Measurement of the Splitting Function in pp and Pb-Pb Collisions at sNN =5.02 TeV

CMS Collaboration

doi:10.1103/PhysRevLett.120.142302

Measurement of the Splitting Function in pp and Pb-Pb Collisions at sNN =5.02 TeV

CMS Collaboration

Yerevan Physics Institute
Institut für Hochenergiephysik
Université Paris-Saclay
Institute for Nuclear Problems of Belarusian State University
University of Antwerp
Imperial College London
Vrjie Universiteit Brussel
Université Libre de Bruxelles
University of Campinas (UNICAMP)
Ghent University
Universidade Federal de Pelotas
University of Louvain
Université de Mons
Centro Brasileiro de Pesquisas Fisicas
Rua São Francisco de Xavier
Institute for Theoretical and Experimental Physics
São Paulo State University
Federal University of ABC (UFABC)
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
University of Sofia
Beihang University
Joint Institute for Nuclear Research, Dubna
Institute of High Energy Physics, Chinese Academy of Sciences
Tsinghua University
Universidad de Los Andes, Colombia
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split
Faculty of Science, University of Split
Ruđer Bošković Institute
Helwan University
University of Cyprus
Charles University
Zewail City of Science and Technology
Universidad San Francisco de Quito
Egyptian Network of High Energy Physics
Fayoum University
British University in Egypt
Ain Shams University
Université de Haute Alsace
Moscow State University
National Institute of Chemical Physics and Biophysics, Tallinn
University of Helsinki
Helsinki Institute of Physics
LUT University
Université de Strasbourg
European Organization for Nuclear Research
Université Paris-Sud
IGFL, Université de Lyon, Université Lyon 1
RWTH Aachen University
Georgian Technical University
Tbilisi State University
Universität Hamburg
c/o DESY
Joint Faculty of the Brandenburg University of Technology Cottbus Senftenberg
Eötvös Loránd University
Institute of Nuclear Research ATOMKI
Universität Karlsruhe/Forschungszentrum Karlsruhe
NCSR Demokritos
University of Athens
National Technical University of Athens
University of Ioannina
University of Debrecen
Wigner Research Centre for Physics
Institute of Physics Bhubaneswar
University of Visva-Bharati
Indian Institute of Science
National Institute of Science Education and Research
University of Ruhuna
Isfahan University of Technology
Panjab University
University of Delhi
Saha Institute of Nuclear Physics
Indian Institute of Technology Madras
Bhabha Atomic Research Centre
Tata Institute of Fundamental Research, Mumbai
Yazd University
Islamic Azad University, Science and Research Branch
Indian Institute of Science Education and Research (IISER)
Institute for Research in Fundamental Sciences (IPM)
University of Siena
University of Milano-Bicocca
Purdue University
University College Dublin
INFN Sezione di Bari
Università degli studi di Bari Aldo Moro
Politecnico di Bari
INFN Sezione di Bologna
University of Bologna
INFN Sezione di Catania
Università degli Studi di Catania
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
University of Florence
International Islamic University of Malaysia
LNF-INFN
Sezione di Genova
University of Genoa
INFN Sezione di Milano-Bicocca
MOSTI
INFN Sezione di Napoli
Università degli Studi della Basilicata
Università G. Marconi
University of Naples Federico II
INFN
University of Padova
INFN Sezione di Pavia
University of Pavia
Università di Trento
INFN Sezione di Perugia
University of Perugia
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
University of Pisa
Scuola Normale Superiore di Pisa
Consejo Nacional de Ciencia y Tecnología
Sezione di Roma
University of Rome
INFN Sezione di Torino
University of Turin
Laboratory of Molecular Pathology
INFN Sezione di Trieste
University of Trieste
Kyungpook National University
Chonbuk National University
Chonnam National University
Hanyang University
Korea University
Seoul National University
University of Seoul
Sungkyunkwan University
Vilnius University
University Malaya
Warsaw University of Technology
Institute for Nuclear Research of the Russian Academy of Sciences
CINVESTAV-IPN
National Research Nuclear University MEPhI
Universidad Iberoamericana
Benemerita Universidad Autonoma de Puebla
Universidad Autónoma de San Luis Potosi
University of Auckland
University of Canterbury
Quaid-i-Azam University
National Centre for Nuclear Research
University of Warsaw
St. Petersburg State Polytechnical University
Lisboa
University of Florida
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Petersburg Nuclear Physics Institute (PNPI)
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
University of Belgrade
Moscow Institute of Physics and Technology
University of Belgrade
Novosibirsk State University
Scuola Normale e Sezione dell'Infn
Kurchatov Institute
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT)
Universidad Autónoma de Madrid
University of Oviedo
CSIC-Univ. Cantabria
Riga Technical University
University of Zurich
Stefan Meyer Institute for Subatomic Physics (SMI)
Adiyaman University
Vienna University of Technology
Paul Scherrer Institut
Istanbul Aydin University
ETH Zurich
Mersin University
National Central University
National Taiwan University
Chulalongkorn University
Cukurova University
Cag University
Piri Reis University
Izmir Institute of Technology
Necmettin Erbakan University
Marmara University
Middle East Technical University (METU)
Kafkas University
Istanbul Bilgi University
Bogazici University
CCLRC Rutherford Appleton Laboratory
University of Southampton
Instituto de Astrofisica de Canarias
Istanbul Technical University
Academy of Science of Ukraine
Kharkov Institute of Physics and Technology
University of Bristol
Utah Valley University
Beykent University
Bingol University
Brunel University London
Baylor University
Catholic University of America
University of Alabama
Boston University
Women and Infants Hospital of Rhode Island-Warren Alpert Medical School of Brown University
University of California, Davis
University of California, Los Angeles
University of California, Riverside
University of California, San Diego
Erzincan University
University of California, Santa Barbara
California Institute of Technology
Carnegie Mellon University
University of Colorado Boulder
Cornell University
Fermi National Accelerator Laboratory
Florida International University
Florida State University
Florida Institute of Technology
University of Illinois at Chicago
University of Iowa
Sinop University
Mimar Sinan University
Texas A&M University at Qatar
Johns Hopkins University
University of Kansas
Kansas State University
Lawrence Livermore National Laboratory
University of Maryland, College Park
Massachusetts Institute of Technology
University of Minnesota Twin Cities
University of Mississippi
University of Nebraska-Lincoln
University at Buffalo, The State University of New York
Northeastern University
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University of Notre Dame
The Ohio State University
Princeton University
University of Puerto Rico
Purdue University Northwest
Rice University
University of Rochester
The Rockefeller University
Rutgers University–New Brunswick
University of Tennessee
Texas A&M University
Texas Tech University
Vanderbilt University
University of Virginia
Wayne State University
University of Wisconsin-Madison

Research output: Contribution to journal › Article › peer-review

128 Citations (Scopus)

Abstract

Data from heavy ion collisions suggest that the evolution of a parton shower is modified by interactions with the color charges in the dense partonic medium created in these collisions, but it is not known where in the shower evolution the modifications occur. The momentum ratio of the two leading partons, resolved as subjets, provides information about the parton shower evolution. This substructure observable, known as the splitting function, reflects the process of a parton splitting into two other partons and has been measured for jets with transverse momentum between 140 and 500 GeV, in pp and PbPb collisions at a center-of-mass energy of 5.02 TeV per nucleon pair. In central PbPb collisions, the splitting function indicates a more unbalanced momentum ratio, compared to peripheral PbPb and pp collisions.. The measurements are compared to various predictions from event generators and analytical calculations.

Original language	English
Article number	142302
Journal	Physical Review Letters
Volume	120
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.120.142302
Publication status	Published - 3 Apr 2018
Externally published	Yes

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10.1103/PhysRevLett.120.142302

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@article{5a0fa9fca9754322912ade058fab3650,

title = "Measurement of the Splitting Function in pp and Pb-Pb Collisions at sNN =5.02 TeV",

abstract = "Data from heavy ion collisions suggest that the evolution of a parton shower is modified by interactions with the color charges in the dense partonic medium created in these collisions, but it is not known where in the shower evolution the modifications occur. The momentum ratio of the two leading partons, resolved as subjets, provides information about the parton shower evolution. This substructure observable, known as the splitting function, reflects the process of a parton splitting into two other partons and has been measured for jets with transverse momentum between 140 and 500 GeV, in pp and PbPb collisions at a center-of-mass energy of 5.02 TeV per nucleon pair. In central PbPb collisions, the splitting function indicates a more unbalanced momentum ratio, compared to peripheral PbPb and pp collisions.. The measurements are compared to various predictions from event generators and analytical calculations.",

author = "\{CMS Collaboration\} and Sirunyan, \{A. M.\} and A. Tumasyan and W. Adam and F. Ambrogi and E. Asilar and T. Bergauer and J. Brandstetter and E. Brondolin and M. Dragicevic and J. Er{\"o} and M. Flechl and M. Friedl and R. Fr{\"u}hwirth and Ghete, \{V. M.\} and J. Grossmann and J. Hrubec and M. Jeitler and A. K{\"o}nig and N. Krammer and I. Kr{\"a}tschmer and D. Liko and T. Madlener and I. Mikulec and E. Pree and N. Rad and H. Rohringer and J. Schieck and R. Sch{\"o}fbeck and M. Spanring and D. Spitzbart and W. Waltenberger and J. Wittmann and Wulz, \{C. E.\} and M. Zarucki and V. Chekhovsky and V. Mossolov and \{Suarez Gonzalez\}, J. and \{De Wolf\}, \{E. A.\} and F. Beaudette and C. Charlot and \{Granier De Cassagnac\}, R. and M. Nguyen and C. Ochando and P. Paganini and R. Salerno and Sauvan, \{J. B.\} and Y. Sirois and A. Zabi and A. Zghiche and \{De Wit\}, A.",

note = "Publisher Copyright: {\textcopyright} 2018 CERN.",

year = "2018",

month = apr,

day = "3",

doi = "10.1103/PhysRevLett.120.142302",

language = "English",

volume = "120",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "14",

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TY - JOUR

T1 - Measurement of the Splitting Function in pp and Pb-Pb Collisions at sNN =5.02 TeV

AU - CMS Collaboration

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Ambrogi, F.

AU - Asilar, E.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Brondolin, E.

AU - Dragicevic, M.

AU - Erö, J.

AU - Flechl, M.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Grossmann, J.

AU - Hrubec, J.

AU - Jeitler, M.

AU - König, A.

AU - Krammer, N.

AU - Krätschmer, I.

AU - Liko, D.

AU - Madlener, T.

AU - Mikulec, I.

AU - Pree, E.

AU - Rad, N.

AU - Rohringer, H.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Spanring, M.

AU - Spitzbart, D.

AU - Waltenberger, W.

AU - Wittmann, J.

AU - Wulz, C. E.

AU - Zarucki, M.

AU - Chekhovsky, V.

AU - Mossolov, V.

AU - Suarez Gonzalez, J.

AU - De Wolf, E. A.

AU - Beaudette, F.

AU - Charlot, C.

AU - Granier De Cassagnac, R.

AU - Nguyen, M.

AU - Ochando, C.

AU - Paganini, P.

AU - Salerno, R.

AU - Sauvan, J. B.

AU - Sirois, Y.

AU - Zabi, A.

AU - Zghiche, A.

AU - De Wit, A.

PY - 2018/4/3

Y1 - 2018/4/3

N2 - Data from heavy ion collisions suggest that the evolution of a parton shower is modified by interactions with the color charges in the dense partonic medium created in these collisions, but it is not known where in the shower evolution the modifications occur. The momentum ratio of the two leading partons, resolved as subjets, provides information about the parton shower evolution. This substructure observable, known as the splitting function, reflects the process of a parton splitting into two other partons and has been measured for jets with transverse momentum between 140 and 500 GeV, in pp and PbPb collisions at a center-of-mass energy of 5.02 TeV per nucleon pair. In central PbPb collisions, the splitting function indicates a more unbalanced momentum ratio, compared to peripheral PbPb and pp collisions.. The measurements are compared to various predictions from event generators and analytical calculations.

AB - Data from heavy ion collisions suggest that the evolution of a parton shower is modified by interactions with the color charges in the dense partonic medium created in these collisions, but it is not known where in the shower evolution the modifications occur. The momentum ratio of the two leading partons, resolved as subjets, provides information about the parton shower evolution. This substructure observable, known as the splitting function, reflects the process of a parton splitting into two other partons and has been measured for jets with transverse momentum between 140 and 500 GeV, in pp and PbPb collisions at a center-of-mass energy of 5.02 TeV per nucleon pair. In central PbPb collisions, the splitting function indicates a more unbalanced momentum ratio, compared to peripheral PbPb and pp collisions.. The measurements are compared to various predictions from event generators and analytical calculations.

U2 - 10.1103/PhysRevLett.120.142302

DO - 10.1103/PhysRevLett.120.142302

M3 - Article

C2 - 29694107

AN - SCOPUS:85044988165

SN - 0031-9007

VL - 120

JO - Physical Review Letters

JF - Physical Review Letters

IS - 14

M1 - 142302

ER -

Measurement of the Splitting Function in pp and Pb-Pb Collisions at sNN =5.02 TeV

Abstract

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