Azimuthal Anisotropy of Heavy-Flavor Decay Electrons in p -Pb Collisions at sNN =5.02 TeV

(ALICE Collaboration)

doi:10.1103/PhysRevLett.122.072301

Azimuthal Anisotropy of Heavy-Flavor Decay Electrons in p -Pb Collisions at sNN =5.02 TeV

(ALICE Collaboration)

Relativistic Nuclear Physics

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

26 Scopus citations

Abstract

Angular correlations between heavy-flavor decay electrons and charged particles at midrapidity (|η|<0.8) are measured in p-Pb collisions at sNN=5.02 TeV. The analysis is carried out for the 0%-20% (high) and 60%-100% (low) multiplicity ranges. The jet contribution in the correlation distribution from high-multiplicity events is removed by subtracting the distribution from low-multiplicity events. An azimuthal modulation remains after removing the jet contribution, similar to previous observations in two-particle angular correlation measurements for light-flavor hadrons. A Fourier decomposition of the modulation results in a positive second-order coefficient (v2) for heavy-flavor decay electrons in the transverse momentum interval 1.5<pT<4 GeV/c in high-multiplicity events, with a significance larger than 5σ. The results are compared with those of charged particles at midrapidity and those of inclusive muons at forward rapidity. The v2 measurement of open heavy-flavor particles at midrapidity in small collision systems could provide crucial information to help interpret the anisotropies observed in such systems.

Original language	English
Article number	072301
Journal	Physical Review Letters
Volume	122
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.122.072301
State	Published - Feb 22 2019

Funding

The ALICE Collaboration would like to thank all its engineers and technicians for their invaluable contributions to the construction of the experiment and the CERN accelerator teams for the outstanding performance of the LHC complex. The ALICE Collaboration gratefully acknowledges the resources and support provided by all Grid Centres and the Worldwide LHC Computing Grid (WLCG) Collaboration. The ALICE Collaboration acknowledges the following funding agencies for their support in building and running the ALICE detector: the A. I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation (ANSL) and the State Committee of Science and World Federation of Scientists (WFS), Armenia; the Austrian Academy of Sciences and Nationalstiftung für Forschung, Technologie und Entwicklung, Austria; the Ministry of Communications and High Technologies, National Nuclear Research Center, Azerbaijan; the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Universidade Federal do Rio Grande do Sul (UFRGS), Financiadora de Estudos e Projetos (Finep) and Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP), Brazil; the Ministry of Science & Technology of China (MSTC), the National Natural Science Foundation of China (NSFC), and the Ministry of Education of China (MOEC), China; the Ministry of Science and Education, Croatia; Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic; The Danish Council for Independent Research|Natural Sciences, the Carlsberg Foundation, and the Danish National Research Foundation (DNRF), Denmark; the Helsinki Institute of Physics (HIP), Finland; the Commissariat à l’Energie Atomique (CEA), the Institut National de Physique Nucléaire et de Physique des Particules (IN2P3), and the Centre National de la Recherche Scientifique (CNRS), France; Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (BMBF) and GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany; the General Secretariat for Research and Technology, Ministry of Education, Research and Religions, Greece; the National Research, Development and Innovation Office, Hungary; the Department of Atomic Energy (DAE), Department of Science and Technology (DST), and the University Grants Commission, Government of India (UGC), and the Council of Scientific and Industrial Research (CSIR), India; the Indonesian Institute of Science, Indonesia; Centro Fermi—Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi and Istituto Nazionale di Fisica Nucleare (INFN), Italy; the Institute for Innovative Science and Technology, the Nagasaki Institute of Applied Science (IIST), Japan Society for the Promotion of Science (JSPS) KAKENHI, and the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan; Consejo Nacional de Ciencia (CONACYT) y Tecnología, through Fondo de Cooperación Internacional en Ciencia y Tecnología (FONCICYT) and Dirección General de Asuntos del Personal Academico (DGAPA), Mexico; Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; The Research Council of Norway, Norway; the Commission on Science and Technology for Sustainable Development in the South (COMSATS), Pakistan; Pontificia Universidad Católica del Perú, Peru; the Ministry of Science and Higher Education and National Science Centre, Poland; Korea Institute of Science and Technology Information and the National Research Foundation of Korea (NRF), Republic of Korea; the Ministry of Education and Scientific Research, Institute of Atomic Physics, and the Romanian National Agency for Science, Technology and Innovation, Romania; the Joint Institute for Nuclear Research (JINR), the Ministry of Education and Science of the Russian Federation, and the National Research Centre Kurchatov Institute, Russia; the Ministry of Education, Science, Research and Sport of the Slovak Republic, Slovakia; the National Research Foundation of South Africa, South Africa; Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Cubaenergía, Cuba and Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Spain; the Swedish Research Council (VR) and the Knut & Alice Wallenberg Foundation (KAW), Sweden; the European Organization for Nuclear Research, Switzerland; the National Science and Technology Development Agency (NSDTA), the Suranaree University of Technology (SUT), and the Office of the Higher Education Commission under NRU project of Thailand, Thailand; the Turkish Atomic Energy Agency (TAEK), Turkey; the National Academy of Sciences of Ukraine, Ukraine; the Science and Technology Facilities Council (STFC), United Kingdom; and the National Science Foundation of the United States of America (NSF) and the United States Department of Energy, Office of Nuclear Physics (DOE NP), United States of America.

Funders	Funder number
Not added	ST/N00261X/1, 1657698, 1796881, ALICE, ST/M00340X/1, ST/L005751/1, ST/M00158X/1, 1843572, ST/P004199/1
Austrian Academy of Sciences and Nationalstiftung für Forschung, Technologie und Entwicklung
Centro Fermi—Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi and Istituto Nazionale di Fisica Nucleare
Commission on Science and Technology for Sustainable Development in the South
General Secretariat for Research and Technology, Ministry of Education, Research and Religions
Helsinki Institute of Physics
Indonesian Institute of Science, Indonesia
Ministry of Communications and High Technologies
Ministry of Education, Science, Research and Sport
Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic
NRU
Nagasaki Institute of Applied Science
National Nuclear Research Center
Romanian National Agency for Science, Technology and Innovation
State Committee of Science and World Federation
Turkish Atomic Energy Agency
University Grants Commission, Government of India
Yerevan Physics Institute
National Science Foundation	1719759
U.S. Department of Energy
Nuclear Physics
Natur og Univers, Det Frie Forskningsråd
Türkiye Atom Enerjisi Kurumu
Ministry of Higher Education and Scientific Research
CERN
Office of the Higher Education Commission
Ministarstvo znanosti i obrazovanja
Institute for Innovative Science and Technology, Nagasaki Institute of Applied Science
Science and Technology Facilities Council	ST/P005047/1, GRIDPP
National Research Foundation
Department of Science and Technology, Ministry of Science and Technology, India
Council of Scientific and Industrial Research, India
University Grants Commission
Department of Atomic Energy, Government of India
Japan Society for the Promotion of Science	15H03664, 17H01122, 17H02876, 16K17701
Ministry of Education, Culture, Sports, Science and Technology
Danmarks Grundforskningsfond
Fundação de Amparo à Pesquisa do Estado de São Paulo
National Natural Science Foundation of China
Ministry of Education of the People's Republic of China
Bundesministerium für Bildung und Forschung
Carlsbergfondet
Ministry of Science and Technology of the People's Republic of China
Consejo Nacional de Ciencia y Tecnología
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Ministry of Education and Science of the Russian Federation
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Korea Institute of Science and Technology Information
National Research Foundation of Korea
Joint Institute for Nuclear Research
Instituto Nazionale di Fisica Nucleare
Knut och Alice Wallenbergs Stiftelse
National Science and Technology Development Agency
Narodowe Centrum Nauki
Suranaree University of Technology
Vetenskapsrådet
Ministerstwo Edukacji i Nauki
National Academy of Sciences of Ukraine
Centre National de la Recherche Scientifique
Financiadora de Estudos e Projetos
Universidade Federal do Rio Grande do Sul
Norges Forskningsråd
Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
Fondo de Cooperación Internacional en Ciencia y Tecnología
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
GSI Helmholtzzentrum für Schwerionenforschung
Nemzeti Kutatási Fejlesztési és Innovációs Hivatal
Institut National de Physique Nucléaire et de Physique des Particules
National Research Center "Kurchatov Institute"
Institutul de Fizică Atomică
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear
Indian Institute of Space Science and Technology

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10.1103/PhysRevLett.122.072301

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@article{75e2e39403524959b259180510950a1e,

title = "Azimuthal Anisotropy of Heavy-Flavor Decay Electrons in p -Pb Collisions at sNN =5.02 TeV",

abstract = "Angular correlations between heavy-flavor decay electrons and charged particles at midrapidity (|η|<0.8) are measured in p-Pb collisions at sNN=5.02 TeV. The analysis is carried out for the 0%-20% (high) and 60%-100% (low) multiplicity ranges. The jet contribution in the correlation distribution from high-multiplicity events is removed by subtracting the distribution from low-multiplicity events. An azimuthal modulation remains after removing the jet contribution, similar to previous observations in two-particle angular correlation measurements for light-flavor hadrons. A Fourier decomposition of the modulation results in a positive second-order coefficient (v2) for heavy-flavor decay electrons in the transverse momentum interval 1.5",

author = "{(ALICE Collaboration)} and S. Acharya and D. Adamov{\'a} and J. Adolfsson and Aggarwal, {M. M.} and {Aglieri Rinella}, G. and M. Agnello and N. Agrawal and Z. Ahammed and Ahn, {S. U.} and S. Aiola and A. Akindinov and M. Al-Turany and Alam, {S. N.} and Albuquerque, {D. S.D.} and D. Aleksandrov and B. Alessandro and {Alfaro Molina}, R. and Y. Ali and A. Alici and A. Alkin and J. Alme and T. Alt and L. Altenkamper and I. Altsybeev and Anaam, {M. N.} and C. Andrei and D. Andreou and Andrews, {H. A.} and A. Andronic and M. Angeletti and V. Anguelov and C. Anson and T. Anti{\v c}i{\'c} and F. Antinori and P. Antonioli and R. Anwar and N. Apadula and L. Aphecetche and H. Appelsh{\"a}user and S. Arcelli and R. Arnaldi and Arnold, {O. W.} and Arsene, {I. C.} and M. Arslandok and A. Augustinus and R. Averbeck and Azmi, {M. D.} and F. Bock and Read, {K. F.} and Schmidt, {N. V.}",

note = "Publisher Copyright: {\textcopyright} 2019 CERN, for the ALICE Collaboration.",

year = "2019",

month = feb,

day = "22",

doi = "10.1103/PhysRevLett.122.072301",

language = "English",

volume = "122",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "7",

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TY - JOUR

T1 - Azimuthal Anisotropy of Heavy-Flavor Decay Electrons in p -Pb Collisions at sNN =5.02 TeV

AU - (ALICE Collaboration)

AU - Acharya, S.

AU - Adamová, D.

AU - Adolfsson, J.

AU - Aggarwal, M. M.

AU - Aglieri Rinella, G.

AU - Agnello, M.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahn, S. U.

AU - Aiola, S.

AU - Akindinov, A.

AU - Al-Turany, M.

AU - Alam, S. N.

AU - Albuquerque, D. S.D.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alfaro Molina, R.

AU - Ali, Y.

AU - Alici, A.

AU - Alkin, A.

AU - Alme, J.

AU - Alt, T.

AU - Altenkamper, L.

AU - Altsybeev, I.

AU - Anaam, M. N.

AU - Andrei, C.

AU - Andreou, D.

AU - Andrews, H. A.

AU - Andronic, A.

AU - Angeletti, M.

AU - Anguelov, V.

AU - Anson, C.

AU - Antičić, T.

AU - Antinori, F.

AU - Antonioli, P.

AU - Anwar, R.

AU - Apadula, N.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arcelli, S.

AU - Arnaldi, R.

AU - Arnold, O. W.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Azmi, M. D.

AU - Bock, F.

AU - Read, K. F.

AU - Schmidt, N. V.

PY - 2019/2/22

Y1 - 2019/2/22

N2 - Angular correlations between heavy-flavor decay electrons and charged particles at midrapidity (|η|<0.8) are measured in p-Pb collisions at sNN=5.02 TeV. The analysis is carried out for the 0%-20% (high) and 60%-100% (low) multiplicity ranges. The jet contribution in the correlation distribution from high-multiplicity events is removed by subtracting the distribution from low-multiplicity events. An azimuthal modulation remains after removing the jet contribution, similar to previous observations in two-particle angular correlation measurements for light-flavor hadrons. A Fourier decomposition of the modulation results in a positive second-order coefficient (v2) for heavy-flavor decay electrons in the transverse momentum interval 1.5

AB - Angular correlations between heavy-flavor decay electrons and charged particles at midrapidity (|η|<0.8) are measured in p-Pb collisions at sNN=5.02 TeV. The analysis is carried out for the 0%-20% (high) and 60%-100% (low) multiplicity ranges. The jet contribution in the correlation distribution from high-multiplicity events is removed by subtracting the distribution from low-multiplicity events. An azimuthal modulation remains after removing the jet contribution, similar to previous observations in two-particle angular correlation measurements for light-flavor hadrons. A Fourier decomposition of the modulation results in a positive second-order coefficient (v2) for heavy-flavor decay electrons in the transverse momentum interval 1.5

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DO - 10.1103/PhysRevLett.122.072301

M3 - Article

C2 - 30848618

AN - SCOPUS:85062043839

SN - 0031-9007

VL - 122

JO - Physical Review Letters

JF - Physical Review Letters

IS - 7

M1 - 072301

ER -

Azimuthal Anisotropy of Heavy-Flavor Decay Electrons in p -Pb Collisions at sNN =5.02 TeV

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