Direct photon elliptic flow in Pb-Pb collisions at root s(NN)=2.76 TeV

Acharya, S; Acosta, F. T; Adamova, D; Adolfsson, J; Aggarwal, M. M; Rinella,; Aglieri and Agnello, G.; M,; Agrawal, N; Ahammed, Z; Ahn, S. U; Aiola, S; Akindinov, A; Al-Turany, M; Alam, S. N; Albuquerque, D. S. D; Aleksandrov, D; Alessandro, B; Alfaro Molina, R; Ali, Y; Alici, A; Alkin, A; Alme, J; Alt, T; Altenkamper, L; Altsybeev,; I and Anaam,; M. N.,; Andrei, C; Andreou, D; Andrews, H. A; Andronic, A; Angeletti, M; Anguelov,; V and Anson,; C,; Anticic, T; Antinori, F; Antonioli, P; Anwar, R; Apadula, N; Aphecetche, L; Appelshaeuser, H; Arcelli, S; Arnaldi, R; Arnold, O. W; Arsene, I. C; Arslandok, M; Audurier, B; Augustinus, A; Averbeck, R; Azmi, M. D; Badala, A; Baek, Y. W; Bagnasco, S; Bailhache, R; Bala, R; Baldisseri, A; Ball, M; Baral, R. C; Barbano, A. M; Barbera, R; Barile, F; Barioglio, L; Barnafoldi, G. G; Barnby, L. S; Barret,; V and Bartalini,; P,; Barth, K; Bartsch, E; Bastid, N; Basu, S; Batigne, G; Batyunya, B; Batzing, P. C; Bazo Alba, J. L; Bearden, I. G; Beck, H; Bedda, C; Behera, N. K; Belikov,; I and Bellini,; F,; Bello Martinez, H; Bellwied, R; Beltran, L. G. E; Belyaev,; V and Bencedi,; G,; Beole, S; Bercuci, A; Berdnikov, Y; Berenyi, D; Bertens, R. A; Berzano, D; Betev, L; Bhaduri, P. P; Bhasin, A; Bhat, I. R; Bhatt, H; Bhattacharjee, B; Bhom, J; Bianchi, A; Bianchi, L; Bianchi, N; Bielcik, J; Bielcikova, J; Bilandzic, A; Biro, G; Biswas, R; Biswas, S; Blair, J. T; Blau, D; Blume, C; Boca, G; Bock, F; Bogdanov, A; Boldizsar, L; Bombara, M; Bonomi, G; Bonora, M; Borel, H; Borissov, A; Borri, M; Botta, E; Bourjau, C; Bratrud, L; Braun-Munzinger, P; Bregant, M; Broker, T. A; Broz, M; Brucken, E. J; Bruna, E; Bruno, G. E; Budnikov, D; Buesching, H; Bufalino, S; Buhler, P; Buncic, P; Busch, O; Buthelezi, Z; Butt, J. B; Buxton, J. T; Cabala, J; Caffarri, D; Caines, H; Caliva, A; Calvo Villar, E; Camacho, R. S; Camerini, P; Capon, A. A; Carena, F; Carena, W; Carnesecchi, F; Castellanos,; Castillo and Castro, J.; A. J.,; Casula, E. A. R; Ceballos Sanchez, C; Chandra, S; Chang, B; Chang, W; Chapeland, S; Chartier, M; Chattopadhyay, S; Chattopadhyay, S; Chauvin, A; Cheshkov, C; Cheynis, B; Barroso,; Chibante and Chinellato, V.; D. D.,; Cho, S; Chochula, P; Chowdhury, T; 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; Concas, M; Balbastre,; Conesa and del Valle, G.; Conesa and Contreras, Z.; J. G.,; Cormier, T. M; Morales,; Corrales and Cortese, Y.; P,; Cosentino, M. R; Costa, F; Costanza, S; Crkovska, J; Crochet, P; Cuautle, E; Cunqueiro, L; Dahms, T; Dainese, A; Dani, S; Danisch, M. C; Danu, A; Das, D; Das,; I and 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; Degenhardt, H. F; Deisting, A; Deloff, A; Delsanto, S; Deplano, C; Dhankher, P; Di Bari, D; Di Mauro, A; Di Ruzza, B; Diaz, R. A; Dietel, T; Dillenseger, P; Ding, Y; Divia, R; Djuvsland, O; Dobrin, A; Domenicis Gimenez, D; Doenigus, B; Dordic, O; Doremalen, L. V. R; Dubey, A. K; Dubla, A; Ducroux, L; Dudi, S; Duggal, A. K; Dukhishyam, M; Dupieux, P; Ehlers, R. J; Elia, D; Endress, E; Engel, H; Epple, E; Erazmus, B; Erhardt, F; Ersdal, M. R; Espagnon, B; Eulisse, G; Eum, J; Evans, D; Evdokimov, S; Fabbietti, L; Faggin, M; Faivre, J; Fantoni, A; Fasel, M; Feldkamp, L; Feliciello, A; Feofilov, G; Fernandez Tellez, A; Ferretti, A; Festanti, A; Feuillard, V. J. G; Figiel, J; Figueredo, M. A. S; Filchagin, S; Finogeev, D; Fionda, F. M; Fiorenza, G; Flor, F; 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; Girard,; Fusco and Gaardhoje, M.; J. J.,; Gagliardi, M; Gago, A. M; Gajdosova, K; Gallio, M; Galvan, C. D; Ganoti, P; Garabatos, C; Garcia-Solis, E; Garg, K; Gargiulo, C; Gasik, P; Gauger, E. F; Gay Ducati, M. B; Germain, M; Ghosh, J; Ghosh, P; Ghosh, S. K; Gianotti, P; Giubellino, P; Giubilato, P; Glaessel, P; Gomez Coral, D. M; Ramirez,; Gomez and Gonzalez, A.; V and Gonzalez-Zamora,; P,; Gorbunov, S; Gorlich, L; Gotovac, S; Grabski,; V and Graczykowski,; L. K.,; Graham, K. L; Greiner, L; Grelli, A; Grigoras, C; Grigoriev,; V and Grigoryan,; A,; Grigoryan, S; Gronefeld, J. M; Grosa, F; Grosse-Oetringhaus, J. F; Grosso, R; Guernane, R; Guerzoni, B; Guittiere, M; Gulbrandsen, K; Gunji, T; Gupta, A; Gupta, R; Guzman, I. B; Haake, R; Habib, M. K; Hadjidakis, C; Hamagaki, H; Hamar, G; Hamid, M; Hamon, J. C; Hannigan, R; Haque, M. R; Harris, J. W; Harton, A; Hassan, H; Hatzifotiadou, D; Hayashi, S; Heckel, S. T; Hellbaer, E; Helstrup, H; Herghelegiu, A; Hernandez, E. G; Herrera Corral, G; Herrmann, F; Hetland, K. F; Hilden, T. E; Hillemanns, H; Hills, C; Hippolyte, B; Hohlweger, B; Horak, D; Hornung, S; Hosokawa, R; Hota, J; Hristov, P; Huang, C; Hughes, C; Huhn, P; Humanic, T. J; Hushnud, H; Hussain, N; Hussain, T; Hutter, D; Hwang, D. S; Iddon, J. P; Iga Buitron, S. A; Ilkaev, R; Inaba, M; Ippolitov, M; Islam, M. S; Ivanov, M; Ivanov,; V and Izucheev,; V and Jacak,; B,; Jacazio, N; Jacobs, P. M; Jadhav, M. B; Jadlovska, S; Jadlovsky, J; Jaelani, S; Jahnke, C; Jakubowska, M. J; Janik, M. A; Jena, C; Jercic, M; Jevons, O; Bustamante,; Jimenez and Jin, R. T.; M,; Jones, P. G; Jusko, A; Kalinak, P; Kalweit, A; Kang, J. H; Kaplin,; V and Kar,; S,; Uysal,; Karasu and Karavichev, A.; O,; Karavicheva, T; Karczmarczyk, P; Karpechev, E; Kebschull, U; Keidel, R; Keijdener, D. L. D; Keil, M; Ketzer, B; Khabanova, Z; Khan, A. M; Khan, S; Khan, S. A; Khanzadeev, A; Kharlov, Y; Khatun, A; Khuntia, A; Kielbowicz, M. M; Kileng, B; Kim, B; Kim, D; Kim, D. J; Kim, E. J; Kim, H; Kim, J. S; Kim, J; Kim, M; Kim, S; Kim, T; Kirsch, S; Kisel,; I and Kiselev,; S,; Kisiel, A; Klay, J. L; Klein, C; Klein, J; Klein-Boesing, C; Klewin, S; Kluge, A; Knichel, M. L; Knospe, A. G; Kobdaj, C; Kofarago, M; Koehler, M. K; Kollegger, T; Kondratyeva, N; Kondratyuk, E; Konevskikh, A; Konyushikhin, M; Kovalenko, O; Kovalenko,; V and Kowalski,; M,; Kralik,; I and Kravcakova,; A,; Kreis, L; Krivda, M; Krizek, F; Krueger, M; Kryshen, E; Krzewicki, M; Kubera, A. M; Kucera,; V and Kuhn,; C,; Kuijer, P. G; Kumar, J; Kumar, L; Kumar, S; Kundu, S; Kurashvili, P; Kurepin, A; Kurepin, A. B; Kuryakin, A; Kushpil, S; Kvapil, J; Kweon, M. J; Kwon, Y; La Pointe, S. L; La Rocca, P; Lai, Y. S; Lakomov,; I and Langoy,; R,; Lapidus, K; Lardeux, A; Larionov, P; Laudi, E; Lavicka, R; Lea, R; Leardini, L; Lee, S; Lehas, F; Lehner, S; Lehrbach, J; Lemmon, R. C; Monzon, Leon; I and Levai,; P,; Li, X; X. L, Li; Lien, J; Lietava, R; Lim, B; Lindal, S; Lindenstruth,; V and Lindsay,; S. W.,; Lippmann, C; Lisa, M. A; Litichevskyi,; V and Liu,; A,; Ljunggren, H. M; Llope, W. J; Lodato, D. F; Loginov,; V and Loizides,; C,; Loncar, P; Lopez, X; Lopez Torres, E; Lowe, A; Luettig, P; Luhder, J. R; Lunardon, M; Luparello, G; Lupi, M; Maevskaya, A; Mager, M; Mahmood, S. M; Maire, A; Majka, R. D; Malaev, M; Malik, Q. W; Malinina, L; Mal'Kevich, D; Malzacher, P; Mamonov, A; Manko,; V and Manso,; F,; Manzari,; V and Mao,; Y,; Marchisone, M; Mares, J; Margagliotti,; V,; G,; Margotti, A; Margutti, J; Marin, A; Markert, C; Marquard, M; Martin, N. A; Martinengo, P; Martinez, J. L; Martinez,; I,; M,; Garcia,; Martinez and Pedreira, G.; Martinez and Masciocchi, M.; S,; Masera, M; Masoni, A; Massacrier, L; Masson, E; Mastroserio, A; Mathis, A. M; Matuoka, P. F. T; Matyja, A; Mayer, C; Mazzilli, M; Mazzoni, M. A; Meddi, F; Melikyan, Y; Menchaca-Rocha, A; Meninno, E; Perez,; Mercado and Meres, J.; M,; Meza, C. S; Mhlanga, S; Miake, Y; Micheletti, L; Mieskolainen, M. M; Mihaylov, D. L; Mikhaylov, K; Mischke, A; Mishra, A. N; Miskowiec, D; Mitra, J; Mitu, C. M; Mohammadi, N; Mohanty, A. P; Mohanty, B; Mohisinkhan, M; Godoy, De; Moreira and Moreno, D. A.; L. A. P.,; Moretto, S; Morreale, A; Morsch, A; Muccifora,; V and Mudnic,; E,; Muehlheim, D; Muhuri, S; Mukherjee, M; Mulligan, J. D; Munhoz, M. G; Muenning, K; Munoz, M. I. A; Munzer, R. H; Murakami, H; Murray, S; Musa, L; Musinsky, J; Myers, C. J; Myrcha, J. W; Naik, B; Nair, R; Nandi, B. K; Nania, R; Nappi, E; Narayan, A; Naru, M. U; Nassirpour, A. F; Natal da Luz, H; Nattrass, C; Navarro, S. R; Nayak, K; Nayak, R; Nayak, T. K; Nazarenko, S; Oliveira, De; Negrao and Nellen, R. A.; L,; Nesbo,; V,; S,; Neskovic, G; Ng, F; Nicassio, M; Niedziela, J; Nielsen, B. S; Nikolaev, S; Nikulin, S; Nikulin,; V and Noferini,; F,; Nomokonov, P; Nooren, G; Noris, J. C. C; Norman, J; Nyanin, A; Nystrand, J; Oh, H; Ohlson, A; 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; Pachmayer, Y; Pacik,; V and Pagano,; D,; Paic, G; Palni, P; Pan, J; Pandey, A. K; Panebianco, S; Papikyan,; V and Pareek,; P,; Park, J; Parkkila, J. E; Parmar, S; Passfeld, A; Pathak, S. P; Patra, R. N; Paul, B; Pei, H; Peitzmann, T; Peng, X; Pereira, L. G; Costa, Da; Pereira and Peresunko, H.; D,; Lezama,; Perez and Peskov, E.; V and Pestov,; Y,; Petracek,; V and Petrovici,; M,; Petta, C; Pezzi, R. P; Piano, S; Pikna, M; Pillot, P; Pimentel, L. O. D. L; Pinazza, O; Pinsky, L; Pisano, S; Piyarathna, D. B; Ploskon, M; Planinic, M; Pliquett, F; 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; Pozdniakov,; V and Prasad,; S. K.,; Preghenella, R; Prino, F; Pruneau, C. A; Pshenichnov,; I and Puccio,; M,; Punin,; V and Putschke,; J,; Raha, S; Rajput, S; Rak, J; Rakotozafindrabe, A; Ramello, L; Rami, F; Raniwala, R; Raniwala, S; Rasanen, S. S; Rascanu, B. T; Ratza,; V and Ravasenga,; I and Read,; K. F.,; Redlich, K; Rehman, A; Reichelt, P; Reidt, F; Ren, X; Renfordt, R; Reshetin, A; Revol,; J-P and Reygers,; K,; Riabov,; V and Richert,; T,; Richter, M; Riedler, P; Riegler, W; Riggi, F; Ristea, C; Rode, S. P; Rodriguez Cahuantzi, M; Roed, K; Rogalev, R; Rogochaya, E; Rohr, D; Rohrich, D; Rokita, P. S; Ronchetti, F; Rosas, E. D; Roslon, K; Rosnet, P; Rossi, A; Rotondi, A; Roukoutakis, F; Roy, C; Roy, P; Rueda,; V,; O,; Rui, R; Rumyantsev, B; Rustamov, A; Ryabinkin, E; Ryabov, Y; Rybicki, A; Saarinen, S; Sadhu, S; Sadovsky, S; Safarik, K; Saha, S. K; Sahoo, B; Sahoo, P; Sahoo, R; Sahoo, S; Sahu, P. K; Saini, J; Sakai, S; Saleh, M. A; Sambyal, S; Samsonov,; V and Sandoval,; A,; Sarkar, A; Sarkar, D; Sarkar, N; Sarma, P; Sas, M. H. P; Scapparone, E; Scarlassara, F; Schaefer, B; Scheid, H. S; Schiaua, C; Schicker, R; Schmidt, C; Schmidt, H. R; Schmidt, M. O; Schmidt, M; Schmidt,; V,; N,; Schukraft, J; Schutz, Y; Schwarz, K; Schweda, K; Scioli, G; Scomparin, E; Sefcik, M; Seger, J. E; Sekiguchi, Y; Sekihata, D; Selyuzhenkov,; I and Senosi,; K,; Senyukov, S; Serradilla, E; Sett, P; Sevcenco, A; Shabanov, A; Shabetai, A; Shahoyan, R; Shaikh, W; Shangaraev, A; Sharma, A; Sharma, M; Sharma, N; Sheikh,; I,; A,; Shigaki, K; Shimomura, M; Shirinkin, S; Shou, Q; Shtejer, K; Sibiriak, Y; Siddhanta, S; Sielewicz, K. M; Siemiarczuk, T; Silvermyr, D; Simatovic, G; Simonetti, G; Singaraju, R; Singh, R; Singhal,; V and Sinha,; T,; Sitar, B; Sitta, M; Skaali, T. B; Slupecki, M; Smirnov, N; Snellings, R. J. M; Snellman, T. W; Song, J; Soramel, F; Sorensen, S; Sozzi, F; Sputowska,; I and Stachel,; J,; Stan,; I and Stankus,; P,; Stenlund, E; Stocco, D; Storetvedt, M. M; Strmen, P; Suaide, A. A. P; Sugitate, T; Suire, C; Suleymanov, M; Suljic, M; Sultanov, R; Sumbera, M; Sumowidagdo, S; Suzuki, K; Swain, S; Szabo, A; Szarka,; I and Tabassam,; U,; Takahashi, J; Tambave, G. J; Tanaka, N; Tarhini, M; Tariq, M; Tarzila, M. G; Tauro, A; Tejeda Munoz, G; Telesca, A; Terrevoli, C; Teyssier, B; Thakur, D; Thakur, S; Thomas, D; Thoresen, F; Tieulent, R; Tikhonov, A; Timmins, A. R; Toia, A; Topilskaya, N; Toppi, M; Torres, S. R; Tripathy, S; Trogolo, S; Trombetta, G; Tropp, L; Trubnikov,; V and Trzaska,; W. H.,; Trzcinski, T. P; Trzeciak, B. A; Tsuji, T; Tumkin, A; Turrisi, R; Tveter, T. S; Ullaland, K; Umaka, E. N; Uras, A; Usai, G. L; Utrobicic, A; Vala, M; Van Hoorne, J. W; van Leeuwen, M; Vande Vyvre, P; Varga, D; Vargas, A; Vargyas, M; Varma, R; Vasileiou, M; Vasiliev, A; Vauthier, A; Doce,; Vazquez and Vechernin, O.; V,; Veen, A. M; Vercellin, E; Vergara Limon, S; Vermunt, L; Vernet, R; Vertesi, R; Vickovic, L; Viinikainen, J; Vilakazi, Z; Baillie,; Villalobos and Villatoro Tello, O.; A,; Vinogradov, A; Virgili, T; Vislavicius, V; Vodopyanov, A; Voelkl, M. A; Voloshin, K; Voloshin, S. A; Volpe, G; von Haller, B; Vorobyev,; I and Voscek,; D,; Vranic, D; Vrlakova, J; Wagner, B; Wang, H; Wang, M; Watanabe, Y; Weber, M; Weber, S. G; Wegrzynek, A; Weiser, D. F; Wenzel, S. C; Wessels, J. P; Westerhoff, U; Whitehead, A. M; Wiechula, J; Wikne, J; Wilk, G; Wilkinson, J; Willems, G. A; Williams, M. C. S; Willsher, E; Windelband, B; Witt, W. E; Xu, R; Yalcin, S; Yamakawa, K; Yano, S; Yin, Z; Yokoyama, H; Yoo,; I-K and Yoon,; J. H.,; Yurchenko,; V and Zaccolo,; V and Zaman,; A,; Zampolli, C; Zanoli, H. J. C; Zardoshti, N; Zarochentsev, A; Zavada, P; Zaviyalov, N; Zbroszczyk, H; Zhalov, M; Zhang, X; Zhang, Y; Zhang, Z; Zhao, C; Zherebchevskii,; V and Zhigareva,; N,; Zhou, D; Zhou, Y; Zhou, Z; Zhu, H; Zhu, J; Zhu, Y; Zichichi, A; Zimmermann, M. B; Zinovjev, G; Zmeskal, J; Zou, S; Collaboration, Alice

doi:10.1016/j.physletb.2018.11.039

The elliptic flow of inclusive and direct photons was measured at mid-rapidity in two centrality classes 0-20\% and 20-40\% in Pb-Pb collisions at root s(NN) = 2.76 TeV by ALICE. Photons were detected with the highly segmented electromagnetic calorimeter PHOS and via conversions in the detector material with the e(broken vertical bar)e pairs reconstructed in the central tracking system. The results of the two methods were combined and the direct-photon elliptic flow was extracted in the transverse momentum range 0.9 < p(T) < 6.2 GeV/c. A comparison to RHIC data shows a similar magnitude of the measured direct-photon elliptic flow. Hydrodynamic and transport model calculations are systematically lower than the data, but are found to be compatible. (C) 2018 The Author. Published by Elsevier B.V.