학술논문

Elliptic flow of electrons from heavy-flavour hadron decays at mid-rapidity in Pb-Pb collisions at s N N = 2.76 TeV
Document Type
Original Paper
Author
Adam, J.Adamová, D.Aggarwal, M. M.Aglieri Rinella, G.Agnello, M.Agrawal, N.Ahammed, Z.Ahmad, S.Ahn, S. U.Aiola, S.Akindinov, A.Alam, S. N.Albuquerque, D. S. D.Aleksandrov, D.Alessandro, B.Alexandre, D.Alfaro Molina, R.Alici, A.Alkin, A.Alme, J.Alt, T.Altinpinar, S.Altsybeev, I.Alves Garcia Prado, C.Andrei, C.Andronic, A.Anguelov, V.Antičić, T.Antinori, F.Antonioli, P.Aphecetche, L.Appelshäuser, H.Arcelli, S.Arnaldi, R.Arnold, O. W.Arsene, I. C.Arslandok, M.Audurier, B.Augustinus, A.Averbeck, R.Azmi, M. D.Badalà, A.Baek, Y. W.Bagnasco, S.Bailhache, R.Bala, R.Balasubramanian, S.Baldisseri, A.Baral, R. C.Barbano, A. M.Barbera, R.Barile, F.Barnaföldi, G. G.Barnby, L. S.Barret, V.Bartalini, P.Barth, K.Bartke, J.Bartsch, E.Basile, M.Bastid, N.Basu, S.Bathen, B.Batigne, G.Batista Camejo, A.Batyunya, B.Batzing, P. C.Bearden, I. G.Beck, H.Bedda, C.Behera, N. K.Belikov, I.Bellini, F.Bello Martinez, H.Bellwied, R.Belmont, R.Belmont-Moreno, E.Beltran, L. G. E.Belyaev, V.Bencedi, G.Beole, S.Berceanu, I.Bercuci, A.Berdnikov, Y.Berenyi, D.Bertens, R. A.Berzano, D.Betev, L.Bhasin, A.Bhat, I. R.Bhati, A. K.Bhattacharjee, B.Bhom, J.Bianchi, L.Bianchi, N.Bianchin, C.Bielčík, J.Bielčíková, J.Bilandzic, A.Biro, G.Biswas, R.Biswas, S.Bjelogrlic, S.Blair, J. T.Blau, D.Blume, C.Bock, F.Bogdanov, A.Bøggild, H.Boldizsár, L.Bombara, M.Bonora, M.Book, J.Borel, H.Borissov, A.Borri, M.Bossú, F.Botta, E.Bourjau, C.Braun-Munzinger, P.Bregant, M.Breitner, T.Broker, T. A.Browning, T. A.Broz, M.Brucken, E. J.Bruna, E.Bruno, G. E.Budnikov, D.Buesching, H.Bufalino, S.Buncic, P.Busch, O.Buthelezi, Z.Butt, J. B.Buxton, J. T.Cabala, J.Caffarri, D.Cai, X.Caines, H.Calero Diaz, L.Caliva, A.Calvo Villar, E.Camerini, P.Carena, F.Carena, W.Carnesecchi, F.Castillo Castellanos, J.Castro, A. J.Casula, E. A. R.Ceballos Sanchez, C.Cepila, J.Cerello, P.Cerkala, J.Chang, B.Chapeland, S.Chartier, M.Charvet, J. L.Chattopadhyay, S.Chattopadhyay, S.Chauvin, A.Chelnokov, V.Cherney, M.Cheshkov, C.Cheynis, B.Chibante Barroso, V.Chinellato, D. D.Cho, S.Chochula, P.Choi, K.Chojnacki, M.Choudhury, S.Christakoglou, P.Christensen, C. H.Christiansen, P.Chujo, T.Chung, S. U.Cicalo, C.Cifarelli, L.Cindolo, F.Cleymans, J.Colamaria, F.Colella, D.Collu, A.Colocci, M.Conesa Balbastre, G.Conesa del Valle, Z.Connors, M. E.Contreras, J. G.Cormier, T. M.Corrales Morales, Y.Cortés Maldonado, I.Cortese, P.Cosentino, M. R.Costa, F.Crkovska, J.Crochet, P.Cruz Albino, R.Cuautle, E.Cunqueiro, L.Dahms, T.Dainese, A.Danisch, M. C.Danu, A.Das, D.Das, I.Das, S.Dash, A.Dash, S.De, S.De Caro, A.de Cataldo, G.de Conti, C.de Cuveland, J.De Falco, A.De Gruttola, D.De Marco, N.De Pasquale, S.De Souza, R. D.Deisting, A.Deloff, A.Dénes, E.Deplano, C.Dhankher, P.Di Bari, D.Di Mauro, A.Di Nezza, P.Di Ruzza, B.Diaz Corchero, M. A.Dietel, T.Dillenseger, P.Divià, R.Djuvsland, Ø.Dobrin, A.Domenicis Gimenez, D.Dönigus, B.Dordic, O.Drozhzhova, T.Dubey, A. K.Dubla, A.Ducroux, L.Dupieux, P.Ehlers, R. J.Elia, D.Endress, E.Engel, H.Epple, E.Erazmus, B.Erdemir, I.Erhardt, F.Espagnon, B.Estienne, M.Esumi, S.Eum, J.Evans, D.Evdokimov, S.Eyyubova, G.Fabbietti, L.Fabris, D.Faivre, J.Fantoni, A.Fasel, M.Feldkamp, L.Feliciello, A.Feofilov, G.Ferencei, J.Fernández Téllez, A.Ferreiro, E. G.Ferretti, A.Festanti, A.Feuillard, V. J. G.Figiel, J.Figueredo, M. A. S.Filchagin, S.Finogeev, D.Fionda, F. M.Fiore, E. M.Fleck, M. G.Floris, M.Foertsch, S.Foka, P.Fokin, S.Fragiacomo, E.Francescon, A.Francisco, A.Frankenfeld, U.Fronze, G. G.Fuchs, U.Furget, C.Furs, A.Fusco Girard, M.Gaardhøje, J. J.Gagliardi, M.Gago, A. M.Gajdosova, K.Gallio, M.Galvan, C. D.Gangadharan, D. R.Ganoti, P.Gao, C.Garabatos, C.Garcia-Solis, E.Gargiulo, C.Gasik, P.Gauger, E. F.Germain, M.Gheata, M.Ghosh, P.Ghosh, S. K.Gianotti, P.Giubellino, P.Giubilato, P.Gladysz-Dziadus, E.Glässel, P.Goméz Coral, D. M.Gomez Ramirez, A.Gonzalez, A. S.Gonzalez, V.González-Zamora, P.Gorbunov, S.Görlich, L.Gotovac, S.Grabski, V.Grachov, O. A.Graczykowski, L. K.Graham, K. L.Grelli, A.Grigoras, A.Grigoras, C.Grigoriev, V.Grigoryan, A.Grigoryan, S.Grinyov, B.Grion, N.Gronefeld, J. M.Grosse-Oetringhaus, J. F.Grosso, R.Gruber, L.Guber, F.Guernane, R.Guerzoni, B.Gulbrandsen, K.Gunji, T.Gupta, A.Gupta, R.Haake, R.Hadjidakis, C.Haiduc, M.Hamagaki, H.Hamar, G.Hamon, J. C.Harris, J. W.Harton, A.Hatzifotiadou, D.Hayashi, S.Heckel, S. T.Hellbär, E.Helstrup, H.Herghelegiu, A.Herrera Corral, G.Hess, B. A.Hetland, K. F.Hillemanns, H.Hippolyte, B.Horak, D.Hosokawa, R.Hristov, P.Hughes, C.Humanic, T. J.Hussain, N.Hussain, T.Hutter, D.Hwang, D. S.Ilkaev, R.Inaba, M.Incani, E.Ippolitov, M.Irfan, M.Isakov, V.Ivanov, M.Ivanov, V.Izucheev, V.Jacak, B.Jacazio, N.Jacobs, P. M.Jadhav, M. B.Jadlovska, S.Jadlovsky, J.Jahnke, C.Jakubowska, M. J.Janik, M. A.Jayarathna, P. H. S. Y.Jena, C.Jena, S.Jimenez Bustamante, R. T.Jones, P. G.Jusko, A.Kalinak, P.Kalweit, A.Kang, J. H.Kaplin, V.Kar, S.Karasu Uysal, A.Karavichev, O.Karavicheva, T.Karayan, L.Karpechev, E.Kebschull, U.Keidel, R.Keijdener, D. L. D.Keil, M.Mohisin Khan, M.Khan, P.Khan, S. A.Khanzadeev, A.Kharlov, Y.Kileng, B.Kim, D. W.Kim, D. J.Kim, D.Kim, H.Kim, J. S.Kim, J.Kim, M.Kim, S.Kim, T.Kirsch, S.Kisel, I.Kiselev, S.Kisiel, A.Kiss, G.Klay, J. L.Klein, C.Klein, J.Klein-Bösing, C.Klewin, S.Kluge, A.Knichel, M. L.Knospe, A. G.Kobdaj, C.Kofarago, M.Kollegger, T.Kolojvari, A.Kondratiev, V.Kondratyeva, N.Kondratyuk, E.Konevskikh, A.Kopcik, M.Kour, M.Kouzinopoulos, C.Kovalenko, O.Kovalenko, V.Kowalski, M.Koyithatta Meethaleveedu, G.Králik, I.Kravčáková, A.Krivda, M.Krizek, F.Kryshen, E.Krzewicki, M.Kubera, A. M.Kučera, V.Kuhn, C.Kuijer, P. G.Kumar, A.Kumar, J.Kumar, L.Kumar, S.Kurashvili, P.Kurepin, A.Kurepin, A. B.Kuryakin, A.Kweon, M. J.Kwon, Y.La Pointe, S. L.La Rocca, P.Ladron de Guevara, P.Lagana Fernandes, C.Lakomov, I.Langoy, R.Lapidus, K.Lara, C.Lardeux, A.Lattuca, A.Laudi, E.Lea, R.Leardini, L.Lee, S.Lehas, F.Lehner, S.Lemmon, R. C.Lenti, V.Leogrande, E.León Monzón, I.León Vargas, H.Leoncino, M.Lévai, P.Li, S.Li, X.Lien, J.Lietava, R.Lindal, S.Lindenstruth, V.Lippmann, C.Lisa, M. A.Ljunggren, H. M.Lodato, D. F.Loenne, P. I.Loginov, V.Loizides, C.Lopez, X.López Torres, E.Lowe, A.Luettig, P.Lunardon, M.Luparello, G.Lupi, M.Lutz, T. H.Maevskaya, A.Mager, M.Mahajan, S.Mahmood, S. M.Maire, A.Majka, R. D.Malaev, M.Maldonado Cervantes, I.Malinina, L.Mal’Kevich, D.Malzacher, P.Mamonov, A.Manko, V.Manso, F.Manzari, V.Mao, Y.Marchisone, M.Mareš, J.Margagliotti, G. V.Margotti, A.Margutti, J.Marín, A.Markert, C.Marquard, M.Martin, N. A.Martinengo, P.Martínez, M. I.Martínez García, G.Martinez Pedreira, M.Mas, A.Masciocchi, S.Masera, M.Masoni, A.Mastroserio, A.Matyja, A.Mayer, C.Mazer, J.Mazzoni, M. A.Mcdonald, D.Meddi, F.Melikyan, Y.Menchaca-Rocha, A.Meninno, E.Mercado Pérez, J.Meres, M.Mhlanga, S.Miake, Y.Mieskolainen, M. M.Mikhaylov, K.Milano, L.Milosevic, J.Mischke, A.Mishra, A. N.Miskowiec, D.Mitra, J.Mitu, C. M.Mohammadi, N.Mohanty, B.Molnar, L.Montaño Zetina, L.Montes, E.Moreira De Godoy, D. A.Moreno, L. A. P.Moretto, S.Morreale, A.Morsch, A.Muccifora, V.Mudnic, E.Mühlheim, D.Muhuri, S.Mukherjee, M.Mulligan, J. D.Munhoz, M. G.Münning, K.Munzer, R. H.Murakami, H.Murray, S.Musa, L.Musinsky, J.Naik, B.Nair, R.Nandi, B. K.Nania, R.Nappi, E.Naru, M. U.Natal da Luz, H.Nattrass, C.Navarro, S. R.Nayak, K.Nayak, R.Nayak, T. K.Nazarenko, S.Nedosekin, A.Negrao De Oliveira, R. A.Nellen, L.Ng, F.Nicassio, M.Niculescu, M.Niedziela, J.Nielsen, B. S.Nikolaev, S.Nikulin, S.Nikulin, V.Noferini, F.Nomokonov, P.Nooren, G.Noris, J. C. C.Norman, J.Nyanin, A.Nystrand, J.Oeschler, H.Oh, S.Oh, S. K.Ohlson, A.Okatan, A.Okubo, T.Oleniacz, J.Oliveira Da Silva, A. C.Oliver, M. H.Onderwaater, J.Oppedisano, C.Orava, R.Oravec, M.Ortiz Velasquez, A.Oskarsson, A.Otwinowski, J.Oyama, K.Ozdemir, M.Pachmayer, Y.Pagano, D.Pagano, P.Paić, G.Pal, S. K.Palni, P.Pan, J.Pandey, A. K.Papikyan, V.Pappalardo, G. S.Pareek, P.Park, W. J.Parmar, S.Passfeld, A.Paticchio, V.Patra, R. N.Paul, B.Pei, H.Peitzmann, T.Peng, X.Pereira Da Costa, H.Peresunko, D.Perez Lezama, E.Peskov, V.Pestov, Y.Petráček, V.Petrov, V.Petrovici, M.Petta, C.Piano, S.Pikna, M.Pillot, P.Pimentel, L. O. D. L.Pinazza, O.Pinsky, L.Piyarathna, D. B.Ploskon, M.Planinic, M.Pluta, J.Pochybova, S.Podesta-Lerma, P. L. M.Poghosyan, M. G.Polichtchouk, B.Poljak, N.Poonsawat, W.Pop, A.Poppenborg, H.Porteboeuf-Houssais, S.Porter, J.Pospisil, J.Prasad, S. K.Preghenella, R.Prino, F.Pruneau, C. A.Pshenichnov, I.Puccio, M.Puddu, G.Pujahari, P.Punin, V.Putschke, J.Qvigstad, H.Rachevski, A.Raha, S.Rajput, S.Rak, J.Rakotozafindrabe, A.Ramello, L.Rami, F.Raniwala, R.Raniwala, S.Räsänen, S. S.Rascanu, B. T.Rathee, D.Ravasenga, I.Read, K. F.Redlich, K.Reed, R. J.Rehman, A.Reichelt, P.Reidt, F.Ren, X.Renfordt, R.Reolon, A. R.Reshetin, A.Reygers, K.Riabov, V.Ricci, R. A.Richert, T.Richter, M.Riedler, P.Riegler, W.Riggi, F.Ristea, C.Rodríguez Cahuantzi, M.Rodriguez Manso, A.Røed, K.Rogochaya, E.Rohr, D.Röhrich, D.Ronchetti, F.Ronflette, L.Rosnet, P.Rossi, A.Roukoutakis, F.Roy, A.Roy, C.Roy, P.Rubio Montero, A. J.Rui, R.Russo, R.Ryabinkin, E.Ryabov, Y.Rybicki, A.Saarinen, S.Sadhu, S.Sadovsky, S.Šafařík, K.Sahlmuller, B.Sahoo, P.Sahoo, R.Sahoo, S.Sahu, P. K.Saini, J.Sakai, S.Saleh, M. A.Salzwedel, J.Sambyal, S.Samsonov, V.Šándor, L.Sandoval, A.Sano, M.Sarkar, D.Sarkar, N.Sarma, P.Scapparone, E.Scarlassara, F.Schiaua, C.Schicker, R.Schmidt, C.Schmidt, H. R.Schmidt, M.Schuchmann, S.Schukraft, J.Schutz, Y.Schwarz, K.Schweda, K.Scioli, G.Scomparin, E.Scott, R.Šefčík, M.Seger, J. E.Sekiguchi, Y.Sekihata, D.Selyuzhenkov, I.Senosi, K.Senyukov, S.Serradilla, E.Sevcenco, A.Shabanov, A.Shabetai, A.Shadura, O.Shahoyan, R.Shangaraev, A.Sharma, A.Sharma, M.Sharma, M.Sharma, N.Sheikh, A. I.Shigaki, K.Shou, Q.Shtejer, K.Sibiriak, Y.Siddhanta, S.Sielewicz, K. M.Siemiarczuk, T.Silvermyr, D.Silvestre, C.Simatovic, G.Simonetti, G.Singaraju, R.Singh, R.Singhal, V.Sinha, T.Sitar, B.Sitta, M.Skaali, T. B.Slupecki, M.Smirnov, N.Snellings, R. J. M.Snellman, T. W.Song, J.Song, M.Song, Z.Soramel, F.Sorensen, S.Sozzi, F.Spiriti, E.Sputowska, I.Spyropoulou-Stassinaki, M.Stachel, J.Stan, I.Stankus, P.Stenlund, E.Steyn, G.Stiller, J. H.Stocco, D.Strmen, P.Suaide, A. A. P.Sugitate, T.Suire, C.Suleymanov, M.Suljic, M.Sultanov, R.Šumbera, M.Sumowidagdo, S.Szabo, A.Szarka, I.Szczepankiewicz, A.Szymanski, M.Tabassam, U.Takahashi, J.Tambave, G. J.Tanaka, N.Tarhini, M.Tariq, M.Tarzila, M. G.Tauro, A.Tejeda Muñoz, G.Telesca, A.Terasaki, K.Terrevoli, C.Teyssier, B.Thäder, J.Thakur, D.Thomas, D.Tieulent, R.Tikhonov, A.Timmins, A. R.Toia, A.Trogolo, S.Trombetta, G.Trubnikov, V.Trzaska, W. H.Tsuji, T.Tumkin, A.Turrisi, R.Tveter, T. S.Ullaland, K.Uras, A.Usai, G. L.Utrobicic, A.Vala, M.Valencia Palomo, L.Van Der Maarel, J.Van Hoorne, J. W.van Leeuwen, M.Vanat, T.Vande Vyvre, P.Varga, D.Vargas, A.Vargyas, M.Varma, R.Vasileiou, M.Vasiliev, A.Vauthier, A.Vázquez Doce, O.Vechernin, V.Veen, A. M.Veldhoen, M.Velure, A.Vercellin, E.Vergara Limón, S.Vernet, R.Vickovic, L.Viinikainen, J.Vilakazi, Z.Villalobos Baillie, O.Villatoro Tello, A.Vinogradov, A.Vinogradov, L.Virgili, T.Vislavicius, V.Viyogi, Y. P.Vodopyanov, A.Völkl, M. A.Voloshin, K.Voloshin, S. A.Volpe, G.von Haller, B.Vorobyev, I.Vranic, D.Vrláková, J.Vulpescu, B.Wagner, B.Wagner, J.Wang, H.Wang, M.Watanabe, D.Watanabe, Y.Weber, M.Weber, S. G.Weiser, D. F.Wessels, J. P.Westerhoff, U.Whitehead, A. M.Wiechula, J.Wikne, J.Wilk, G.Wilkinson, J.Willems, G. A.Williams, M. C. S.Windelband, B.Winn, M.Yalcin, S.Yang, P.Yano, S.Yin, Z.Yokoyama, H.Yoo, I.-K.Yoon, J. H.Yurchenko, V.Zaborowska, A.Zaccolo, V.Zaman, A.Zampolli, C.Zanoli, H. J. C.Zaporozhets, S.Zardoshti, N.Zarochentsev, A.Závada, P.Zaviyalov, N.Zbroszczyk, H.Zgura, I. S.Zhalov, M.Zhang, H.Zhang, X.Zhang, Y.Zhang, C.Zhang, Z.Zhao, C.Zhigareva, N.Zhou, D.Zhou, Y.Zhou, Z.Zhu, H.Zhu, J.Zichichi, A.Zimmermann, A.Zimmermann, M. B.Zinovjev, G.Zyzak, M.The ALICE collaboration
Source
Journal of High Energy Physics. September 2016 2016(9):1-41
Subject
Heavy Ion Experiments
Language
English
ISSN
1029-8479
Abstract
Abstract:The elliptic flow of electrons from heavy-flavour hadron decays at mid-rapidity (|y| < 0.7) is measured in Pb-Pb collisions at sNN=2.76 TeV with ALICE at the LHC. The particle azimuthal distribution with respect to the reaction plane can be parametrized with a Fourier expansion, where the second coefficient (v2) represents the elliptic flow. The v2 coefficient of inclusive electrons is measured in three centrality classes (0–10%, 10–20% and 20–40%) with the event plane and the scalar product methods in the transverse momentum (pT) intervals 0.5–13 GeV/c and 0.5–8 GeV/c, respectively. After subtracting the background, mainly from photon conversions and Dalitz decays of neutral mesons, a positive v2 of electrons from heavy-flavour hadron decays is observed in all centrality classes, with a maximum significance of 5.9σ in the interval 2 < pT < 2.5 GeV/c in semi-central collisions (20–40%). The value of v2 decreases towards more central collisions at low and intermediate pT (0.5 < pT < 3 GeV/c). The v2 of electrons from heavy-flavour hadron decays at mid-rapidity is found to be similar to the one of muons from heavy-flavour hadron decays at forward rapidity (2.5 < y < 4). The results are described within uncertainties by model calculations including substantial elastic interactions of heavy quarks with an expanding strongly-interacting medium.