Advanced

Directed Flow of Charged Particles at Midrapidity Relative to the Spectator Plane in Pb-Pb Collisions at sqrt[s_{NN}]=2.76 TeV.

Abelev, B; Adam, J; Adamová, D; Adare, A M; Aggarwal, M M; Aglieri Rinella, G; Agnello, M; Agocs, A G; Agostinelli, A and Ahammed, Z, et al. (2013) In Physical Review Letters 111(23).
Abstract
The directed flow of charged particles at midrapidity is measured in Pb-Pb collisions at sqrt[s_{NN}]=2.76 TeV relative to the collision symmetry plane defined by the spectator nucleons. A negative slope of the rapidity-odd directed flow component with approximately 3 times smaller magnitude than found at the highest RHIC energy is observed. This suggests a smaller longitudinal tilt of the initial system and disfavors the strong fireball rotation predicted for the LHC energies. The rapidity-even directed flow component is measured for the first time with spectators and found to be independent of pseudorapidity with a sign change at transverse momenta p_{T} between 1.2 and 1.7 GeV/c. Combined with the observation of a vanishing... (More)
The directed flow of charged particles at midrapidity is measured in Pb-Pb collisions at sqrt[s_{NN}]=2.76 TeV relative to the collision symmetry plane defined by the spectator nucleons. A negative slope of the rapidity-odd directed flow component with approximately 3 times smaller magnitude than found at the highest RHIC energy is observed. This suggests a smaller longitudinal tilt of the initial system and disfavors the strong fireball rotation predicted for the LHC energies. The rapidity-even directed flow component is measured for the first time with spectators and found to be independent of pseudorapidity with a sign change at transverse momenta p_{T} between 1.2 and 1.7 GeV/c. Combined with the observation of a vanishing rapidity-even p_{T} shift along the spectator deflection this is strong evidence for dipolelike initial density fluctuations in the overlap zone of the nuclei. Similar trends in the rapidity-even directed flow and the estimate from two-particle correlations at midrapidity, which is larger by about a factor of 40, indicate a weak correlation between fluctuating participant and spectator symmetry planes. These observations open new possibilities for investigation of the initial conditions in heavy-ion collisions with spectator nucleons. (Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
111
issue
23
publisher
American Physical Society
external identifiers
  • wos:000328618300006
  • pmid:24476260
  • scopus:84890253898
ISSN
1079-7114
DOI
10.1103/PhysRevLett.111.232302
language
English
LU publication?
yes
id
30395263-b636-4da3-ae1e-dfe78a887257 (old id 4286584)
date added to LUP
2014-02-12 08:35:31
date last changed
2019-04-23 01:22:12
@article{30395263-b636-4da3-ae1e-dfe78a887257,
  abstract     = {The directed flow of charged particles at midrapidity is measured in Pb-Pb collisions at sqrt[s_{NN}]=2.76 TeV relative to the collision symmetry plane defined by the spectator nucleons. A negative slope of the rapidity-odd directed flow component with approximately 3 times smaller magnitude than found at the highest RHIC energy is observed. This suggests a smaller longitudinal tilt of the initial system and disfavors the strong fireball rotation predicted for the LHC energies. The rapidity-even directed flow component is measured for the first time with spectators and found to be independent of pseudorapidity with a sign change at transverse momenta p_{T} between 1.2 and 1.7 GeV/c. Combined with the observation of a vanishing rapidity-even p_{T} shift along the spectator deflection this is strong evidence for dipolelike initial density fluctuations in the overlap zone of the nuclei. Similar trends in the rapidity-even directed flow and the estimate from two-particle correlations at midrapidity, which is larger by about a factor of 40, indicate a weak correlation between fluctuating participant and spectator symmetry planes. These observations open new possibilities for investigation of the initial conditions in heavy-ion collisions with spectator nucleons.},
  articleno    = {232302},
  author       = {Abelev, B and Adam, J and Adamová, D and Adare, A M and Aggarwal, M M and Aglieri Rinella, G and Agnello, M and Agocs, A G and Agostinelli, A and Ahammed, Z and Ahmad, N and Ahmad Masoodi, A and Ahmed, I and Ahn, S A and Ahn, S U and Aimo, I and Ajaz, M and Akindinov, A and Aleksandrov, D and Alessandro, B and Alexandre, D and Alici, A and Alkin, A and Alme, J and Alt, T and Altini, V and Altinpinar, S and Altsybeev, I and Andrei, C and Andronic, A and Anguelov, V and Anielski, J and Anson, C and Antičić, T and Antinori, F and Antonioli, P and Aphecetche, L and Appelshäuser, H and Arbor, N and Arcelli, S and Arend, A and Armesto, N and Arnaldi, R and Aronsson, T and Arsene, I C and Arslandok, M and Asryan, A and Augustinus, A and Averbeck, R and Awes, T C and Aystö, J and Azmi, M D and Bach, M and Badalà, A and Baek, Y W and Bailhache, R and Bala, R and Baldisseri, A and Baltasar Dos Santos Pedrosa, F and Bán, J and Baral, R C and Barbera, R and Barile, F and Barnaföldi, G G and Barnby, L S and Barret, V and Bartke, J and Basile, M and Bastid, N and Basu, S and Bathen, B and Batigne, G and Batyunya, B and Batzing, P C and Baumann, C and Bearden, I G and Beck, H and Behera, N K and Belikov, I and Bellini, F and Bellwied, R and Belmont-Moreno, E and Bencedi, G and Beole, S and Berceanu, I and Bercuci, A and Berdnikov, Y and Berenyi, D and Bergognon, A A E and Bertens, R A and Berzano, D and Betev, L and Bhasin, A and Bhati, A K and Bhom, J and Bianchi, L and Bianchi, N and Bianchin, C and Bielčík, J and Bielčíková, J and Bilandzic, A and Bjelogrlic, S and Blanco, F and Blanco, F and Blau, D and Blume, C and Boccioli, M and Bock, F and Böttger, S and Bogdanov, A and Bøggild, H and Bogolyubsky, M and Boldizsár, L and Bombara, M and Book, J and Borel, H and Borissov, A and Bossú, F and Botje, M and Botta, E and Braidot, E and Braun-Munzinger, P and Bregant, M and Breitner, T and Broker, T A and Browning, T A and Broz, M and Brun, R and Bruna, E and Bruno, G E and Budnikov, D and Buesching, H and Bufalino, S and Buncic, P and Busch, O and Buthelezi, Z and Caffarri, D and Cai, X and Caines, H and Caliva, A and Calvo Villar, E and Camerini, P and Canoa Roman, V and Cara Romeo, G and Carena, F and Carena, W and Carlin Filho, N and Carminati, F and Casanova Díaz, A and Castillo Castellanos, J and Castillo Hernandez, J F and Casula, E A R and Catanescu, V and Cavicchioli, C and Ceballos Sanchez, C and Cepila, J and Cerello, P and Chang, B and Chapeland, S and Charvet, J L and Chattopadhyay, S and Chattopadhyay, S and Cherney, M and Cheshkov, C and Cheynis, B and Chibante Barroso, V and Chinellato, D D and Chochula, P and Chojnacki, M and Choudhury, S and Christakoglou, P and Christensen, C H and Christiansen, Peter and Chujo, T and Chung, S U and Cicalo, C and Cifarelli, L and Cindolo, F and Cleymans, J and Colamaria, F and Colella, D and Collu, A and Conesa Balbastre, G and Conesa Del Valle, Z and Connors, M E and Contin, G and Contreras, J G and Cormier, T M and Corrales Morales, Y and Cortese, P and Cortés Maldonado, I and Cosentino, M R and Costa, F and Cotallo, M E and Crescio, E and Crochet, P and Cruz Alaniz, E and Cruz Albino, R and Cuautle, E and Cunqueiro, L and Czopowicz, T R and Dainese, A and Dang, R and Danu, A and Das, D and Das, I and Das, S and Das, K and Dash, A and Dash, S and De, S and de Barros, G O V and De Caro, A and de Cataldo, G and de Cuveland, J and De Falco, A and De Gruttola, D and Delagrange, H and Deloff, A and De Marco, N and Dénes, E and De Pasquale, S and Deppman, A and D'Erasmo, G and de Rooij, R and Diaz Corchero, M A and Di Bari, D and Dietel, T and Di Giglio, C and Di Liberto, S and Di Mauro, A and Di Nezza, P and Divià, R and Djuvsland, O and Dobrin, Alexandru and Dobrowolski, T and Dönigus, B and Dordic, O and Dubey, A K and Dubla, A and Ducroux, L and Dupieux, P and Dutta Majumdar, A K and Elia, D and Elwood, B G and Emschermann, D and Engel, H and Erazmus, B and Erdal, H A and Eschweiler, D and Espagnon, B and Estienne, M and Esumi, S and Evans, D and Evdokimov, S and Eyyubova, G and Fabris, D and Faivre, J and Falchieri, D and Fantoni, A and Fasel, M and Fehlker, D and Feldkamp, L and Felea, D and Feliciello, A and Fenton-Olsen, B and Feofilov, G and Fernández Téllez, A and Ferretti, A and Festanti, A and Figiel, J and Figueredo, M A S and Filchagin, S and Finogeev, D and Fionda, F M and Fiore, E M and Floratos, E and Floris, M and Foertsch, S and Foka, P and Fokin, S and Fragiacomo, E and Francescon, A and Frankenfeld, U and Fuchs, U and Furget, C and Fusco Girard, M and Gaardhøje, J J and Gagliardi, M and Gago, A and Gallio, M and Gangadharan, D R and Ganoti, P and Garabatos, C and Garcia-Solis, E and Gargiulo, C and Garishvili, I and Gerhard, J and Germain, M and Gheata, A and Gheata, M and Ghidini, B and Ghosh, P and Gianotti, P and Giubellino, P and Gladysz-Dziadus, E and Glässel, P and Goerlich, L and Gomez, R and Ferreiro, E G and González-Zamora, P and Gorbunov, S and Goswami, A and Gotovac, S and Graczykowski, L K and Grajcarek, R and Grelli, A and Grigoras, A and Grigoras, C and Grigoriev, V and Grigoryan, A and Grigoryan, S and Grinyov, B and Grion, N and Gros, Philippe and Grosse-Oetringhaus, J F and Grossiord, J-Y and Grosso, R and Guber, F and Guernane, R and Guerzoni, B and Guilbaud, M and Gulbrandsen, K and Gulkanyan, H and Gunji, T and Gupta, A and Gupta, R and Haake, R and Haaland, O and Hadjidakis, C and Haiduc, M and Hamagaki, H and Hamar, G and Han, B H and Hanratty, L D and Hansen, A and Harris, J W and Harton, A and Hatzifotiadou, D and Hayashi, S and Hayrapetyan, A and Heckel, S T and Heide, M and Helstrup, H and Herghelegiu, A and Herrera Corral, G and Herrmann, N and Hess, B A and Hetland, K F and Hicks, B and Hippolyte, B and Hori, Y and Hristov, P and Hřivnáčová, I and Huang, M and Humanic, T J and Hwang, D S and Ichou, R and Ilkaev, R and Ilkiv, I and Inaba, M and Incani, E and Innocenti, P G and Innocenti, G M and Ionita, C and Ippolitov, M and Irfan, M and Ivanov, V and Ivanov, M and Ivanov, A and Ivanytskyi, O and Jachołkowski, A and Jacobs, P M and Jahnke, C and Jang, H J and Janik, M A and Jayarathna, P H S Y and Jena, S and Jha, D M and Jimenez Bustamante, R T and Jones, P G and Jung, H and Jusko, A and Kaidalov, A B and Kalcher, S and Kaliňák, P and Kalliokoski, T and Kalweit, A and Kang, J H and Kaplin, V and Kar, S and Karasu Uysal, A and Karavichev, O and Karavicheva, T and Karpechev, E and Kazantsev, A and Kebschull, U and Keidel, R and Ketzer, B and Khan, M M and Khan, P and Khan, K H and Khan, S A and Khanzadeev, A and Kharlov, Y and Kileng, B and Kim, J S and Kim, B and Kim, T and Kim, D J and Kim, S and Kim, M and Kim, D W and Kim, J H and Kim, M and Kirsch, S and Kisel, I and Kiselev, S and Kisiel, A and Kiss, G and Klay, J L and Klein, J and Klein-Bösing, C and Kliemant, M and Kluge, A and Knichel, M L and Knospe, A G and Köhler, M K and Kollegger, T and Kolojvari, A and Kompaniets, M and Kondratiev, V and Kondratyeva, N and Konevskikh, A and Kovalenko, V and Kowalski, M and Kox, S and Koyithatta Meethaleveedu, G and Kral, J and Králik, I and Kramer, F and Kravčáková, A and Krelina, M and Kretz, M and Krivda, M and Krizek, F and Krus, M and Kryshen, E and Krzewicki, M and Kucera, V and Kucheriaev, Y and Kugathasan, T and Kuhn, C and Kuijer, P G and Kulakov, I and Kumar, J and Kurashvili, P and Kurepin, A and Kurepin, A B and Kuryakin, A and Kushpil, S and Kushpil, V and Kvaerno, H and Kweon, M J and Kwon, Y and Ladrón de Guevara, P and Lagana Fernandes, C and Lakomov, I and Langoy, R and La Pointe, S L and Lara, C and Lardeux, A and La Rocca, P and Lea, R and Lechman, M and Lee, G R and Lee, S C and Legrand, I and Lehnert, J and Lemmon, R C and Lenhardt, M and Lenti, V and León, H and Leoncino, M and León Monzón, I and Lévai, P and Li, S and Lien, J and Lietava, R and Lindal, S and Lindenstruth, V and Lippmann, C and Lisa, M A and Ljunggren, Martin and Lodato, D F and Loenne, P I and Loggins, V R and Loginov, V and Lohner, D and Loizides, C and Loo, K K and Lopez, X and López Torres, E and Løvhøiden, G and Lu, X-G and Luettig, P and Lunardon, M and Luo, J and Luparello, G and Luzzi, C and Ma, R and Ma, K and Madagodahettige-Don, D M and Maevskaya, A and Mager, M and Mahapatra, D P and Maire, A and Malaev, M and Maldonado Cervantes, I and Malinina, L and Mal'kevich, D and Malzacher, P and Mamonov, A and Manceau, L and Mangotra, L and Manko, V and Manso, F and Manzari, V and Marchisone, M and Mareš, J and Margagliotti, G V and Margotti, A and Marín, A and Markert, C and Marquard, M and Martashvili, I and Martin, N A and Martin Blanco, J and Martinengo, P and Martínez, M I and Martínez García, G and Martynov, Y and Mas, A and Masciocchi, S and Masera, M and Masoni, A and Massacrier, L and Mastroserio, A and Matyja, A and Mayer, C and Mazer, J and Mazumder, R and Mazzoni, M A and Meddi, F and Menchaca-Rocha, A and Mercado Pérez, J and Meres, M and Miake, Y and Mikhaylov, K and Milano, L and Milosevic, J and Mischke, A and Mishra, A N and Miśkowiec, D and Mitu, C and Mlynarz, J and Mohanty, B and Molnar, L and Montaño Zetina, L and Monteno, M and Montes, E and Moon, T and Morando, M and Moreira De Godoy, D A and Moretto, S and Morreale, A and Morsch, A and Muccifora, V and Mudnic, E and Muhuri, S and Mukherjee, M and Müller, H and Munhoz, M G and Murray, S and Musa, L and Musinsky, J and Nandi, B K and Nania, R and Nappi, E and Nasar, M and Nattrass, C and Nayak, T K and Nazarenko, S and Nedosekin, A and Nicassio, M and Niculescu, M and Nielsen, B S and Nikolaev, S and Nikolic, V and Nikulin, V and Nikulin, S and Nilsen, B S and Nilsson, M S and Noferini, F and Nomokonov, P and Nooren, G and Nyanin, A and Nyatha, A and Nygaard, C and Nystrand, J and Ochirov, A and Oeschler, H and Oh, S K and Oh, S and Olah, L and Oleniacz, J and Oliveira Da Silva, A C and Onderwaater, J and Oppedisano, C and Ortiz Velasquez, Antonio and Oskarsson, Anders and Ostrowski, P and Otwinowski, J and Oyama, K and Ozawa, K and Pachmayer, Y and Pachr, M and Padilla, F and Pagano, P and Paić, G and Painke, F and Pajares, C and Pal, S K and Palaha, A and Palmeri, A and Papikyan, V and Pappalardo, G S and Park, W J and Passfeld, A and Patalakha, D I and Paticchio, V and Paul, B and Pavlinov, A and Pawlak, T and Peitzmann, T and Pereira Da Costa, H and Pereira De Oliveira Filho, E and Peresunko, D and Pérez Lara, C E and Perrino, D and Peryt, W and Pesci, A and Pestov, Y and Petráček, V and Petran, M and Petris, M and Petrov, P and Petrovici, M and Petta, C and Piano, S and Pikna, M and Pillot, P and Pinazza, O and Pinsky, L and Pitz, N and Piyarathna, D B and Planinic, M and Płoskoń, M and Pluta, J and Pocheptsov, T and Pochybova, S and Podesta-Lerma, P L M and Poghosyan, M G and Polák, K and Polichtchouk, B and Poljak, N and Pop, A and Porteboeuf-Houssais, S and Pospíšil, V and Potukuchi, B and Prasad, S K and Preghenella, R and Prino, F and Pruneau, C A and Pshenichnov, I and Puddu, G and Punin, V and Putschke, J and Qvigstad, H and Rachevski, A and Rademakers, A and Rak, J and Rakotozafindrabe, A and Ramello, L and Raniwala, S and Raniwala, R and Räsänen, S S and Rascanu, B T and Rathee, D and Rauch, W and Rauf, A W and Razazi, V and Read, K F and Real, J S and Redlich, K and Reed, R J and Rehman, A and Reichelt, P and Reicher, M and Reidt, F and Renfordt, R and Reolon, A R and Reshetin, A and Rettig, F and Revol, J-P and Reygers, K and Riccati, L and Ricci, R A and Richert, Tuva and Richter, M and Riedler, P and Riegler, W and Riggi, F and Rivetti, A and Rodríguez Cahuantzi, M and Rodriguez Manso, A and Røed, K and Rogochaya, E and Rohr, D and Röhrich, D and Romita, R and Ronchetti, F and Rosnet, P and Rossegger, S and Rossi, A and Roy, P and Roy, C and Rubio Montero, A J and Rui, R and Russo, R and Ryabinkin, E and Rybicki, A and Sadovsky, S and Safařík, K and Sahoo, R and Sahu, P K and Saini, J and Sakaguchi, H and Sakai, S and Sakata, D and Salgado, C A and Salzwedel, J and Sambyal, S and Samsonov, V and Sanchez Castro, X and Sándor, L and Sandoval, A and Sano, M and Santagati, G and Santoro, R and Sarkar, D and Scapparone, E and Scarlassara, F and Scharenberg, R P and Schiaua, C and Schicker, R and Schmidt, C and Schmidt, H R and Schuchmann, S and Schukraft, J and Schulc, M and Schuster, T and Schutz, Y and Schwarz, K and Schweda, K and Scioli, G and Scomparin, E and Scott, P A and Scott, R and Segato, G and Selyuzhenkov, I and Senyukov, S and Seo, J and Serci, S and Serradilla, E and Sevcenco, A and Shabetai, A and Shabratova, G and Shahoyan, R and Sharma, N and Sharma, S and Rohni, S and Shigaki, K and Shtejer, K and Sibiriak, Y and Siddhanta, S and Siemiarczuk, T and Silvermyr, D and Silvestre, C and Simatovic, G and Simonetti, G and Singaraju, R and Singh, R and Singha, S and Singhal, V and Sinha, T and Sinha, B C and Sitar, B and Sitta, M and Skaali, T B and Skjerdal, K and Smakal, R and Smirnov, N and Snellings, R J M and Sogaard, Carsten and Soltz, R and Song, J and Song, M and Soos, C and Soramel, F and Spacek, M and Sputowska, I and Spyropoulou-Stassinaki, M and Srivastava, B K and Stachel, J and Stan, I and Stefanek, G and Steinpreis, M and Stenlund, Evert and Steyn, G and Stiller, J H and Stocco, D and Stolpovskiy, M and Strmen, P and Suaide, A A P and Subieta Vásquez, M A and Sugitate, T and Suire, C and Suleymanov, M and Sultanov, R and Sumbera, M and Susa, T and Symons, T J M and Szanto de Toledo, A and Szarka, I and Szczepankiewicz, A and Szymański, M and Takahashi, J and Tangaro, M A and Tapia Takaki, J D and Tarantola Peloni, A and Tarazona Martinez, A and Tauro, A and Tejeda Muñoz, G and Telesca, A and Ter Minasyan, A and Terrevoli, C and Thäder, J and Thomas, D and Tieulent, R and Timmins, A R and Tlusty, D and Toia, A and Torii, H and Toscano, L and Trubnikov, V and Truesdale, D and Trzaska, W H and Tsuji, T and Tumkin, A and Turrisi, R and Tveter, T S and Ulery, J and Ullaland, K and Ulrich, J and Uras, A and Urciuoli, G M and Usai, G L and Vajzer, M and Vala, M and Valencia Palomo, L and Vallero, S and Vande Vyvre, P and Van Hoorne, J W and van Leeuwen, M and Vannucci, L and Vargas, A and Varma, R and Vasileiou, M and Vasiliev, A and Vechernin, V and Veldhoen, M and Venaruzzo, M and Vercellin, E and Vergara, S and Vernet, R and Verweij, M and Vickovic, L and Viesti, G and Viinikainen, J and Vilakazi, Z and Villalobos Baillie, O and Vinogradov, Y and Vinogradov, A and Vinogradov, L and Virgili, T and Viyogi, Y P and Vodopyanov, A and Völkl, M A and Voloshin, K and Voloshin, S and Volpe, G and von Haller, B and Vorobyev, I and Vranic, D and Vrláková, J and Vulpescu, B and Vyushin, A and Wagner, B and Wagner, V and Wagner, J and Wang, Y and Wang, M and Wang, Y and Watanabe, D and Watanabe, K and Weber, M and Wessels, J P and Westerhoff, U and Wiechula, J and Wielanek, D and Wikne, J and Wilde, M and Wilk, G and Wilkinson, J and Williams, M C S and Winn, M and Windelband, B and Xiang, C and Yaldo, C G and Yamaguchi, Y and Yang, H and Yang, S and Yang, P and Yano, S and Yasnopolskiy, S and Yi, J and Yin, Z and Yoo, I-K and Yoon, J and Yushmanov, I and Zaccolo, V and Zach, C and Zampolli, C and Zaporozhets, S and Zarochentsev, A and Závada, P and Zaviyalov, N and Zbroszczyk, H and Zelnicek, P and Zgura, I S and Zhalov, M and Zhang, Y and Zhang, X and Zhang, F and Zhang, H and Zhou, Y and Zhou, F and Zhou, D and Zhu, H and Zhu, X and Zhu, J and Zhu, J and Zichichi, A and Zimmermann, A and Zinovjev, G and Zoccarato, Y and Zynovyev, M and Zyzak, M},
  issn         = {1079-7114},
  language     = {eng},
  number       = {23},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Directed Flow of Charged Particles at Midrapidity Relative to the Spectator Plane in Pb-Pb Collisions at sqrt[s_{NN}]=2.76 TeV.},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.111.232302},
  volume       = {111},
  year         = {2013},
}