Title: | Studies of azimuthal dihadron correlations in ultra-central PbPb collisions at √sNN =2.76 TeV |
Authors: | Chatrchyan, S Khachatryan, V Sirunyan, AM Tumasyan, A Adam, W Bergauer, T Dragicevic, M Eroe, J Fabjan, C Friedl, M Fruehwirth, R Zaganidis, N Karjavin, V Konoplyanikov, V Kozlov, G Lanev, A Malakhov, A Matveev, V Moisenz, P Palichik, V Perelygin, V Shmatov, S Basegmez, S Skatchkov, N Smirnov, V Zarubin, A Golovtsov, V Ivanov, Y Kim, V Levchenko, P Murzin, V Oreshkin, V Smirnov, I Beluffi, C Sulimov, V Uvarov, L Vavilov, S Vorobyev, A Vorobyev, A Andreev, Y Dermenev, A Gninenko, S Golubev, N Kirsanov, M Bruno, G Krasnikov, N Pashenkov, A Tlisov, D Toropin, A Epshteyn, V Gavrilov, V Lychkovskaya, N Popov, V Safronov, G Semenov, S Castello, R Spiridonov, A Stolin, V Vlasov, E Zhokin, A Andreev, V Azarkin, M Dremin, I Kirakosyan, M Leonidov, A Mesyats, G Caudron, A Rusakov, SV Vinogradov, A Belyaev, A Boos, E Demiyanov, A Ershov, A Gribushin, A Kodolova, O Korotkikh, V Lokhtin, I Ceard, L Obraztsov, S Petrushanko, S Savrin, V Snigirev, A Vardanyan, I Azhgirey, I Bayshev, I Bitioukov, S Kachanov, V Kalinin, A Da Silveira, GG Konstantinov, D Krychkine, V Petrov, V Ryutin, R Sobol, A Tourtchanovitch, L Troshin, S Tyurin, N Uzunian, A Volkov, A Delaere, C Adzic, P Djordjevic, M Ekmedzic, M Milosevic, J Aguilar-Benitez, M Alcaraz Maestre, J Battilana, C Calvo, E Cerrada, M Chamizo Llatas, M du Pree, T Colino, N De la Cruz, B Delgado Peris, A Dominguez Vazquez, D Fernandez Bedoya, C Fernandez Ramos, JP Ferrando, A Flix, J Fouz, MC Garcia-Abia, P Ghete, VM Favart, D Gonzalez Lopez, O Goy Lopez, S Hernandez, JM Josa, MI Merino, G Navarro De Martino, E Puerta Pelayo, J Quintario Olmeda, A Redondo, I Romero, L Forthomme, L Soares, MS Willmott, C Albajar, C de Troconiz, JF Brun, H Cuevas, J Fernandez Menendez, J Folgueras, S Gonzalez Caballero, I Lloret Iglesias, L Giammanco, A Brochero Cifuentes, JA Cabrillo, IJ Calderon, A Chuang, SH Duarte Campderros, J Fernandez, M Gomez, G Gonzalez Sanchez, J Graziano, A Lopez Virto, A Hollar, J Marco, J Marco, R Martinez Rivero, C Matorras, F Munoz Sanchez, FJ Piedra Gomez, J Rodrigo, T Rodriguez-Marrero, AY Ruiz-Jimeno, A Scodellaro, L Jez, P Vila, I Vilar Cortabitarte, R Abbaneo, D Auffray, E Auzinger, G Bachtis, M Baillon, P Ball, AH Barney, D Bendavid, J Komm, M Benhabib, L Benitez, JF Bernet, C Bianchi, G Bloch, P Bocci, A Bonato, A Bondu, O Botta, C Breuker, H Lemaitre, V Camporesi, T Cerminara, G Christiansen, T Perez, JAC Colafranceschi, S D'Alfonso, M d'Enterria, D Dabrowski, A David, A De Guio, F Liao, J De Roeck, A De Visscher, S Di Guida, S Dobson, M Dupont-Sagorin, N Elliott-Peisert, A Eugster, J Franzoni, G Funk, W Giffels, M Militaru, O Gigi, D Gill, K Girone, M Giunta, M Glege, F Garrido, RG-R Gowdy, S Guida, R Hammer, J Hansen, M Nuttens, C Harris, P Innocente, V Janot, P Karavakis, E Kousouris, K Krajczar, K Lecoq, P Lourenco, C Magini, N Malgeri, L Hartl, C Pagano, D Mannelli, M Masetti, L Meijers, F Mersi, S Meschi, E Moortgat, F Mulders, M Musella, P Orsini, L Cortezon, EP Pin, A Perez, E Perrozzi, L Petrilli, A Petrucciani, G Pfeiffer, A Pierini, M Pimiae, M Piparo, D Plagge, M Racz, A Piotrzkowski, K Reece, W Rolandi, G Rovere, M Sakulin, H Santanastasio, F Schaefer, C Schwick, C Sekmen, S Sharma, A Siegrist, P Popov, A Silva, P Simon, M Sphicas, P Steggemann, J Stieger, B Stoye, M Tsirou, A Veres, GI Vlimant, JR Woehri, HK Quertenmont, L Zeuner, WD Bertl, W Deiters, K Erdmann, W Horisberger, R Ingram, Q Kaestli, HC Koenig, S Kotlinski, D Langenegger, U Selvaggi, M Renker, D Rohe, T Bachmair, F Baeni, L Bianchini, L Bortignon, P Buchmann, MA Casal, B Chanon, N Deisher, A Marono, MV Dissertori, G Dittmar, M Donega, M Duenser, M Eller, P Grab, C Hits, D Lustermann, W Mangano, B Marini, AC Garcia, JMV del Arbol, PMR Meister, D Mohr, N Naegeli, C Nef, P Nessi-Tedaldi, F Pandolfi, F Pape, L Pauss, F Peruzzi, M Beliy, N Quittnat, M Ronga, FJ Rossini, M Starodumov, A Takahashi, M Tauscher, L Theofilatos, K Treille, D Wallny, R Weber, HA Caebergs, T Amsler, C Chiochia, V De Cosa, A Favaro, C Hinzmann, A Hreus, T Rikova, MI Kilminster, B Mejias, BM Ngadiuba, J Hoermann, N Daubie, E Robmann, P Snoek, H Taroni, S Verzetti, M Yang, Y Cardaci, M Chen, KH Ferro, C Kuo, CM Li, SW Hammad, GH Lin, W Lu, YJ Volpe, R Yu, SS Bartalini, P Chang, P Chang, YH Chang, YW Chao, Y Chen, KF Alves, GA Chen, PH Dietz, C Grundler, U Hou, W-S Hsiung, Y Kao, KY Lei, YJ Liu, YF Lu, R-S Majumder, D Correa Martins Junior, M Petrakou, E Shi, X Shiu, JG Tzeng, YM Wang, M Wilken, R Asavapibhop, B Suwonjandee, N Adiguzel, A Bakirci, MN Martins, T Cerci, S Dozen, C Dumanoglu, I Eskut, E Girgis, S Gokbulut, G Gurpinar, E Hos, I Kangal, EE Topaksu, AK Pol, ME Onengut, G Ozdemir, K Ozturk, S Polatoz, A Sogut, K Cerci, DS Tali, B Topakli, H Vergili, M Akin, IV Souza, MHG Aliev, T Bilin, B Bilmis, S Deniz, M Gamsizkan, H Guler, AM Karapinar, G Ocalan, K Ozpineci, A Serin, M Alda Junior, WL Sever, R Surat, UE Yalvac, M Zeyrek, M Guelmez, E Isildak, B Kaya, M Kaya, O Ozkorucuklu, S Bahtiyar, H Carvalho, W Barlas, E Cankocak, K Guenaydin, YO Vardarli, FI Yuecel, M Levchuk, L Sorokin, P Brooke, JJ Clement, E Cussans, D Chinellato, J Flacher, H Frazier, R Goldstein, J Grimes, M Heath, GP Heath, HF Jacob, J Kreczko, L Lucas, C Meng, Z Hrubec, J Custodio, A Newbold, DM Paramesvaran, S Poll, A Senkin, S Smith, VJ Williams, T Belyaev, A Brew, C Brown, RM Cockerill, DJA Da Costa, EM Coughlan, JA Harder, K Harper, S Ilic, J Olaiya, E Petyt, D Shepherd-Themistocleous, CH Thea, A Tomalin, IR Womersley, WJ De Jesus Damiao, D Worm, SD Baber, M Bainbridge, R Buchmuller, O Burton, D Colling, D Cripps, N Cutajar, M Dauncey, P Davies, G De Oliveira Martins, C Della Negra, M Ferguson, W Fulcher, J Futyan, D Gilbert, A Bryer, AG Hall, G Hatherell, Z Hays, J Iles, G Fonseca De Souza, S Jarvis, M Karapostoli, G Kenzie, M Lane, R Lucas, R Lyons, L Magnan, A-M Marrouche, J Mathias, B Nandi, R Malbouisson, H Nash, J Nikitenko, A Pela, J Pesaresi, M Petridis, K Pioppi, M Raymond, DM Rogerson, S Rose, A Seez, C Malek, M Sharp, P Sparrow, A Tapper, A Acosta, MV Virdee, T Wakefield, S Wardle, N Cole, JE Hobson, PR Khan, A Matos Figueiredo, D Kyberd, P Leggat, D Leslie, D Martin, W Reid, ID Symonds, P Teodorescu, L Turner, M Dittmann, J Hatakeyama, K Mundim, L Kasmi, A Liu, H Scarborough, T Charaf, O Cooper, SI Henderson, C Rumerio, P Avetisyan, A Bose, T Fantasia, C Nogima, H Heister, A Lawson, P Lazic, D Rohlf, J Sperka, D St John, J Sulak, L Alimena, J Bhattacharya, S Christopher, G Jeitler, M Prado Da Silva, WL Cutts, D Demiragli, Z Ferapontov, A Garabedian, A Heintz, U Jabeen, S Kukartsev, G Laird, E Landsberg, G Luk, M Santaolalla, J Narain, M Segala, M Sinthuprasith, T Speer, T Swanson, J Breedon, R Breto, G Sanchez, MCDLB Chauhan, S Chertok, M Santoro, A Conway, J Conway, R Cox, PT Erbacher, R Gardner, M Ko, W Kopecky, A Lander, R Miceli, T Pellett, D Sznajder, A Pilot, J Ricci-Tam, F Rutherford, B Searle, M Shalhout, S Smith, J Squires, M Tripathi, M Wilbur, S Yohay, R Tonelli Manganote, EJ Andreev, V Cline, D Cousins, R Erhan, S Everaerts, P Farrell, C Felcini, M Hauser, J Ignatenko, M Jarvis, C Vilela Pereira, A Rakness, G Schlein, P Takasugi, E Valuev, V Weber, M Babb, J Clare, R Ellison, J Gary, JW Hanson, G Bernardes, CA Heilman, J Jandir, P Lacroix, F Liu, H Long, OR Luthra, A Malberti, M Nguyen, H Shrinivas, A Sturdy, J Dias, FA Sumowidagdo, S Wimpenny, S Andrews, W Branson, JG Cerati, GB Cittolin, S D'Agnolo, RT Evans, D Holzner, A Kelley, R Fernandez Perez Tomei, TR Kovalskyi, D Lebourgeois, M Letts, J Macneill, I Padhi, S Palmer, C Pieri, M Sani, M Sharma, V Simon, S Gregores, EM Sudano, E Tadel, M Tu, Y Vartak, A Wasserbaech, S Wuerthwein, F Yagil, A Yoo, J Barge, D Campagnari, C Kiesenhofer, W Lagana, C Danielson, T Flowers, K Geffert, P George, C Golf, F Incandela, J Justus, C Villalba, RM Mccoll, N Pavlunin, V Mercadante, PG Richman, J Rossin, R Stuart, D To, W West, C Apresyan, A Bornheim, A Bunn, J Chen, Y Di Marco, E Novaes, SF Duarte, J Kcira, D Mott, A Newman, HB Pena, C Rogan, C Spiropulu, M Timciuc, V Wilkinson, R Xie, S Padula, SS Zhu, RY Azzolini, V Calamba, A Carroll, R Ferguson, T Iiyama, Y Jang, DW Paulini, M Russ, J Vogel, H Genchev, V Vorobiev, I Cumalat, JP Drell, BR Ford, WT Gaz, A Lopez, EL Nauenberg, U Smith, JG Stenson, K Ulmer, KA Iaydjiev, P Wagner, SR Alexander, J Chatterjee, A Eggert, N Gibbons, LK Hopkins, W Khukhunaishvili, A Kreis, B Mirman, N Kaufman, GN Marinov, A Patterson, JR Ryd, A Salvati, E Sun, W Teo, WD Thom, J Thompson, J Tucker, J Weng, Y Winstrom, L Piperov, S Wittich, P Winn, D Abdullin, S Albrow, M Anderson, J Apollinari, G Bauerdick, LAT Beretvas, A Berryhill, J Bhat, PC Rodozov, M Burkett, K Butler, JN Chetluru, V Cheung, HWK Chlebana, F Cihangir, S Elvira, VD Fisk, I Freeman, J Gao, Y Sultanov, G Gottschalk, E Gray, L Green, D Gruenendahl, S Gutsche, O Hare, D Harris, RM Hirschauer, J Hooberman, B Jindariani, S Knuenz, V Vutova, M Johnson, M Joshi, U Kaadze, K Klima, B Kwan, S Linacre, J Lincoln, D Lipton, R Lykken, J Maeshima, K Dimitrov, A Marraffino, JM Outschoorn, VIM Maruyama, S Mason, D McBride, P Mishra, K Mrenna, S Musienko, Y Nahn, S Newman-Holmes, C Glushkov, I O'Dell, V Prokofyev, O Ratnikova, N Sexton-Kennedy, E Sharma, S Spalding, WJ Spiegel, L Taylor, L Tkaczyk, S Tran, NV Hadjiiska, R Uplegger, L Vaandering, EW Vidal, R Whitbeck, A Whitmore, J Wu, W Yang, F Yun, JC Acosta, D Avery, P Kozhuharov, V Bourilkov, D Cheng, T Das, S De Gruttola, M Di Giovanni, GP Dobur, D Field, RD Fisher, M Fu, Y Furic, IK Litov, L Hugon, J Kim, B Konigsberg, J Korytov, A Kropivnitskaya, A Kypreos, T Low, JF Matchev, K Milenovic, P Mitselmakher, G Pavlov, B Muniz, L Rinkevicius, A Shchutska, L Skhirtladze, N Snowball, M Yelton, J Zakaria, M Gaultney, V Hewamanage, S Linn, S Petkov, P Markowitz, P Martinez, G Rodriguez, JL Adams, T Askew, A Bochenek, J Chen, J Diamond, B Haas, J Hagopian, S Bian, JG Hagopian, V Johnson, KF Prosper, H Veeraraghavan, V Weinberg, M Baarmand, MM Dorney, B Hohlmann, M Kalakhety, H Yumiceva, F Chen, GM Adams, MR Apanasevich, L Bazterra, VE Betts, RR Bucinskaite, I Cavanaugh, R Evdokimov, O Gauthier, L Gerber, CE Hofman, DJ Krammer, M Chen, HS Khalatyan, S Kurt, P Moon, DH O'Brien, C Silkworth, C Turner, P Varelas, N Akgun, U Albayrak, EA Bilki, B Chen, M Clarida, W Dilsiz, K Duru, F Merlo, J-P Mermerkaya, H Mestvirishvili, A Moeller, A Nachtman, J Ogul, H Onel, Y Du, R Ozok, F Sen, S Tan, P Tiras, E Wetzel, J Yetkin, T Yi, K Barnett, BA Blumenfeld, B Bolognesi, S Jiang, CH Fehling, D Gritsan, AV Maksimovic, P Martin, C Swartz, M Baringer, P Bean, A Benelli, G Kenny, RP Murray, M Liang, D Noonan, D Sanders, S Sekaric, J Stringer, R Wang, Q Wood, JS Barfuss, AF Chakaberia, I Ivanov, A Khalil, S Liang, S Makouski, M Maravin, Y Saini, LK Shrestha, S Svintradze, I Gronberg, J Lange, D Rebassoo, F Wright, D Baden, A Meng, X Calvert, B Eno, SC Gomez, JA Hadley, NJ Kellogg, RG Kolberg, T Lu, Y Marionneau, M 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Keywords: | Harmonic flow;Relativistic heavy ion physics;Heavy Ions |
Issue Date: | 2014 |
Citation: | Journal of High Energy Physics, 2014(2): 088, (20 Feb 2014) |
Abstract: | Azimuthal dihadron correlations of charged particles have been measured in PbPb collisions at √ sNN = 2.76TeV by the CMS collaboration, using data from the 2011 LHC heavy-ion run. The data set includes a sample of ultra-central (0-0.2% centrality) PbPb events collected using a trigger based on total transverse energy in the hadron forward calorimeters and the total multiplicity of pixel clusters in the silicon pixel tracker. A total of about 1.8 million ultra-central events were recorded, corresponding to an integrated luminosity of 120 μb − 1. The observed correlations in ultra-central PbPb events are expected to be particularly sensitive to initial-state fluctuations. The single-particle anisotropy Fourier harmonics, from v 2 to v 6, are extracted as a function of particle transverse momentum. At higher transverse momentum, the v 2 harmonic becomes significantly smaller than the higher-order v n (n ≥ 3). The p T-averaged v 2 and v 3 are found to be equal within 2%, while higher-order v n decrease as n increases. The breakdown of factorization of dihadron correlations into single-particle azimuthal anisotropies is observed. This effect is found to be most prominent in the ultra-central PbPb collisions, where the initial-state fluctuations play a dominant role. A comparison of the factorization data to hydrodynamic predictions with event-by-event fluctuating initial conditions is also presented. |
Description: | Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. |
URI: | http://link.springer.com/article/10.1007%2FJHEP02%282014%29088 http://bura.brunel.ac.uk/handle/2438/9336 |
DOI: | http://dx.doi.org/10.1007/JHEP02(2014)088 |
ISSN: | 1029-8479 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers
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