First measurement of quarkonium polarization in nuclear collisions at the LHC

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Acharya, S. ^[1] ; Adamova, D. ^[2] ; Adler, A. ^[3] ; Adolfsson, J. ^[4] ; Aggarwal, M. M. ^[5] ; Rinella, G. Aglieri ^[6] ; Agnello, M. ^{[7, 8]} ; Agrawal, N. ^{[9, 10]} ; Ahammed, Z. ^[1] ; Ahmad, S. ^[11] ; Ahn, S. U. ^[12] ; Akindinov, A. ^[13] ; Al-Turany, M. ^{[14, 15]} ; Alam, S. N. ^[1] ; Albuquerque, D. S. D. ^[16] ; Aleksandrov, D. ^[17] ; Alessandro, B. ^[18] ; Alfanda, H. M. ^[19] ; Alfaro Molina, R. ^[20] ; Ali, B. ^[11] ; Ali, Y. ^[21] ; Alici, A. ^{[22, 23, 9, 10]} ; Alkin, A. ^[24] ; Alme, J. ^[25] ; Alt, T. ^[26] ; Altenkamper, L. ^[25] ; Altsybeev, I. ^[27] ; Anaam, M. N. ^[19] ; Andrei, C. ^[28] ; Andreou, D. ^[6] ; Andrews, H. A. ^[29] ; Andronic, A. ^[30] ; Angeletti, M. ^[6] ; Anguelov, V. ^[31] ; Anson, C. ^[32] ; Anticic, T. ^[33] ; Antinori, F. ^[34] ; Antonioli, P. ^[9] ; Anwar, R. ^[35] ; Apadula, N. ^[36] ; Aphecetche, L. ^[37] ; Appelshaeuser, H. ^[26] ; Arcelli, S. ^{[22, 23]} ; Arnaldi, R. ^[18] ; Arratia, M. ^[36] ; Arsene, I. C. ^[38] ; Arslandok, M. ^[31] ; Augustinus, A. ^[6] ; Averbeck, R. ^{[14, 15]} ; Aziz, S. ^[39] ; Azmi, M. D. ^[11] ; Badala, A. ^[40] ; Baek, Y. W. ^[41] ; Bagnasco, S. ^[18] ; Bai, X. ^{[14, 15]} ; Bailhache, R. ^[26] ; Bala, R. ^[42] ; Baldisseri, A. ^[43] ; Ball, M. ^[44] ; Balouza, S. ^[45] ; Barbera, R. ^{[46, 47]} ; Barioglio, L. ^{[48, 49]} ; Barnafoldi, G. G. ^[50] ; Barnby, L. S. ^[51] ; Barret, V. ^[52] ; Bartalini, P. ^[19] ; Barth, K. ^[6] ; Bartsch, E. ^[26] ; Baruffaldi, F. ^{[53, 54]} ; Bastid, N. ^[52] ; Basu, S. ^[55] ; Batigne, G. ^[37] ; Batyunya, B. ^[56] ; Bauri, D. ^[57] ; Bazo Alba, J. L. ^[58] ; Bearden, I. G. ^[59] ; Bedda, C. ^[60] ; Behera, N. K. ^[61] ; Belikov, I. ^[62] ; Hechavarria, A. D. C. Bell ^[30] ; Bellini, F. ^[6] ; Bellwied, R. ^[35] ; Belyaev, V. ^[63] ; Bencedi, G. ^[50] ; Beole, S. ^{[48, 49]} ; Bercuci, A. ^[28] ; Berdnikov, Y. ^[64] ; Berenyi, D. ^[50] ; Bertens, R. A. ^[65] ; Berzano, D. ^[18] ; Besoiu, M. G. ^[66] ; Betev, L. ^[6] ; Bhasin, A. ^[42] ; Bhat, I. R. ^[42] ; Bhat, M. A. ^{[67, 68]} ; Bhatt, H. ^[57] ; Bhattacharjee, B. ^[69] ; Bianchi, A. ^{[48, 49]} ; Bianchi, L. ^{[48, 49]} ; Bianchi, N. ^[70] ; Bielcik, J. ^[71] ; Bielcikova, J. ^[2] ; Bilandzic, A. ^{[72, 45]} ; Biro, G. ^[50] ; Biswas, R. ^{[67, 68]} ; Biswas, S. ^{[67, 68]} ; Blair, J. T. ^[73] ; Blau, D. ^[17] ; Blume, C. ^[26] ; Boca, G. ^[74] ; Bock, F. ^{[75, 6]} ; Bogdanov, A. ^[63] ; Boi, S. ^{[76, 77]} ; Boldizsar, L. ^[50] ; Bolozdynya, A. ^[63] ; Bombara, M. ^[78] ; Bonomi, G. ^[79] ; Borel, H. ^[43] ; Borissov, A. ^{[30, 63]} ; Bossi, H. ^[80] ; Botta, E. ^{[48, 49]} ; Bratrud, L. ^[26] ; Braun-Munzinger, P. ^{[14, 15]} ; Bregant, M. ^[81] ; Broz, M. ^[71] ; Brucken, J. ^[82] ; Bruna, E. ^[18] ; Bruno, G. E. ^[83] ; Buckland, M. D. ^[84] ; Budnikov, D. ^[85] ; Buesching, H. ^[26] ; Bufalino, S. ^{[7, 8]} ; Bugnon, O. ^[37] ; Buhler, P. ^[86] ; Buncic, P. ^[6] ; Buthelezi, Z. ^{[87, 88]} ; Butt, J. B. ^[21] ; Buxton, J. T. ^[89] ; Bysiak, S. A. ^[90] ; Caffarri, D. ^[91] ; Caliva, A. ^{[14, 15]} ; Calvo Villar, E. ^[58] ; Camacho, R. S. ^[92] ; Camerini, P. ^{[93, 94]} ; Capon, A. A. ^[86] ; Carnesecchi, F. ^{[22, 23, 10]} ; Caron, R. ^[43] ; Castellanos, J. Castillo ^[43] ; Castro, A. J. ^[65] ; Casula, E. A. R. ^[95] ; Catalano, F. ^{[7, 8]} ; Sanchez, C. Ceballos ^[96] ; Chakraborty, P. ^[57] ; Chandra, S. ^[1] ; Chang, W. ^[19] ; Chapeland, S. ^[6] ; Chartier, M. ^[84] ; Chattopadhyay, S. ^{[1, 97]} ; Chauvin, A. ^{[76, 77]} ; Cheshkov, C. ^[98] ; Cheynis, B. ^[98] ; Barroso, V. Chibante ^[6] ; Chinellato, D. D. ^[16] ; Cho, S. ^[61] ; Chochula, P. ^[6] ; Chowdhury, T. ^[52] ; Christakoglou, P. ^[91] ; Christensen, C. 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N. ^[25] ; Elia, D. ^[96] ; Engel, H. ^[3] ; Epple, E. ^[80] ; Erazmus, B. ^[37] ; Erhardt, F. ^[119] ; Erokhin, A. ^[27] ; Ersdal, M. R. ^[25] ; Espagnon, B. ^[39] ; Eulisse, G. ^[6] ; Evans, D. ^[29] ; Evdokimov, S. ^[120] ; Fabbietti, L. ^{[72, 45]} ; Faggin, M. ^{[53, 54]} ; Faivre, J. ^[102] ; Fan, F. ^[19] ; Fantoni, A. ^[70] ; Fasel, M. ^[75] ; Fecchio, P. ^{[7, 8]} ; Feliciello, A. ^[18] ; Feofilov, G. ^[27] ; Tellez, A. Fernandez ^[92] ; Ferrero, A. ^[43] ; Ferretti, A. ^{[48, 49]} ; Festanti, A. ^[6] ; Feuillard, V. J. G. ^[31] ; Figiel, J. ^[90] ; Filchagin, S. ^[85] ; Finogeev, D. ^[118] ; Fionda, F. M. ^[25] ; Fiorenza, G. ^[96] ; Flor, F. ^[35] ; Foertsch, S. ^[87] ; Foka, P. ^{[14, 15]} ; Fokin, S. ^[17] ; Fragiacomo, E. ^[34] ; Frankenfeld, U. ^{[14, 15]} ; Fuchs, U. ^[6] ; Furget, C. ^[102] ; Furs, A. ^[118] ; Girard, M. Fusco ^{[109, 110]} ; Gaardhoje, J. J. ^[59] ; Gagliardi, M. ^{[48, 49]} ; Gago, A. M. ^[58] ; Gal, A. ^[62] ; Galvan, C. D. ^[121] ; Ganoti, P. ^[122] ; Garabatos, C. ^{[14, 15]} ; Garcia-Solis, E. ^[123] ; Garg, K. ^{[46, 47]} ; Gargiulo, C. ^[6] ; Garibli, A. ^[124] ; Garner, K. ^[30] ; Gasik, P. ^{[72, 45]} ; Gauger, E. F. ^[73] ; Gay Ducati, M. B. ^[125] ; Germain, M. ^[37] ; Ghosh, J. ^[97] ; Ghosh, P. ^[1] ; Ghosh, S. K. ^{[67, 68]} ; Gianotti, P. ^[70] ; Giubellino, P. ^{[18, 14, 15]} ; Giubilato, P. ^{[53, 54]} ; Glaessel, P. ^[31] ; Gomez Coral, D. M. ^[20] ; Ramirez, A. Gomez ^[3] ; Gonzalez, V. ^{[14, 15]} ; Gonzalez-Zamora, P. ^[92] ; Gorbunov, S. ^[111] ; Gorlich, L. ^[90] ; Gotovac, S. ^[126] ; Grabski, V. ^[20] ; Graczykowski, L. K. ^[107] ; Graham, K. L. ^[29] ; Greiner, L. ^[36] ; Grelli, A. ^[60] ; Grigoras, C. ^[6] ; Grigoriev, V. ^[63] ; Grigoryan, A. ^[127] ; Grigoryan, S. ^[56] ; Groettvik, O. S. ^[25] ; Grosa, F. ^{[7, 8]} ; Grosse-Oetringhaus, J. 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E. ^[82] ; Hillemanns, H. ^[6] ; Hills, C. ^[84] ; Hippolyte, B. ^[62] ; Hohlweger, B. ^[45] ; Horak, D. ^[71] ; Hornung, A. ^[26] ; Hornung, S. ^{[14, 15]} ; Hosokawa, R. ^{[32, 99]} ; Hristov, P. ^[6] ; Huang, C. ^[39] ; Hughes, C. ^[65] ; Huhn, P. ^[26] ; Humanic, T. J. ^[89] ; Hushnud, H. ^[97] ; Husova, L. A. ^[30] ; Hussain, N. ^[69] ; Hussain, S. A. ^[21] ; Hutter, D. ^[111] ; Iddon, J. P. ^{[6, 84]} ; Ilkaev, R. ^[85] ; Inaba, M. ^[99] ; Innocenti, G. M. ^[6] ; Ippolitov, M. ^[17] ; Isakov, A. ^[2] ; Islam, M. S. ^[97] ; Ivanov, M. ^{[14, 15]} ; Ivanov, V. ^[64] ; Izucheev, V. ^[120] ; Jacak, B. ^[36] ; Jacazio, N. ^[9] ; Jacobs, P. M. ^[36] ; Jadlovska, S. ^[133] ; Jadlovsky, J. ^[133] ; Jaelani, S. ^[60] ; Jahnke, C. ^[81] ; Jakubowska, M. J. ^[107] ; Janik, M. A. ^[107] ; Janson, T. ^[3] ; Jercic, M. ^[119] ; Jevons, O. ^[29] ; Jin, M. ^[35] ; Jonas, F. ^{[75, 30]} ; Jones, P. G. ^[29] ; Jung, J. ^[26] ; Jung, M. ^[26] ; Jusko, A. ^[29] ; Kalinak, P. ^[134] ; Kalweit, A. ^[6] ; Kaplin, V. ^[63] ; Kar, S. ^[19] ; Uysal, A. Karasu ^[135] ; Karavichev, O. ^[118] ; Karavicheva, T. ^[118] ; Karczmarczyk, P. ^[6] ; Karpechev, E. ^[118] ; Kazantsev, A. ^[17] ; Kebschull, U. ^[3] ; Keidel, R. ^[136] ; Keil, M. ^[6] ; Ketzer, B. ^[44] ; Khabanova, Z. ^[91] ; Khan, A. M. ^[19] ; Khan, S. ^[11] ; Khan, S. A. ^[1] ; Khanzadeev, A. ^[64] ; Kharlov, Y. ^[120] ; Khatun, A. ^[11] ; Khuntia, A. ^[90] ; Kileng, B. ^[130] ; Kim, B. ^{[99, 61]} ; Kim, D. ^[137] ; Kim, D. J. ^[138] ; Kim, E. J. ^[139] ; Kim, H. ^{[137, 140]} ; Kim, J. S. ^[41] ; Kim, J. ^{[137, 31, 139]} ; Kim, M. ^[31] ; Kim, S. ^[141] ; Kim, T. ^[137] ; Kirsch, S. ^{[26, 111]} ; Kisel, I. ^[111] ; Kiselev, S. ^[13] ; Kisiel, A. ^[107] ; Klay, J. L. ^[142] ; Klein, C. ^[26] ; Klein, J. ^[18] ; Klein, S. ^[36] ; Klein-Boesing, C. ^[30] ; Kleiner, M. ^[26] ; Kluge, A. ^[6] ; Knichel, M. L. ^[6] ; Knospe, A. G. ^{[35, 143]} ; Kobdaj, C. ^[144] ; Koehler, M. K. ^[31] ; Kollegger, T. ^{[14, 15]} ; Kondratyev, A. ^[56] ; Kondratyeva, N. ^[63] ; Kondratyuk, E. ^[120] ; Konig, J. ^[26] ; Konopka, P. J. ^[6] ; Koska, L. ^[133] ; Kovalenko, O. ^[113] ; Kovalenko, V. ^[27] ; Kowalski, M. ^[90] ; Kralik, I. ^[134] ; Kravcakova, A. ^[78] ; Kreis, L. ^{[14, 15]} ; Krivda, M. ^{[29, 134]} ; Krizek, F. ^[2] ; Gajdosova, K. Krizkova ^[71] ; Krueger, M. ^[26] ; Kryshen, E. ^[64] ; Krzewicki, M. ^[111] ; Kubera, A. M. ; Kucera, V. ^[61] ; Kuhn, C. ^[62] ; Kuijer, P. G. ^[91] ; Kumar, L. ^[5] ; Kumar, S. ^[57] ; Kundu, S. ^[108] ; Kurashvili, P. ^[113] ; Kurepin, A. ^[118] ; Kurepin, A. B. ^[118] ; Kuryakin, A. ^[85] ; Kushpil, S. ^[2] ; Kvapil, J. ^[29] ; Kweon, M. J. ^[61] ; Kwon, J. Y. ^[61] ; Kwon, Y. ^[137] ; La Pointe, S. L. ^[111] ; La Rocca, P. ^{[46, 47]} ; Lai, Y. 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Affiliation:Show less -

^[1] Homi Bhabha Natl Inst, Ctr Variable Energy Cyclotron, Kolkata - India

^[2] Czech Acad Sci, Inst Nucl Phys, Rez - Czech Republic

^[3] Goethe Univ Frankfurt, Frankfurt Inst Informat, Fachbereich Informat & Math, Frankfurt - Germany

^[4] Lund Univ, Div Particle Phys, Dept Phys, Lund - Sweden

^[5] Panjab Univ, Dept Phys, Chandigarh - India

^[6] European Org Nucl Res CERN, Geneva - Switzerland

^[7] Politecn Torino, Dipartimento DISAT, Turin - Italy

^[8] Sezi INFN, Turin - Italy

^[9] INFN, Sez Bologna, Bologna - Italy

^[10] Ctr Fermi Museo Storico Fis & Ctr Studi & Ricerch, Rome - Italy

^[11] Aligarh Muslim Univ, Dept Phys, Aligarh, Uttar Pradesh - India

^[12] Korea Inst Sci & Technol Informat, Daejeon - South Korea

^[13] NRC Kurchatov Inst ITEP, Moscow - Russia

^[14] GSI Helmholtzzentrum Schwerionenforsch GmbH, Res Div, Darmstadt - Germany

^[15] GSI Helmholtzzentrum Schwerionenforsch GmbH, ExtreMe Matter Inst EMMI, Darmstadt - Germany

^[16] Univ Estadual Campinas UNICAMP, Campinas - Brazil

^[17] Kurchatov Inst, Natl Res Ctr, Moscow - Russia

^[18] INFN, Sez Torino, Turin - Italy

^[19] Cent China Normal Univ, Wuhan - Peoples R China

^[20] Univ Nacl Autonoma Mexico, Inst Fis, Mexico City, DF - Mexico

^[21] COMSATS Univ Islamabad, Islamabad - Pakistan

^[22] Univ Bologna, Dipartimento Fis & Astron, Bologna - Italy

^[23] Sezione Ist Nazl Fis Nucl, Bologna - Italy

^[24] Natl Acad Sci Ukraine, Bogolyubov Inst Theoret Phys, Kiev - Ukraine

^[25] Univ Bergen, Dept Phys & Technol, Bergen - Norway

^[26] Goethe Univ Frankfurt, Inst Kernphys, Frankfurt - Germany

^[27] St Petersburg State Univ, St Petersburg - Russia

^[28] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest - Romania

^[29] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands - England

^[30] Westfal Wilhelms Univ Munster, Inst Kernphys, Munster - Germany

^[31] Heidelberg Univ, Phys Inst, Heidelberg - Germany

^[32] Creighton Univ, Omaha, NE 68178 - USA

^[33] Rudjer Boskovic Inst, Zagreb - Croatia

^[34] INFN, Sez Padova, Padua - Italy

^[35] Univ Houston, Houston, TX - USA

^[36] Lawrence Berkeley Natl Lab, Berkeley, CA - USA

^[37] Univ Nantes, SUBATECH, IMT Atlant, CNRS, IN2P3, Nantes - France

^[38] Univ Oslo, Dept Phys, Oslo - Norway

^[39] Univ Paris Saclay, Univ Paris Sud, Inst Phys Nucl Orsay IPNO, Inst Natl Phys Nucl & Phys Particules IN2P3 CNRS, Orsay - France

^[40] INFN, Sez Catania, Catania - Italy

^[41] Gangneung Wonju Natl Univ, Kangnung - South Korea

^[42] Univ Jammu, Dept Phys, Jammu - India

^[43] Univ Paris Saclay, Dept Phys Nucl DPhN, IRFU, Ctr Etud Saclay CEA, Saclay - France

^[44] Rhein Friedrich Wilhelms Univ Bonn, Helmholtz Inst Strahlen & Kernphys, Bonn - Germany

^[45] Tech Univ Munich, Phys Dept, Munich - Germany

^[46] Sezione Ist Nazl Fis Nucl, Catania - Italy

^[47] Univ Catania, Dipartimento Fis & Astron, Catania - Italy

^[48] Sezione Ist Nazl Fis Nucl, Turin - Italy

^[49] Univ Turin, Dipartimento Fis, Turin - Italy

^[50] Wigner Res Ctr Phys, Budapest - Hungary

^[51] STFC Daresbury Lab, Nucl Phys Grp, Daresbury - England

^[52] Univ Clermont Auvergne, LPC, CNRS, IN2P3, Clermont Ferrand - France

^[53] Sezione Ist Nazl Fis Nucl, Padua - Italy

^[54] Univ Padua, Dipartimento Fis & Astron, Padua - Italy

^[55] Wayne State Univ, Detroit, MI - USA

^[56] Joint Inst Nucl Res JINR, Dubna - Russia

^[57] Indian Inst Technol Bombay IIT, Mumbai, Maharashtra - India

^[58] Pontificia Univ Catolica Peru, Dept Ciencias, Secc Fis, Lima - Peru

^[59] Univ Copenhagen, Niels Bohr Inst, Copenhagen - Denmark

^[60] Utrecht Univ Nikhef, Inst Subat Phys, Utrecht - Netherlands

^[61] Inha Univ, Incheon - South Korea

^[62] Univ Strasbourg, CNRS, IPHC, UMR 7178, F-67000 Strasbourg - France

^[63] NRNU Moscow Engn Phys Inst, Moscow - Russia

^[64] Petersburg Nucl Phys Inst, Gatchina - Russia

^[65] Univ Tennessee, Knoxville, TN - USA

^[66] Inst Space Sci ISS, Bucharest - Romania

^[67] Bose Inst, Dept Phys, Kolkata - India

^[68] Ctr Astroparticle Phys & Space Sci CAPSS, Kolkata - India

^[69] Gauhati Univ, Dept Phys, Gauhati - India

^[70] INFN, Lab Nazl Frascati, Frascati - Italy

^[71] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague - Czech Republic

^[72] Tech Univ Munich, Excellence Cluster Univ, Munich - Germany

^[73] Univ Texas Austin, Austin, TX 78712 - USA

^[74] Univ Pavia, Pavia - Italy

^[75] Oak Ridge Natl Lab, Oak Ridge, TN - USA

^[76] Sezione Ist Nazl Fis Nucl, Cagliari - Italy

^[77] Univ Cagliari, Dipartimento Fis, Cagliari - Italy

^[78] Safarik Univ, Fac Sci, Kosice - Slovakia

^[79] Univ Brescia, Brescia - Italy

^[80] Yale Univ, New Haven, CT - USA

^[81] Univ Sao Paulo, Sao Paulo - Brazil

^[82] Helsinki Inst Phys HIP, Helsinki - Finland

^[83] Politecn Bari, Bari - Italy

^[84] Univ Liverpool, Liverpool, Merseyside - England

^[85] Russian Fed Nucl Ctr VNIIEF, Sarov - Russia

^[86] Stefan Meyer Inst Subatomare Physik SMI, Vienna - Austria

^[87] Natl Res Fdn, IThemba LABS, Somerset West - South Africa

^[88] Univ Witwatersrand, Johannesburg - South Africa

^[89] Ohio State Univ, Columbus, OH 43210 - USA

^[90] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow - Poland

^[91] Nikhef, Natl Inst Subat Phys, Amsterdam - Netherlands

^[92] Univ Autonoma Puebla, High Energy Phys Grp, Puebla - Mexico

^[93] Sezione Ist Nazl Fis Nucl, Trieste - Italy

^[94] Univ Trieste, Dipartimento Fis, Trieste - Italy

^[95] INFN, Sez Cagliari, Cagliari - Italy

^[96] INFN, Sez Bari, Bari - Italy

^[97] Homi Bhabha Natl Inst, Inst Nucl Phys, Kolkata - India

^[98] Univ Lyon 1, Univ Lyon, IPN Lyon, CNRS, IN2P3, Villeurbanne - France

^[99] Univ Tsukuba, Tsukuba, Ibaraki - Japan

^[100] Univ Cape Town, Cape Town - South Africa

^[101] Politecn Torino, Dipartimento DET, Turin - Italy

^[102] Univ Grenoble Alpes, Lab Phys Subatom & Cosmol, CNRS, IN2P3, Grenoble - France

^[103] Univ Piemonte Orientale, Dipartimento Sci & Innovaz Tecnol, Alessandria - Italy

^[104] INFN, Sez Torino, Alessandria - Italy

^[105] Univ Fed ABC, Santo Andre, SP - Brazil

^[106] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City, DF - Mexico

^[107] Warsaw Univ Technol, Warsaw - Poland

^[108] Homi Bhabha Natl Inst, Natl Inst Sci Educ & Res, Jatni - India

^[109] Grp Collegato INFN, Salerno - Italy

^[110] Univ Salerno, Dipartimento Fis ER Caianiello, Salerno - Italy

^[111] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, Frankfurt - Germany

^[112] Indian Inst Technol Indore, Indore - India

^[113] Natl Ctr Nucl Res, Warsaw - Poland

^[114] Sezione Ist Nazl Fis Nucl, Bari - Italy

^[115] Dipartimento Interateneo & Fis M Merlin, Bari - Italy

^[116] Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana - Cuba

^[117] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 - USA

^[118] Acad Sci, Inst Nucl Res, Moscow - Russia

^[119] Univ Zagreb, Dept Phys, Fac Sci, Zagreb - Croatia

^[120] NRC Kurchatov Inst IHEP, Protvino - Russia

^[121] Univ Autonoma Sinaloa, Culiacan, Sinaloa - Mexico

^[122] Natl & Kapodistrian Univ Athens, Sch Sci, Dept Phys, Athens - Greece

^[123] Chicago State Univ, Chicago, IL - USA

^[124] Natl Ctr Nucl Res, Baku - Azerbaijan

^[125] Univ Fed Rio Grande Sul UFRGS, Inst Fis, Porto Alegre, RS - Brazil

^[126] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split - Croatia

^[127] AI AlikhanyanNat Sci Lab Yerevan Phys Inst Fdn, Yerevan - Armenia

^[128] Univ Tokyo, Tokyo - Japan

^[129] Nagasaki Inst Appl Sci, Nagasaki - Japan

^[130] Western Norway Univ Appl Sci, Fac Engn & Sci, Bergen - Norway

^[131] Ctr Invest Estudios Avanzados CINVESTAV, Mexico City, DF - Mexico

^[132] Ctr Invest Estudios Avanzados CINVESTAV, Merida, Yucatan - Mexico

^[133] Tech Univ Kosice, Kosice - Slovakia

^[134] Slovak Acad Sci, Inst Expt Phys, Kosice - Slovakia

^[135] KTO Karatay Univ, Konya - Turkey

^[136] Hsch Worms, Zentrum Technol Transfer & Telekommunikat ZTT, Worms - Germany

^[137] Yonsei Univ, Seoul - South Korea

^[138] Univ Jyvaskyla, Jyvaskyla - Finland

^[139] Jeonbuk Natl Univ, Jeonju - South Korea

^[140] Pusan Natl Univ, Dept Phys, Pusan - South Korea

^[141] Sejong Univ, Dept Phys, Seoul - South Korea

^[142] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 - USA

^[143] China Inst Atom Energy, Beijing - Peoples R China

^[144] Suranaree Univ Technol, Nakhon Ratchasima - Thailand

^[145] Univ South Eastern Norway, Tonsberg - Norway

^[146] INFN, Sez Trieste, Trieste - Italy

^[147] Fudan Univ, Shanghai - Peoples R China

^[148] Moscow MV Lomonosov State Univ, DV SkobeltsynInstitute Nucl, Phys, Moscow - Russia

^[149] Czech Acad Sci, Inst Phys, Prague - Czech Republic

^[150] Univ Foggia, Foggia - Italy

^[151] INFN, Sez Roma, Rome - Italy

^[152] Sezione Ist Nazl Fis Nucl, Rome - Italy

^[153] Univ Roma La Sapienza, Dipartimento Fis, Rome - Italy

^[154] Comenius Univ, Fac Math Phys & Informat, Bratislava - Slovakia

^[155] Aligarh Muslim Univ, Dept Appl Phys, Aligarh, Uttar Pradesh - India

^[156] Budker Inst Nucl Phys, Novosibirsk - Russia

^[157] Univ Rajasthan, Dept Phys, Jaipur, Rajasthan - India

^[158] Univ Wroclaw, Inst Theoret Phys, Wroclaw - Poland

^[159] Homi Bhabha Natl Inst, Inst Phys, Bhubaneswar - India

^[160] Eberhard Karls Univ Tubingen, Phys Inst, Tubingen - Germany

^[161] Hiroshima Univ, Hiroshima - Japan

^[162] Nara Womens Univ NWU, Nara - Japan

^[163] Indonesian Inst Sci, Jakarta - Indonesia

^[164] IN2P3, Ctr Calcul, Villeurbanne - France

^[165] Univ Sci & Technol China, Hefei, Anhui - Peoples R China

• Document type: Journal article
• Source: Physics Letters B; v. 815, APR 10 2021.
• Web of Science Citations: 0

Abstract

The polarization of inclusive J/psi and Upsilon(1S) produced in Pb-Pb collisions at root s(NN) = 5.02 TeV at the LHC is measured with the ALICE detector. The study is carried out by reconstructing the quarkonium through its decay to muon pairs in the rapidity region 2.5 < y < 4 and measuring the polar and azimuthal angular distributions of the muons. The polarization parameters lambda(theta), lambda(phi) and lambda(theta phi) are measured in the helicity and Collins-Soper reference frames, in the transverse momentum interval 2 < p(T) < 10 GeV/c and p(T) < 15 GeV/c for the J/psi and Upsilon(1S), respectively. The polarization parameters for the J/psi are found to be compatible with zero, within a maximum of about two standard deviations at low p(T), for both reference frames and over the whole p(T) range. The values are compared with the corresponding results obtained for pp collisions at root s = 7 and 8 TeV in a similar kinematic region by the ALICE and LHCb experiments. Although with much larger uncertainties, the polarization parameters for Upsilon(1S) production in Pb-Pb collisions are also consistent with zero. (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). (AU)