Azimuthal anisotropy of charged jet production in √sNN=2.76 TeV Pb–Pb collisions

ALICE Collaboration

doi:10.1016/j.physletb.2015.12.047

Azimuthal anisotropy of charged jet production in √s_NN=2.76 TeV Pb–Pb collisions

ALICE Collaboration

Relativistic Nuclear Physics

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

36 Scopus citations

Abstract

We present measurements of the azimuthal dependence of charged jet production in central and semi-central s_NN=2.76 TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified as v₂ ^{ch jet}. Jet finding is performed employing the anti-k_T algorithm with a resolution parameter R=0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero v₂ ^{ch jet} is observed in semi-central collisions (30–50% centrality) for 20<p_T ^{ch jet}<90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the v₂ of single charged particles at high p_T. Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions.

Original language	English
Pages (from-to)	511-525
Number of pages	15
Journal	Physics Letters B
Volume	753
DOIs	https://doi.org/10.1016/j.physletb.2015.12.047
State	Published - Feb 10 2016

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: State Committee of Science , World Federation of Scientists (WFS) and Swiss Fonds Kidagan , Armenia; Conselho Nacional de Desenvolvimento Científico e Tecnológico ( CNPq ), Financiadora de Estudos e Projetos ( FINEP ), Fundação de Amparo à Pesquisa do Estado de São Paulo ( FAPESP ); National Natural Science Foundation of China ( NSFC ), the Chinese Ministry of Education (CMOE) and the Ministry of Science and Technology of the People's Republic of China (MSTC); Ministry of Education and Youth of the Czech Republic ; Danish Natural Science Research Council , the Carlsberg Foundation and the Danish National Research Foundation ; The European Research Council under the European Community's Seventh Framework Programme; Helsinki Institute of Physics and the Academy of Finland ; French CNRS–IN2P3 , the ‘Region Pays de Loire’, ‘Region Alsace’, ‘Region Auvergne’ and CEA , France; German Bundesministerium fur Bildung, Wissenschaft, Forschung und Technologie ( BMBF ) and the Helmholtz Association ; General Secretariat for Research and Technology, Ministry of Development , Greece; National Research, Development and Innovation Office (NKFIH), Hungary; Department of Atomic Energy and Department of Science and Technology of the Government of India; Istituto Nazionale di Fisica Nucleare ( INFN ) and Centro Fermi – Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi” , Italy; Japan Society for the Promotion of Science (JSPS) KAKENHI and MEXT , Japan; Joint Institute for Nuclear Research , Dubna; National Research Foundation of Korea (NRF); Consejo Nacional de Cienca y Tecnologia ( CONACYT ), Direccion General de Asuntos del Personal Academico (DGAPA), México, Amerique Latine Formation academique–European Commission (ALFA–EC) and the EPLANET Program (European Particle Physics Latin American Network); Stichting voor Fundamenteel Onderzoek der Materie ( FOM ) and the Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; Research Council of Norway (NFR); National Science Centre of Poland ; Ministry of National Education/Institute for Atomic Physics and National Council of Scientific Research in Higher Education (CNCSI-UEFISCDI), Romania; Ministry of Education and Science of Russian Federation , Russian Academy of Sciences , Russian Federal Agency of Atomic Energy , Russian Federal Agency for Science and Innovations and The Russian Foundation for Basic Research ; Ministry of Education of Slovakia ; Department of Science and Technology, Republic of South Africa ; Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas (CIEMAT), E-Infrastructure shared between Europe and Latin America ( EELA ), Ministerio de Economía y Competitividad (MINECO) of Spain, Xunta de Galicia (Consellería de Educación), Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear ( CEADEN ), Cubaenergía , Cuba, and IAEA ( International Atomic Energy Agency ); Swedish Research Council (VR) and Knut & Alice Wallenberg Foundation (KAW); Ukraine Ministry of Education and Science ; United Kingdom Science and Technology Facilities Council (STFC); The United States Department of Energy , the United States National Science Foundation , the State of Texas , and the State of Ohio ; Ministry of Science, Education and Sports of Croatia and Unity through Knowledge Fund , Croatia; Council of Scientific and Industrial Research (CSIR), New Delhi, India; Pontificia Universidad Católica del Perú . 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: State Committee of Science, World Federation of Scientists (WFS) and Swiss Fonds Kidagan, Armenia; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Financiadora de Estudos e Projetos (FINEP), Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); National Natural Science Foundation of China (NSFC), the Chinese Ministry of Education (CMOE) and the Ministry of Science and Technology of the People's Republic of China (MSTC); Ministry of Education and Youth of the Czech Republic; Danish Natural Science Research Council, the Carlsberg Foundation and the Danish National Research Foundation; The European Research Council under the European Community's Seventh Framework Programme; Helsinki Institute of Physics and the Academy of Finland; French CNRS–IN2P3, the ‘Region Pays de Loire’ ‘Region Alsace’ ‘Region Auvergne’ and CEA, France; German Bundesministerium fur Bildung, Wissenschaft, Forschung und Technologie (BMBF) and the Helmholtz Association; General Secretariat for Research and Technology, Ministry of Development, Greece; National Research, Development and Innovation Office (NKFIH), Hungary; Department of Atomic Energy and Department of Science and Technology of the Government of India; Istituto Nazionale di Fisica Nucleare (INFN) and Centro Fermi – Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi” Italy; Japan Society for the Promotion of Science (JSPS) KAKENHI and MEXT, Japan; Joint Institute for Nuclear Research, Dubna; National Research Foundation of Korea (NRF); Consejo Nacional de Cienca y Tecnologia (CONACYT), Direccion General de Asuntos del Personal Academico (DGAPA), México, Amerique Latine Formation academique–European Commission (ALFA–EC) and the EPLANET Program (European Particle Physics Latin American Network); Stichting voor Fundamenteel Onderzoek der Materie (FOM) and the Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; Research Council of Norway (NFR); National Science Centre of Poland; Ministry of National Education/Institute for Atomic Physics and National Council of Scientific Research in Higher Education (CNCSI-UEFISCDI), Romania; Ministry of Education and Science of Russian Federation, Russian Academy of Sciences, Russian Federal Agency of Atomic Energy, Russian Federal Agency for Science and Innovations and The Russian Foundation for Basic Research; Ministry of Education of Slovakia; Department of Science and Technology, Republic of South Africa; Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas (CIEMAT), E-Infrastructure shared between Europe and Latin America (EELA), Ministerio de Economía y Competitividad (MINECO) of Spain, Xunta de Galicia (Consellería de Educación), Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Cubaenergía, Cuba, and IAEA (International Atomic Energy Agency); Swedish Research Council (VR) and Knut & Alice Wallenberg Foundation (KAW); Ukraine Ministry of Education and Science; United Kingdom Science and Technology Facilities Council (STFC); The United States Department of Energy, the United States National Science Foundation, the State of Texas, and the State of Ohio; Ministry of Science, Education and Sports of Croatia and Unity through Knowledge Fund, Croatia; Council of Scientific and Industrial Research (CSIR), New Delhi, India; Pontificia Universidad Católica del Perú.

Funders	Funder number
Not added	ALICE
CNCSI-UEFISCDI
Danish Natural Science Research Council
Department of Atomic Energy and Department of Science and Technology of the Government of India
Direccion General de Asuntos del Personal Academico (DGAPA), México, Amerique Latine Formation academique
General Secretariat for Research and Technology, Ministry of Development
Helsinki Institute of Physics
MSTC
Ministry of Education and Youth of the Czech Republic
Ministry of Education of Slovakia
Ministry of National Education/Institute for Atomic Physics and National Council of Scientific Research in Higher Education
Ministry of Science, Education and Sports of Croatia and Unity
NFR
Region Auvergne’ and CEA
Russian Federal Agency of Atomic Energy , Russian Federal Agency for Science and Innovations
State Committee of Science , World Federation
Swiss Fonds Kidagan
United Kingdom Science and Technology Facilities Council
Xunta de Galicia (Consellería de Educación
National Science Foundation	1307461, 1407051
National Science Foundation
U.S. Department of Energy
Alabama Farmers Federation
Unity through Knowledge Fund
California Earthquake Authority
Science and Technology Facilities Council	2014 STFC Nuclear Physics CG, ST/M001601/1, ST/L005689/1, ST/L005751/1, GRIDPP, ST/J000108/1, ST/L005670/1, ST/M00158X/1, ST/M001598/1
Science and Technology Facilities Council
European Commission
European Research Council
Department of Science and Technology, Republic of South Africa
Department of Science and Technology, Ministry of Science and Technology, India
Council of Scientific and Industrial Research, India
Japan Society for the Promotion of Science	15H03664, 25287048, 26610071, 26220707
Japan Society for the Promotion of Science
Ministry of Education, Culture, Sports, Science and Technology
Stichting voor Fundamenteel Onderzoek der Materie
Danmarks Grundforskningsfond
Fundação de Amparo à Pesquisa do Estado de São Paulo
National Natural Science Foundation of China
Russian Foundation for Basic Research
Ministry of Education of the People's Republic of China
Academy of Finland
Bundesministerium für Bildung und Forschung
Russian Academy of Sciences
Carlsbergfondet
Ministry of Science and Technology of the People's Republic of China
Consejo Nacional de Ciencia y Tecnología
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Ministerio de Economía y Competitividad
Foundation for Fundamental Research on Matter
Ministry of Education and Science of the Russian Federation
Conselho Nacional de Desenvolvimento Científico e Tecnológico
National Research Foundation of Korea
Joint Institute for Nuclear Research
Instituto Nazionale di Fisica Nucleare
Knut och Alice Wallenbergs Stiftelse
Narodowe Centrum Nauki
Vetenskapsrådet
International Atomic Energy Agency
Centre National de la Recherche Scientifique
Financiadora de Estudos e Projetos
Seventh Framework Programme
Norges Forskningsråd
Department of Science and Technology, Government of Kerala
Ministarstvo Znanosti, Obrazovanja i Sporta
Bundesministerium für Bildung und Frauen
State Committee of Science
Ministry of Education and Science of Ukraine
Helmholtz Association
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie
Nemzeti Kutatási Fejlesztési és Innovációs Hivatal
Pontificia Universidad Católica del Perú
Institut National de Physique Nucléaire et de Physique des Particules
Conseil Régional des Pays de la Loire
Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear

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10.1016/j.physletb.2015.12.047

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@article{040225d1c7dc4e2e9f622a262d239749,

title = "Azimuthal anisotropy of charged jet production in √sNN=2.76 TeV Pb–Pb collisions",

abstract = "We present measurements of the azimuthal dependence of charged jet production in central and semi-central sNN=2.76 TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified as v2 ch jet. Jet finding is performed employing the anti-kT algorithm with a resolution parameter R=0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero v2 ch jet is observed in semi-central collisions (30–50% centrality) for 20T ch jet<90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the v2 of single charged particles at high pT. Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions.",

author = "{ALICE Collaboration} and J. Adam and D. Adamov{\'a} 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 Alam, {S. N.} and D. Aleksandrov and B. Alessandro and D. Alexandre and {Alfaro Molina}, R. and A. Alici and A. Alkin and Almaraz, {J. R.M.} and J. Alme and T. Alt and S. Altinpinar and I. Altsybeev and {Alves Garcia Prado}, C. and C. Andrei and A. Andronic and V. Anguelov and J. Anielski and T. Anti{\v c}i{\'c} and F. Antinori and P. Antonioli 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 B. Audurier and A. Augustinus and R. Averbeck and Azmi, {M. D.} and A. Badal{\`a} and Baek, {Y. W.} and S. Bagnasco and R. Bailhache and R. Bala and A. Baldisseri and Baral, {R. C.} and F. Bock and Read, {K. F.}",

note = "Publisher Copyright: {\textcopyright} 2015 CERN for the benefit of the ALICE Collaboration",

year = "2016",

month = feb,

day = "10",

doi = "10.1016/j.physletb.2015.12.047",

language = "English",

volume = "753",

pages = "511--525",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

}

TY - JOUR

T1 - Azimuthal anisotropy of charged jet production in √sNN=2.76 TeV Pb–Pb collisions

AU - ALICE Collaboration

AU - Adam, J.

AU - Adamová, D.

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 - Alam, S. N.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alexandre, D.

AU - Alfaro Molina, R.

AU - Alici, A.

AU - Alkin, A.

AU - Almaraz, J. R.M.

AU - Alme, J.

AU - Alt, T.

AU - Altinpinar, S.

AU - Altsybeev, I.

AU - Alves Garcia Prado, C.

AU - Andrei, C.

AU - Andronic, A.

AU - Anguelov, V.

AU - Anielski, J.

AU - Antičić, T.

AU - Antinori, F.

AU - Antonioli, P.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arcelli, S.

AU - Arnaldi, R.

AU - Arnold, O. W.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Audurier, B.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Azmi, M. D.

AU - Badalà, A.

AU - Baek, Y. W.

AU - Bagnasco, S.

AU - Bailhache, R.

AU - Bala, R.

AU - Baldisseri, A.

AU - Baral, R. C.

AU - Bock, F.

AU - Read, K. F.

PY - 2016/2/10

Y1 - 2016/2/10

N2 - We present measurements of the azimuthal dependence of charged jet production in central and semi-central sNN=2.76 TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified as v2 ch jet. Jet finding is performed employing the anti-kT algorithm with a resolution parameter R=0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero v2 ch jet is observed in semi-central collisions (30–50% centrality) for 20T ch jet<90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the v2 of single charged particles at high pT. Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions.

AB - We present measurements of the azimuthal dependence of charged jet production in central and semi-central sNN=2.76 TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified as v2 ch jet. Jet finding is performed employing the anti-kT algorithm with a resolution parameter R=0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero v2 ch jet is observed in semi-central collisions (30–50% centrality) for 20T ch jet<90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the v2 of single charged particles at high pT. Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions.

UR - http://www.scopus.com/inward/record.url?scp=85040843301&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2015.12.047

DO - 10.1016/j.physletb.2015.12.047

M3 - Article

AN - SCOPUS:85040843301

SN - 0370-2693

VL - 753

SP - 511

EP - 525

JO - Physics Letters B

JF - Physics Letters B

ER -

Azimuthal anisotropy of charged jet production in √s_NN=2.76 TeV Pb–Pb collisions

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