Long-range two-particle correlations of strange hadrons with charged particles in pPb and PbPb collisions at LHC energies

CMS Collaboration

doi:10.1016/j.physletb.2015.01.034

Long-range two-particle correlations of strange hadrons with charged particles in pPb and PbPb collisions at LHC energies

CMS Collaboration

European Organization for Nuclear Research
Yerevan Physics Institute
Institut für Hochenergiephysik
Vienna University of Technology
National Centre for Particle and High Energy Physics
University of Antwerp
Vrjie Universiteit Brussel
Université Libre de Bruxelles
Ghent University
University of Louvain
Université de Strasbourg
National Institute of Chemical Physics and Biophysics, Tallinn
Moscow State University
Université de Mons
Centro Brasileiro de Pesquisas Fisicas
Rua São Francisco de Xavier
University of Campinas (UNICAMP)
Federal University of ABC (UFABC)
São Paulo State University
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
University of Sofia
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
University of Cyprus
Charles University
Joint Institute for Nuclear Research, Dubna
Egyptian Network of High Energy Physics
Suez University
Cairo University
Fayoum University
British University in Egypt
Ain Shams University
University of Helsinki
Helsinki Institute of Physics
LUT University
CEA/UVSQ/CNRS
Université de Haute Alsace
Université Paris-Sud
IGFL, Université de Lyon, Université Lyon 1
Tbilisi State University
RWTH Aachen University
c/o DESY
Joint Faculty of the Brandenburg University of Technology Cottbus Senftenberg
Universität Hamburg
Universität Karlsruhe/Forschungszentrum Karlsruhe
NCSR Demokritos
University of Athens
University of Ioannina
Wigner Research Centre for Physics
Institute of Nuclear Research ATOMKI
Eötvös Loránd University
University of Debrecen
National Institute of Science Education and Research
Panjab University
University of Delhi
Saha Institute of Nuclear Physics
Bhabha Atomic Research Centre
Tata Institute of Fundamental Research, Mumbai
University of Visva-Bharati
King Abdulaziz University
University of Ruhuna
Institute for Research in Fundamental Sciences (IPM)
Isfahan University of Technology
Sharif University of Technology
Islamic Azad University, Science and Research Branch
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
LNF-INFN
Sezione di Genova
University of Genoa
INFN Sezione di Milano-Bicocca
University of Milano-Bicocca
INFN Sezione di Napoli
Università degli Studi della Basilicata
Università G. Marconi (Roma)
University of Naples Federico II
INFN
Laboratori Nazionali di Legnaro
University of Padova
Università di Trento
INFN Sezione di Pavia
University of Pavia
INFN Sezione di Perugia
University of Perugia
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
University of Siena
Scuola Normale Superiore di Pisa
University of Pisa
Centre national de la recherche scientifique
Purdue University
Sezione di Roma
University of Rome
INFN Sezione di Torino
University of Turin
Laboratory of Molecular Pathology
INFN Sezione di Trieste
University of Trieste
Kangwon National University
Kyungpook National University
Chonbuk National University
Chonnam National University
Korea University
University of Seoul
Sungkyunkwan University
Vilnius University
University Malaya
CINVESTAV-IPN
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
Lisboa
Institute for Nuclear Research of the Russian Academy of Sciences
Petersburg Nuclear Physics Institute (PNPI)
St. Petersburg State Polytechnical University
Institute for Theoretical and Experimental Physics
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Kurchatov Institute
University of Belgrade
University of Belgrade
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT)
Universidad Autónoma de Madrid
University of Oviedo
CSIC-Univ. Cantabria
Paul Scherrer Institut
ETH Zurich
University of Zurich
University of Bern
National Central University
National Taiwan University
Chulalongkorn University
Cukurova University
Gaziosmanpasa University
Adiyaman University
Cag University
Middle East Technical University (METU)
Anadolu University
Izmir Institute of Technology
Necmettin Erbakan University
Bogazici University
Ozyegin University
Marmara University
Kafkas University
Istanbul Technical University
Kharkov Institute of Physics and Technology
University of Bristol
CCLRC Rutherford Appleton Laboratory
University of Southampton
Imperial College London
Brunel University London
Baylor University
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
University of California, Santa Barbara
California Institute of Technology
Carnegie Mellon University
University of Colorado Boulder
Cornell University
Fairfield University
Fermi National Accelerator Laboratory
University of Florida
Florida International University
Florida State University
Florida Institute of Technology
University of Illinois at Chicago
University of Iowa
Mimar Sinan University
Argonne National Laboratory
Erzincan University
Yildiz Technical University
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
Northwestern University
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 A&M University at Qatar
Texas Tech University
Vanderbilt University
University of Virginia
Wayne State University
University of Wisconsin-Madison

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

114 Citations (Scopus)

Abstract

Measurements of two-particle angular correlations between an identified strange hadron (K_S ⁰ or Λ/Λ‾) and a charged particle, emitted in pPb collisions, are presented over a wide range in pseudorapidity and full azimuth. The data, corresponding to an integrated luminosity of approximately 35 nb⁻¹, were collected at a nucleon–nucleon center-of-mass energy (s_NN) of 5.02 TeV with the CMS detector at the LHC. The results are compared to semi-peripheral PbPb collision data at s_NN=2.76 TeV, covering similar charged-particle multiplicities in the events. The observed azimuthal correlations at large relative pseudorapidity are used to extract the second-order (v₂) and third-order (v₃) anisotropy harmonics of K_S ⁰ and Λ/Λ‾ particles. These quantities are studied as a function of the charged-particle multiplicity in the event and the transverse momentum of the particles. For high-multiplicity pPb events, a clear particle species dependence of v₂ and v₃ is observed. For p_T<2 GeV, the v₂ and v₃ values of K_S ⁰ particles are larger than those of Λ/Λ‾ particles at the same p_T. This splitting effect between two particle species is found to be stronger in pPb than in PbPb collisions in the same multiplicity range. When divided by the number of constituent quarks and compared at the same transverse kinetic energy per quark, both v₂ and v₃ for K_S ⁰ particles are observed to be consistent with those for Λ/Λ‾ particles at the 10% level in pPb collisions. This consistency extends over a wide range of particle transverse kinetic energy and event multiplicities.

Original language	English
Pages (from-to)	200-224
Number of pages	25
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	742
DOIs	https://doi.org/10.1016/j.physletb.2015.01.034
Publication status	Published - 6 Mar 2015

Keywords

CMS
Correlations
Flow
High-multiplicity
Long-range
Ridge

Access to Document

10.1016/j.physletb.2015.01.034

Cite this

@article{31dc913c16c641f180844009f6739735,

title = "Long-range two-particle correlations of strange hadrons with charged particles in pPb and PbPb collisions at LHC energies",

abstract = "Measurements of two-particle angular correlations between an identified strange hadron (KS 0 or Λ/Λ‾) and a charged particle, emitted in pPb collisions, are presented over a wide range in pseudorapidity and full azimuth. The data, corresponding to an integrated luminosity of approximately 35 nb−1, were collected at a nucleon–nucleon center-of-mass energy (sNN) of 5.02 TeV with the CMS detector at the LHC. The results are compared to semi-peripheral PbPb collision data at sNN=2.76 TeV, covering similar charged-particle multiplicities in the events. The observed azimuthal correlations at large relative pseudorapidity are used to extract the second-order (v2) and third-order (v3) anisotropy harmonics of KS 0 and Λ/Λ‾ particles. These quantities are studied as a function of the charged-particle multiplicity in the event and the transverse momentum of the particles. For high-multiplicity pPb events, a clear particle species dependence of v2 and v3 is observed. For pT<2 GeV, the v2 and v3 values of KS 0 particles are larger than those of Λ/Λ‾ particles at the same pT. This splitting effect between two particle species is found to be stronger in pPb than in PbPb collisions in the same multiplicity range. When divided by the number of constituent quarks and compared at the same transverse kinetic energy per quark, both v2 and v3 for KS 0 particles are observed to be consistent with those for Λ/Λ‾ particles at the 10\% level in pPb collisions. This consistency extends over a wide range of particle transverse kinetic energy and event multiplicities.",

keywords = "CMS, Correlations, Flow, High-multiplicity, Long-range, Ridge",

author = "\{CMS Collaboration\} and V. Khachatryan and Sirunyan, \{A. M.\} and A. Tumasyan and W. Adam and T. Bergauer and M. Dragicevic and J. Er{\"o} and C. Fabjan and M. Friedl and R. Fr{\"u}hwirth and Ghete, \{V. M.\} and C. Hartl and N. H{\"o}rmann and J. Hrubec and M. Jeitler and W. Kiesenhofer and V. Kn{\"u}nz and M. Krammer and I. Kr{\"a}tschmer and D. Liko and I. Mikulec and D. Rabady and B. Rahbaran and H. Rohringer and R. Sch{\"o}fbeck and J. Strauss and A. Taurok and W. Treberer-Treberspurg and W. Waltenberger and Wulz, \{C. E.\} and V. Mossolov and N. Shumeiko and \{Suarez Gonzalez\}, J. and S. Alderweireldt and M. Bansal and S. Bansal and T. Cornelis and \{De Wolf\}, \{E. A.\} and X. Janssen and A. Knutsson 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",

note = "Publisher Copyright: {\textcopyright} 2015 The Authors",

year = "2015",

month = mar,

day = "6",

doi = "10.1016/j.physletb.2015.01.034",

language = "English",

volume = "742",

pages = "200--224",

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

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Long-range two-particle correlations of strange hadrons with charged particles in pPb and PbPb collisions at LHC energies

AU - CMS Collaboration

AU - Khachatryan, V.

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Bergauer, T.

AU - Dragicevic, M.

AU - Erö, J.

AU - Fabjan, C.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hartl, C.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - Kiesenhofer, W.

AU - Knünz, V.

AU - Krammer, M.

AU - Krätschmer, I.

AU - Liko, D.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schöfbeck, R.

AU - Strauss, J.

AU - Taurok, A.

AU - Treberer-Treberspurg, W.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Mossolov, V.

AU - Shumeiko, N.

AU - Suarez Gonzalez, J.

AU - Alderweireldt, S.

AU - Bansal, M.

AU - Bansal, S.

AU - Cornelis, T.

AU - De Wolf, E. A.

AU - Janssen, X.

AU - Knutsson, 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.

PY - 2015/3/6

Y1 - 2015/3/6

N2 - Measurements of two-particle angular correlations between an identified strange hadron (KS 0 or Λ/Λ‾) and a charged particle, emitted in pPb collisions, are presented over a wide range in pseudorapidity and full azimuth. The data, corresponding to an integrated luminosity of approximately 35 nb−1, were collected at a nucleon–nucleon center-of-mass energy (sNN) of 5.02 TeV with the CMS detector at the LHC. The results are compared to semi-peripheral PbPb collision data at sNN=2.76 TeV, covering similar charged-particle multiplicities in the events. The observed azimuthal correlations at large relative pseudorapidity are used to extract the second-order (v2) and third-order (v3) anisotropy harmonics of KS 0 and Λ/Λ‾ particles. These quantities are studied as a function of the charged-particle multiplicity in the event and the transverse momentum of the particles. For high-multiplicity pPb events, a clear particle species dependence of v2 and v3 is observed. For pT<2 GeV, the v2 and v3 values of KS 0 particles are larger than those of Λ/Λ‾ particles at the same pT. This splitting effect between two particle species is found to be stronger in pPb than in PbPb collisions in the same multiplicity range. When divided by the number of constituent quarks and compared at the same transverse kinetic energy per quark, both v2 and v3 for KS 0 particles are observed to be consistent with those for Λ/Λ‾ particles at the 10% level in pPb collisions. This consistency extends over a wide range of particle transverse kinetic energy and event multiplicities.

AB - Measurements of two-particle angular correlations between an identified strange hadron (KS 0 or Λ/Λ‾) and a charged particle, emitted in pPb collisions, are presented over a wide range in pseudorapidity and full azimuth. The data, corresponding to an integrated luminosity of approximately 35 nb−1, were collected at a nucleon–nucleon center-of-mass energy (sNN) of 5.02 TeV with the CMS detector at the LHC. The results are compared to semi-peripheral PbPb collision data at sNN=2.76 TeV, covering similar charged-particle multiplicities in the events. The observed azimuthal correlations at large relative pseudorapidity are used to extract the second-order (v2) and third-order (v3) anisotropy harmonics of KS 0 and Λ/Λ‾ particles. These quantities are studied as a function of the charged-particle multiplicity in the event and the transverse momentum of the particles. For high-multiplicity pPb events, a clear particle species dependence of v2 and v3 is observed. For pT<2 GeV, the v2 and v3 values of KS 0 particles are larger than those of Λ/Λ‾ particles at the same pT. This splitting effect between two particle species is found to be stronger in pPb than in PbPb collisions in the same multiplicity range. When divided by the number of constituent quarks and compared at the same transverse kinetic energy per quark, both v2 and v3 for KS 0 particles are observed to be consistent with those for Λ/Λ‾ particles at the 10% level in pPb collisions. This consistency extends over a wide range of particle transverse kinetic energy and event multiplicities.

KW - CMS

KW - Correlations

KW - Flow

KW - High-multiplicity

KW - Long-range

KW - Ridge

U2 - 10.1016/j.physletb.2015.01.034

DO - 10.1016/j.physletb.2015.01.034

M3 - Article

AN - SCOPUS:85041757380

SN - 0370-2693

VL - 742

SP - 200

EP - 224

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

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

ER -

Long-range two-particle correlations of strange hadrons with charged particles in pPb and PbPb collisions at LHC energies

Abstract

Keywords

Access to Document

Fingerprint

Cite this