Measurement of jet track functions in pp collisions at s=13 TeV with the ATLAS detector

The ATLAS collaboration

doi:10.1016/j.physletb.2025.139680

Measurement of jet track functions in pp collisions at s=13 TeV with the ATLAS detector

The ATLAS collaboration

Aix-Marseille Université
University of Bergen
University of Oklahoma
New York University
Georg August Universität Göttingen
pro3dure medical GmbH
Brookhaven National Laboratory Physics Department
Southern Methodist University
University Mohammed V in Rabat
Tel Aviv University
Technion - Israel Institute of Technology
New York University
Sezione INFN di Roma La Sapienza
ICTP
Heidelberg University
Laboratoire d’Annecy-Le-Vieux de Physique des Particules (CNRS/IN2P3/LAPP)
Univ of Mining and Metallurgy
Brandeis University
University of Manchester
USA
Istanbul University
Rutherford Appleton Laboratory
University of California at Santa Cruz
University of Chicago
Dept. d'Estructura I Constituents De La Matèria and IFAE
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
University of Pavia
Johannes Gutenberg University
'Al. I. Cuza' University
European Organization for Nuclear Research
McGill University and Génome Québec Innovation Centre
University of London
Zhengzhou University
INFN Sezione di Roma Tor Vergata
University of Rome Tor Vergata
University of Valencia
Hassan II University of Casablanca
Lund University
Waseda University
University of Bonn
Bogazici University
Columbia University
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
University of Victoria
INFN, Laboratori Nazionali Di Frascati
University of Grenoble Alpes
University of Edinburgh
Oklahoma State University
Max-Planck-Institut für Physik
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Technical University of Athens
University of Geneva
University of Warwick
Czech Technical University in Prague
Department of Physics, Lancaster University
California State University
University of Liverpool
University of Johannesburg
INFN Sezione di Milano
University Paris-Sud
University of Sussex
Universidad Técnica Federico Santa María
University of Birmingham
INFN Sezione di Napoli
Università di Napoli Federico II
National University of La Plata
University of Washington
Universidad Autónoma de Madrid
Federal University of Rio de Janeiro
University of Munich
University of Michigan, Ann Arbor
University of Freiburg
University of Toronto
LIP - Lisboa
Aristotle University of Thessaloniki
High Energy Accelerator Research Organization (KEK)
University of Oslo
University of Sheffield
University of Texas at Austin
University of Glasgow
Stockholm University
Oskar Klein Centre
University of Milan
University of Athens
SNS and INFN
SUNY
University of Tokyo
Deutsches Elektronen-Synchrotron (DESY)
Humboldt-Universität zu Berlin
Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
Duke University
Université de Montréal
Universita La Sapienza
Nagoya University
Ochanomizu University
Comenius University
University of California, Irvine
University of Cape Town
University of Illinois at Urbana-Champaign
Mohammed VI Polytechnic University
University of Pennsylvania School of Arts and Sciences
Institute of Experimental Physics Slovak Academy of Sciences
Carleton University
Technische Universität Dresden
University of Oregon
Queen Mary University of London
Yale University
University of Belgrade
University of Texas at Arlington
DIBINEM, Alma Mater Studiorum, University of Bologna
University of Cambridge
United Arab Emirates University
University of Pittsburgh
School of Physics
University of Genova
Sezione INFN di Genova
University of Amsterdam
Stanford University
Joint Laboratory of Optics
University of Science and Technology of China
University of Oxford
University College London
Institute of High Energy Physics Chinese Academy of Science
TRIUMF
University of British Columbia
University of Siegen
University of Innsbruck
Ciudad Universitaria Pab. 1
Centre de Recherche Institut du Cerveau et de la Moelle
Tufts University
University of Bern
Istinye University
State University of Rio de Janeiro
Broad Institute of Harvard University
Uppsala University
Lawrence Berkeley National Laboratory
Institut de Neurosciences de la Timone, Centre National de la Recherche Scientifique - Aix-Marseille University
Charles University
University of Würzburg
University of Gaziantep
Weizmann Institute of Science Israel
Universite della Calabria
LAIC, Université d'Auvergne
Ohio State University
Bergische Universität Wuppertal
University of Massachusetts Amherst
INFN-TIFPA
University of Trento
Michigan State University
York University
Simon Fraser University
Boston University
Justus-Liebig-Universität Gießen
University of Chinese Academy of Sciences
Nanjing University
Ankara University School of Medicine
Indiana University Bloomington
University of Pisa
Niels Bohr Institutet
Radboud University Nijmegen
PT Government Associated Laboratory, University of Minho
Universidad Nacional de Colombia
Istituto Nazionale di Fisica Nucleare, Sezione di Lecce
University of Salento
Universidade Federal de Juiz de Fora
Tbilisi State University
Argonne National Laboratory
Shanghai Jiao Tong University
Faculty of Science
Tsinghua University
University of Wisconsin
Chinese University of Hong Kong
University of Arizona
National Tsing Hua University
Institute of Physics of the Czech Academy of Sciences
Univ. of Ljubljana
Univ.́ degli Studi di Udine
Instituto Superior Técnico
Academia Sinica Taipei
Sez. di Roma Tre
Pontificia Universidad Católica de Chile
Millennium Institute for Subatomic physics at high energy frontier (SAPHIR)
University of Bucharest
Federal University of Bahia
Université Ibn-Tofail
University of Lisboa
University of Hong Kong
Louisiana Tech University
Shandong University
Centro Nacional de Microelectrónica (IMB-CNM-CSIC)
Coimbra University Pó lo II
University of the Philippines Diliman (Philippines)
University of Sharjah
University of Adelaide
Iowa University
University of New Mexico
NCSR Demokritos
Jagiellonian University
University of Alberta
University of the Witwatersrand, Johannesburg
University of Georgia
West University in Timisoara
A.I. Alikhanyan National Science Laboratory (YerPhi)
Shinshu University
Osaka University
Tsukuba University
University Politehnica of Bucharest
Azerbaijan Academy of Sciences
University of São Paulo
University of Texas at Dallas
Iv. Javakhishvili Tbilisi State University
Tokyo Institute of Technology
Universidad de Tarapacá
Iowa State University
University Andrés Bello
Kobe University
Center for Autonomous Systems
Hong Kong University of Science and Technology
Sun Yat-Sen University
Centro de Física Nuclear Universidade de Lisboa
Kyushu University
University Mohammed I
Universidad Antonio Nariño
University of Sydney
Transilvania University of Brasov
National Institute for R&D of Isotopic and Molecular Technologies
Universidad de la Serena in la Serena
TOBB University of Economics and Technology
University of California at Berkeley

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Abstract

Measurements of jet substructure are key to probing the energy frontier at colliders, and many of them use track-based observables which take advantage of the angular precision of tracking detectors. Theoretical calculations of track-based observables require ‘track functions’, which characterize the transverse momentum fraction r_q carried by charged hadrons from a fragmenting quark or gluon. This letter presents a direct measurement of r_q distributions in dijet events from the 140 fb⁻¹ of proton–proton collisions at s=13 TeV recorded with the ATLAS detector. The data are corrected for detector effects using machine-learning methods. The scale evolution of the moments of the r_q distribution is sensitive to non-linear renormalization group evolution equations of QCD, and is compared with analytic predictions. When incorporated into future theoretical calculations, these results will enable a precision program of theory-data comparison for track-based jet substructure observables.

Original language	English
Article number	139680
Journal	Physics Letters B
Volume	868
DOIs	https://doi.org/10.1016/j.physletb.2025.139680
State	Published - Sep 2025
Externally published	Yes

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10.1016/j.physletb.2025.139680

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@article{04f2f2273d4845549e8570dba7093710,

title = "Measurement of jet track functions in pp collisions at s=13 TeV with the ATLAS detector",

abstract = "Measurements of jet substructure are key to probing the energy frontier at colliders, and many of them use track-based observables which take advantage of the angular precision of tracking detectors. Theoretical calculations of track-based observables require {\textquoteleft}track functions{\textquoteright}, which characterize the transverse momentum fraction rq carried by charged hadrons from a fragmenting quark or gluon. This letter presents a direct measurement of rq distributions in dijet events from the 140 fb−1 of proton–proton collisions at s=13 TeV recorded with the ATLAS detector. The data are corrected for detector effects using machine-learning methods. The scale evolution of the moments of the rq distribution is sensitive to non-linear renormalization group evolution equations of QCD, and is compared with analytic predictions. When incorporated into future theoretical calculations, these results will enable a precision program of theory-data comparison for track-based jet substructure observables.",

author = "\{The ATLAS collaboration\} and G. Aad and E. Aakvaag and B. Abbott and S. Abdelhameed and K. Abeling and Abicht, \{N. J.\} and Abidi, \{S. H.\} and M. Aboelela and A. Aboulhorma and H. Abramowicz and H. Abreu and Y. Abulaiti and Acharya, \{B. S.\} and A. Ackermann and \{Adam Bourdarios\}, C. and L. Adamczyk and Addepalli, \{S. V.\} and Addison, \{M. J.\} and J. Adelman and A. Adiguzel and T. Adye and Affolder, \{A. A.\} and Y. Afik and Agaras, \{M. N.\} and J. Agarwala and A. Aggarwal and C. Agheorghiesei and F. Ahmadov and Ahmed, \{W. S.\} and S. Ahuja and X. Ai and G. Aielli and A. Aikot and \{Ait Tamlihat\}, M. and B. Aitbenchikh and M. Akbiyik and {\AA}kesson, \{T. P.A.\} and Akimov, \{A. V.\} and D. Akiyama and Akolkar, \{N. N.\} and S. Aktas and \{Al Khoury\}, K. and Alberghi, \{G. L.\} and J. Albert and P. Albicocco and Albouy, \{G. L.\} and S. Alderweireldt and Alegria, \{Z. L.\} and L. Heinrich and E. Kourlitis",

note = "Publisher Copyright: {\textcopyright} 2025 CERN for the benefit of the ATLAS Collaboration",

year = "2025",

month = sep,

doi = "10.1016/j.physletb.2025.139680",

language = "English",

volume = "868",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Measurement of jet track functions in pp collisions at s=13 TeV with the ATLAS detector

AU - The ATLAS collaboration

AU - Aad, G.

AU - Aakvaag, E.

AU - Abbott, B.

AU - Abdelhameed, S.

AU - Abeling, K.

AU - Abicht, N. J.

AU - Abidi, S. H.

AU - Aboelela, M.

AU - Aboulhorma, A.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Ackermann, A.

AU - Adam Bourdarios, C.

AU - Adamczyk, L.

AU - Addepalli, S. V.

AU - Addison, M. J.

AU - Adelman, J.

AU - Adiguzel, A.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agaras, M. N.

AU - Agarwala, J.

AU - Aggarwal, A.

AU - Agheorghiesei, C.

AU - Ahmadov, F.

AU - Ahmed, W. S.

AU - Ahuja, S.

AU - Ai, X.

AU - Aielli, G.

AU - Aikot, A.

AU - Ait Tamlihat, M.

AU - Aitbenchikh, B.

AU - Akbiyik, M.

AU - Åkesson, T. P.A.

AU - Akimov, A. V.

AU - Akiyama, D.

AU - Akolkar, N. N.

AU - Aktas, S.

AU - Al Khoury, K.

AU - Alberghi, G. L.

AU - Albert, J.

AU - Albicocco, P.

AU - Albouy, G. L.

AU - Alderweireldt, S.

AU - Alegria, Z. L.

AU - Heinrich, L.

AU - Kourlitis, E.

PY - 2025/9

Y1 - 2025/9

N2 - Measurements of jet substructure are key to probing the energy frontier at colliders, and many of them use track-based observables which take advantage of the angular precision of tracking detectors. Theoretical calculations of track-based observables require ‘track functions’, which characterize the transverse momentum fraction rq carried by charged hadrons from a fragmenting quark or gluon. This letter presents a direct measurement of rq distributions in dijet events from the 140 fb−1 of proton–proton collisions at s=13 TeV recorded with the ATLAS detector. The data are corrected for detector effects using machine-learning methods. The scale evolution of the moments of the rq distribution is sensitive to non-linear renormalization group evolution equations of QCD, and is compared with analytic predictions. When incorporated into future theoretical calculations, these results will enable a precision program of theory-data comparison for track-based jet substructure observables.

AB - Measurements of jet substructure are key to probing the energy frontier at colliders, and many of them use track-based observables which take advantage of the angular precision of tracking detectors. Theoretical calculations of track-based observables require ‘track functions’, which characterize the transverse momentum fraction rq carried by charged hadrons from a fragmenting quark or gluon. This letter presents a direct measurement of rq distributions in dijet events from the 140 fb−1 of proton–proton collisions at s=13 TeV recorded with the ATLAS detector. The data are corrected for detector effects using machine-learning methods. The scale evolution of the moments of the rq distribution is sensitive to non-linear renormalization group evolution equations of QCD, and is compared with analytic predictions. When incorporated into future theoretical calculations, these results will enable a precision program of theory-data comparison for track-based jet substructure observables.

UR - https://www.scopus.com/pages/publications/105010226419

U2 - 10.1016/j.physletb.2025.139680

DO - 10.1016/j.physletb.2025.139680

M3 - Article

AN - SCOPUS:105010226419

SN - 0370-2693

VL - 868

JO - Physics Letters B

JF - Physics Letters B

M1 - 139680

ER -

Measurement of jet track functions in pp collisions at s=13 TeV with the ATLAS detector

Abstract

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