are then compared with several Monte Carlo models and to recent resummed analytical calculations. The experimental precision achieved in the measurement allows tests of higher-order effects in QCD predictions. Most predictions fail to accurately describe the measured data, particularly at large values of jet transverse momentum accessible at the Large Hadron Collider, indicating the measurement's utility as an input to future parton shower developments and other studies probing fundamental properties of QCD and the production of hadronic final states up to the TeV-scale.",

author = "G. Aad and E. Aakvaag and B. Abbott and K. Abeling and S. Kabana and \{ATLAS Collaboration\}",

note = "Publisher Copyright: {\textcopyright} 2024 CERN for the benefit of the ATLAS Collaboration",

year = "2024",

month = dec,

doi = "10.1016/j.physletb.2024.139090",

language = "English",

volume = "859",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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TY - JOUR

T1 - Measurements of Lund subjet multiplicities in 13 TeV proton-proton collisions with the ATLAS detector

AU - Aad, G.

AU - Aakvaag, E.

AU - Abbott, B.

AU - Abeling, K.

AU - Kabana, S.

AU - ATLAS Collaboration

PY - 2024/12

Y1 - 2024/12

N2 - This Letter presents a differential cross-section measurement of Lund subjet multiplicities, suitable for testing current and future parton shower Monte Carlo algorithms. This measurement is made in dijet events in 140 fb−1 of s=13 TeV proton–proton collision data collected with the ATLAS detector at CERN's Large Hadron Collider. The data are unfolded to account for acceptance and detector-related effects, and are then compared with several Monte Carlo models and to recent resummed analytical calculations. The experimental precision achieved in the measurement allows tests of higher-order effects in QCD predictions. Most predictions fail to accurately describe the measured data, particularly at large values of jet transverse momentum accessible at the Large Hadron Collider, indicating the measurement's utility as an input to future parton shower developments and other studies probing fundamental properties of QCD and the production of hadronic final states up to the TeV-scale.

AB - This Letter presents a differential cross-section measurement of Lund subjet multiplicities, suitable for testing current and future parton shower Monte Carlo algorithms. This measurement is made in dijet events in 140 fb−1 of s=13 TeV proton–proton collision data collected with the ATLAS detector at CERN's Large Hadron Collider. The data are unfolded to account for acceptance and detector-related effects, and are then compared with several Monte Carlo models and to recent resummed analytical calculations. The experimental precision achieved in the measurement allows tests of higher-order effects in QCD predictions. Most predictions fail to accurately describe the measured data, particularly at large values of jet transverse momentum accessible at the Large Hadron Collider, indicating the measurement's utility as an input to future parton shower developments and other studies probing fundamental properties of QCD and the production of hadronic final states up to the TeV-scale.

UR - https://www.scopus.com/pages/publications/85208125110

U2 - 10.1016/j.physletb.2024.139090

DO - 10.1016/j.physletb.2024.139090

M3 - Article

AN - SCOPUS:85208125110

SN - 0370-2693

VL - 859

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 139090

ER -

Measurements of Lund subjet multiplicities in 13 TeV proton-proton collisions with the ATLAS detector

Abstract

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