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)
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Purdue University
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Benemerita Universidad Autonoma de Puebla
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University of Florida
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Petersburg Nuclear Physics Institute (PNPI)
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
University of Belgrade
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Universidad Autónoma de Madrid
University of Oviedo
CSIC-Univ. Cantabria
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ETH Zurich
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Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

129 Citations (Scopus)

Résumé

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.

langue originale	Anglais
Numéro d'article	142302
journal	Physical Review Letters
Volume	120
Numéro de publication	14
Les DOIs	https://doi.org/10.1103/PhysRevLett.120.142302
état	Publié - 3 avr. 2018
Modification externe	Oui

Accès au document

10.1103/PhysRevLett.120.142302

Contient cette citation

@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",

}

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

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