Brunel University Research Archive (BURA): Indications of suppression of excited Υ states in Pb-Pb collisions at √sNN=2.76 TeV

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Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/6076

Title:	Indications of suppression of excited Υ states in Pb-Pb collisions at √sNN=2.76 TeV
Authors:	Chatrchyan, S Khachatryan, V Sirunyan, AM Tumasyan, A Adam, W Bergauer, T Dragicevic, M Ero, J Fabjan, C Friedl, M Fruhwirth, R Boeriu, O Redaelli, N Sala, S de Fatis, TT Buontempo, S Montoya, CAC Cavallo, N De Cosa, A Vanlaer, P Fabozzi, F Snigirev, A Chasco, M Moser, R Iorio, AOM Lista, L Merola, M Paolucci, P Azzi, P Bacchetta, N Bellan, P Bisello, D Branca, A Reucroft, S Adler, V Mozer, MU Carlin, R Checchia, P Dorigo, T Dosselli, U Fanzago, F Gasparini, F Gasparini, U Gozzelino, A Swain, J Lacaprara, S Lazzizzera, I Mulders, M Cimmino, A Margoni, M Mazzucato, M Meneguzzo, AT Nespolo, M Perrozzi, L Pozzobon, N Trocino, D Ronchese, P Simonetto, F Torassa, E Nesvold, E Tosi, M Costantini, S Vanini, S Zotto, P Zumerle, G Baesso, P Wood, D Berzano, U Ratti, SP Riccardi, C Torre, P Nguyen, M Vitulo, P Viviani, C Grunewald, M Biasini, M Bilei, GM Zhang, J Caponeri, B Fano, L Lariccia, P Lucaroni, A Mantovani, G Orimoto, T Menichelli, M Nappi, A Romeo, F Klein, B Galanti, M Santocchia, A Taroni, S Valdata, M Azzurri, P Bagliesi, G Bernardini, J Orsini, L Boccali, T Broccolo, G Castaldi, R Anastassov, A D'Agnolo, RT Lellouch, J Dell'Orso, R Fiori, F Foa, L Giassi, A Kraan, A Cortezon, EP Ligabue, F Lomtadze, T Kubik, A Martini, L Messineo, A Palla, F Marinov, A Segneri, G Serban, AT Spagnolo, P Tenchini, R Perez, E Tonelli, G Felcini, M Rivero, CM Venturi, A Verdini, PG Barone, L Cavallari, F Del Re, D Mccartin, J Di Marco, E Diemoz, M Franci, D Carvalho, W Odell, N Grassi, M Longo, E Meridiani, P Nourbakhsh, S Organtini, G Pandolfi, F Paramatti, R Ryckbosch, D Rahatlou, S Rovelli, C Ofierzynski, RA Vardanyan, I Petrilli, A Amapane, N Arcidiacono, R Argiro, S Arneodo, M Biino, C Botta, C Cartiglia, N Castello, R Pollack, B Thyssen, F Costa, M Pfeiffer, A Demaria, N Graziano, A Mariotti, C Marone, M Maselli, S Migliore, E Mila, G Pozdnyakov, A Monaco, V Musich, M Tytgat, M Pierini, M Obertino, MM Pastrone, N Pelliccioni, M Potenza, A Romero, A Ruspa, M Schmitt, M Sacchi, R Sola, V Solano, A Staiano, A Pimia, M Vanelderen, L Pereira, AV Belforte, S Cossutti, F Della Ricca, G Stoynev, S Gobbo, B Montanino, D Penzo, A Heo, SG Nam, SK Piparo, D Chang, S Verwilligen, P Chung, J Kim, DH Velasco, M Kim, GN Kim, JE Kong, DJ Park, H Ro, SR Son, DC Polese, G Son, T Kim, Z Walsh, S Won, S Kim, JY Song, S Choi, S Hong, B Jo, M Kim, H Kim, JH Racz, A Kim, TJ Lee, KS Mousa, J Moon, DH Zaganidis, N Park, SK Sim, KS Choi, M Kang, S Kim, H Park, C Reece, W Park, IC Klute, M Antonelli, L Park, S Ryu, G Choi, Y Basegmez, S Choi, YK Goh, J Kim, MS Lee, J Lee, S Antunes, JR Liao, J Seo, H Yu, I Bilinskas, MJ Grigelionis, I Janulis, M Bruno, G Martisiute, D Petrov, P Sabonis, T Castilla-Valdez, H Caebergs, T Rolandi, G De La Cruz-Burelo, E Heredia-de La Cruz, I Lopez-Fernandez, R Villalba, RM Sanchez-Hernandez, A Villasenor-Cendejas, LM Caudron, J Moreno, SC Valencia, FV Berry, D Ibarguen, HAS Andreev, V Da Costa, EM Linares, EC Pineda, AM Reyes-Santos, MA Krofcheck, D Tam, J Butler, PH Doesburg, R Brinkerhoff, A Ceard, L Silverwood, H Ahmad, M Rommerskirchen, T Ahmed, I Asghar, MI Hoorani, HR Khan, WA Khurshid, T Qazi, S Hildreth, M Brona, G Cwiok, M Gil, EC Dominik, W Rovere, M Doroba, K Kalinowski, A Konecki, M Krolikowski, J Frueboes, T Jessop, C Gokieli, R Gorski, M Kazana, M Nawrocki, K De Jeneret, JD Sakulin, H Romanowska-Rybinska, K Szleper, M Wrochna, G Zalewski, P Karmgard, DJ Almeida, N Bargassa, P David, A Faccioli, P Parracho, PGF Gallinaro, M Schafer, C Delaere, C Musella, P Nayak, A Kolb, J Pela, J Ribeiro, PQ Seixas, J Varela, J Afanasiev, S Belotelov, I Bunin, P Schwick, C Golutvin, I Favart, D Kolberg, T Kamenev, A Karjavin, V Kozlov, G Lanev, A Moisenz, P Palichik, V Perelygin, V Shmatov, S Segoni, I Smirnov, V Lee, YJ Lannon, K Volodko, A Giammanco, A Zarubin, A Golovtsov, V Ivanov, Y Kim, V Levchenko, P Murzin, V Oreshkin, V Sharma, A Luo, W Smirnov, I Sulimov, V Uvarov, L Gregoire, G Vavilov, S Vorobyev, A Vorobyev, A Andreev, Y Dermenev, A Gninenko, S Nicolaou, C Siegrist, P Golubev, N Kirsanov, M Krasnikov, N Matveev, V Hollar, J Pashenkov, A Toropin, A Troitsky, S Epshteyn, V Matorras, F Gavrilov, V Simon, M Kaftanov, V Kossov, M Krokhotin, A Lychkovskaya, N Popov, V Lemaitre, V Safronov, G Semenov, S Lynch, S Stolin, V Vlasov, E Militaru, O Sphicas, P Zhokin, A Boos, E Ershov, A Gribushin, A Kodolova, O Korotkikh, V Marinelli, N Martins, CD Spiropulu, M Stoye, M Tropea, P Tsirou, A Vichoudis, P Voutilainen, M Zeuner, WD Bertl, W Azarkin, M Morse, DM Deiters, K Erdmann, W Hammer, J De Souza, SF Gabathuler, K Horisberger, R Ingram, Q Kaestli, HC Konig, S Kotlinski, D Pearson, T Dremin, I Langenegger, U Meier, F Renker, D Rohe, T Mundim, L Sibille, J Starodumov, A Bani, L Bortignon, P Ruchti, R Caminada, L Kirakosyan, M Casal, B Chanon, N Chen, Z Cittolin, S Dissertori, G Nogima, H Dittmar, M Eugster, J Slaunwhite, J Freudenreich, K Grab, C Leonidov, A Hintz, W Lecomte, P Lustermann, W Marchica, C del Arbol, PMR Milenovic, P Oguri, V Li, W Valls, N Moortgat, F Nageli, C Nef, P Rusakov, SV Nessi-Tedaldi, F Pape, L Pauss, F Punz, T Rizzi, A Ronga, FJ Wayne, M Rossini, M Da Silva, WLP Sala, L Sanchez, AK Vinogradov, A Sawley, MC Stieger, B Tauscher, L Thea, A Theofilatos, K Ziegler, J Treille, D Urscheler, C Wallny, R Santoro, A Weber, M Azhgirey, I Wehrli, L Weng, J Aguilo, E Amsler, C Bylsma, B Chiochia, V De Visscher, S Favaro, C Rikova, MI Mejias, BM Do Amaral, SMS Bayshev, I Otiougova, P Robmann, P Schmidt, A Sanchez, FJM Snoek, H Chang, YH Chen, KH Kuo, CM Li, SW Lin, W Liu, ZK Bitioukov, S Sznajder, A Lu, YJ Liko, D Mekterovic, D Volpe, R Wu, JH Yu, SS Bartalini, P Chang, P Chang, YH Chang, YW Grishin, V Chao, Y Ptochos, F Bernardes, CA Chen, KF Hou, WS Hsiung, Y Kao, KY Lei, YJ Lu, RS Shiu, JG Tzeng, YM Nuttens, C Durkin, LS Wang, M Adiguzel, A Dias, FA Bakirci, MN Cerci, S Dozen, C Dumanoglu, I Eskut, E Girgis, S Gokbulut, G Gu, J Kachanov, V Hos, I Kangal, EE Topaksu, AK Hansel, S Tomei, TRFP Onengut, G Ozdemir, K Ozturk, S Polatoz, A Hill, C Sogut, K Konstantinov, D Cerci, DS Tali, B Topakli, H Uzun, D Vergili, LN Gregores, EM Vergili, M Akin, IV Loizides, C Killewald, P Aliev, T Bilin, B Korablev, A Bilmis, S Deniz, M Gamsizkan, H Guler, AM Ocalan, K Ozpineci, A Lagana, C Kotov, K Serin, M Sever, R Surat, UE Krychkine, V Yildirim, E Zeyrek, M Deliomeroglu, M Demir, D Gulmez, E Isildak, B Ling, TY Kaya, M Marinho, F Kaya, O Ozbek, M Petrov, V Ozkorucuklu, S Sonmez, N Levchuk, L Bostock, F Brooke, JJ Rodenburg, M Cheng, TL Clement, E Cussans, D Mercadante, PG Frazier, R Ryutin, R Goldstein, J Grimes, M Hartley, D Heath, GP Williams, G Heath, HF Kreczko, L Metson, S Newbold, DM Nirunpong, K Novaes, SF Sobol, A Poll, A Senkin, S Smith, VJ Gomez, JP Basso, L Belyaev, A Brew, C Brown, RM Camanzi, B Cockerill, DJA Coughlan, JA Tourtchanovitch, L Padula, SS Harder, K Adam, N Harper, S Jackson, J Kennedy, BW Olaiya, E Petyt, D Radburn-Smith, BC Shepherd-Themistocleous, CH Tomalin, IR Troshin, S Womersley, WJ Berry, E Darmenov, N Worm, SD Bainbridge, R Ball, G Ballin, J Beuselinck, R Buchmuller, O Colling, D Cripps, N Tyurin, N Razis, PA Cutajar, M Davies, G Genchev, V Della Negra, M Ferguson, W Fulcher, J Futyan, D Gilbert, A Bryer, AG Hall, G Elmer, P Ovyn, S Hatherell, Z Hays, J Iles, G Iaydjiev, P Jarvis, M Karapostoli, G Lyons, L MacEvoy, BC Magnan, AM Luckey, PD Gerbaudo, D Marrouche, J Uzunian, A Mathias, B Nandi, R Nash, J Nikitenko, A Hoch, M Piperov, S Papageorgiou, A Pesaresi, M Halyo, V Petridis, K Pioppi, M Volkov, A Raymond, DM Rogerson, S Rompotis, N Rose, A Ryan, MJ Seez, C Rodozov, M Hebda, P Sharp, P Sparrow, A Tapper, A Adzic, P Tourneur, S Acosta, MV Virdee, T Wakefield, S Wardle, N Wardrope, D Hunt, A Whyntie, T Stoykova, S Barrett, M Chadwick, M Djordjevic, M Cole, JE Hobson, PR Khan, A Kyberd, P Leslie, D Jones, J Martin, W Reid, ID Teodorescu, L Sultanov, G Hatakeyama, K Krpic, D Liu, H Henderson, C Bose, T Jarrin, EC Laird, E Fantasia, C Heister, A St John, J Lawson, P Lazic, D Tcholakov, V Milosevic, J Rohlf, J Sperka, D Sulak, L Rodrigo, T Avetisyan, A Bhattacharya, S Chou, JP Cutts, D Ferapontov, A Heintz, U Jabeen, S Aguilar-Benitez, M Trayanov, R Kukartsev, G Pegna, DL Landsberg, G Luk, M Narain, M Nguyen, D Segala, M Sinthuprasith, T Speer, T Tsang, KV Maestre, JA Breedon, R Marlow, D Dimitrov, A Breto, G Sanchez, MCD Chauhan, S Chertok, M Conway, J Cox, PT Dolen, J Erbacher, R Arce, P Medvedeva, T Friis, E Ko, W Hadjiiska, R Kopecky, A Lander, R Liu, H Maruyama, S Miceli, T Nikolic, M Pellett, D Ma, T Finger, M Battilana, C Robles, J Salur, S Schwarz, T Karadzhinova, A Searle, M Smith, J Squires, M Tripathi, M Sierra, RV Mooney, M Veelken, C Pagano, D Andreev, V Arisaka, K Cline, D Cousins, R Kozhuharov, V Deisher, A Duris, J Erhan, S Olsen, J Farrell, C Hauser, J Calvo, E Ignatenko, M Jarvis, C Plager, C Rakness, G Schlein, P Hormann, N Litov, L Piroue, P Tucker, J Valuev, V Babb, J Cepeda, M Chandra, A Clare, R Ellison, J Gary, JW Giordano, F Hanson, G Quan, X Jeng, GY Mateev, M Kao, SC Liu, F Cerrada, M Liu, H Long, OR Luthra, A Nguyen, H Shen, BC Safdi, B Stringer, R Sturdy, J Sumowidagdo, S Pavlov, B Wilken, R Llatas, MC Wimpenny, S Andrews, W Branson, JG Cerati, GB Saka, H Evans, D Golf, F Holzner, A Kelley, R Lebourgeois, M Petkov, P Colino, N Letts, J Mangano, B Padhi, S Rodriguez-Marrero, AY Palmer, C Petrucciani, G Pi, H Pieri, M Ranieri, R Sani, M Sharma, V De La Cruz, B Bian, JG Simon, S Stickland, D Sudano, E Tadel, M Tu, Y Vartak, A Wasserbaech, S Wurthwein, F Yagil, A Yoo, J Peris, AD Barge, D Tully, C Chen, GM Bellan, R Campagnari, C D'Alfonso, M Danielson, T Flowers, K Geffert, P Incandela, J Justus, C Pardos, CD Nahn, S Werner, JS Kalavase, P Koay, SA Chen, HS Kovalskyi, D Krutelyov, V Lowette, S Mccoll, N Pavlunin, V Rebassoo, F Ribnik, J Zuranski, A Vazquez, DD Richman, J Rossin, R Stuart, D Jiang, CH To, W Vlimant, JR Apresyan, A Bornheim, A Bunn, J Finger, M Chen, Y Bedoya, CF Gataullin, M Ma, Y Mott, A Newman, HB Liang, D Rogan, C Shin, K Timciuc, V Acosta, JG Traczyk, P Veverka, J Pin, A Wilkinson, R Yang, Y Zhu, RY Akgun, B Carroll, R Liang, S Ferguson, T Huang, XT Iiyama, Y Jang, DW Jun, SY Ramos, JPF Liu, YF Paulini, M Russ, J Vogel, H Vorobiev, I Cumalat, JP Lopez, A Hrubec, J Meng, X Dinardo, ME Drell, BR Ferrando, A Edelmaier, CJ Ford, WT Gaz, A Heyburn, B Lopez, EL Mendez, H Nauenberg, U Smith, JG Stenson, K Tao, J Ulmer, KA Flix, J Wagner, SR Zang, SL Agostino, L Alexander, J Oliveros, S Cassel, D Chatterjee, A Eggert, N Gibbons, LK Heltsley, B Wang, J Fouz, MC Henriksson, K Hopkins, W Khukhunaishvili, A Ruiz-Jimeno, A Kreis, B Kaufman, GN Patterson, JR Puigh, D Ryd, A Saelim, M Salvati, E Garcia-Abia, P Wang, J Shi, X Vargas, JER Sun, W Teo, WD Thom, J Thompson, J Vaughan, J Weng, Y Winstrom, L Wittich, P Lopez, OG Biselli, A Paus, C Zatserklyaniy, A Wang, X Cirino, G Winn, D Abdullin, S Albrow, M Anderson, J Apollinari, G Atac, M Bakken, JA Lopez, SG Alagoz, E Bauerdick, LAT Beretvas, A Wang, Z Berryhill, J Bhat, PC Bloch, I Borcherding, F Burkett, K Butler, JN Chetluru, V Barnes, VE Hernandez, JM Cheung, HWK Chlebana, F Cihangir, S Xiao, H Cooper, W Eartly, DP Elvira, VD Esen, S Fisk, I Bolla, G Freeman, J Josa, MI Gao, Y Gottschalk, E Green, D Gunthoti, K Xu, M Gutsche, O Hanlon, J Harris, RM Assran, Y Hirschauer, J Hooberman, B Merino, G Jensen, H Johnson, M Joshi, U Khatiwada, R Klima, B Zang, J Kousouris, K Borrello, L Kunori, S Kwan, S Leonidopoulos, C Piotrzkowski, K Limon, P Lincoln, D Lipton, R Lykken, J Maeshima, K Marraffino, JM Bortoletto, D Zhang, Z Mason, D McBride, P Miao, T Pelayo, JP Mishra, K Mrenna, S Musienko, Y Newman-Holmes, C O'Dell, V De Mattia, M Pordes, R Prokofyev, O Jeitler, M Ban, Y Saoulidou, N Redondo, I Sexton-Kennedy, E Sharma, S Spalding, WJ Spiegel, L Everett, A Tan, P Taylor, L Tkaczyk, S Uplegger, L Vaandering, EW Guo, S Romero, L Vidal, R Whitmore, J Wu, W Scodellaro, L Yang, F Yumiceva, F Yun, JC Acosta, D Avery, P Bourilkov, D Chen, M Santaolalla, J Guo, Y Das, S Ralph, D Garfinkel, AF De Gruttola, M Di Giovanni, GP Dobur, D Drozdetskiy, A Field, RD Fisher, M Fu, Y Furic, IK Soares, MS Gartner, J Gutay, L Li, W Hugon, J Kim, B Konigsberg, J Korytov, A Kropivnitskaya, A Kypreos, T Low, JF Matchev, K Willmott, C Hu, Z Mitselmakher, G Muniz, L Mao, Y Prescott, C Remington, R Rinkevicius, A Schmitt, M Scurlock, B Sellers, P Skhirtladze, N Jones, M Albajar, C Snowball, M Wang, D Yelton, J Qian, SJ Zakaria, M Gaultney, V Lebolo, LM Linn, S Markowitz, P Koybasi, O Martinez, G Codispoti, G Rodriguez, JL Adams, T Askew, A Bochenek, J Teng, H Chen, J Diamond, B Gleyzer, SV Kress, M Haas, J Hagopian, S de Troconiz, JF Hagopian, V Jenkins, M Johnson, KF Prosper, H Quertenmont, L Zhu, B Sekmen, S Kamel, AE Veeraraghavan, V Baarmand, MM Dorney, B Cuevas, J Guragain, S Hohlmann, M Kalakhety, H Ralich, R Vodopiyanov, I Adams, MR Laasanen, AT Zou, W Anghel, IM Apanasevich, L Bai, Y Schul, N Bazterra, VE Betts, RR Callner, J Cavanaugh, R Dragoiu, C Leonardo, N Gauthier, L Gerber, CE Cabrera, A Hofman, DJ Khalatyan, S Menendez, JF Kunde, GJ Lacroix, F Malek, M O'Brien, C Liu, C Silkworth, C Silvestre, C Smoron, A Strom, D Kiesenhofer, W Moreno, BG Folgueras, S Varelas, N Akgun, U Albayrak, EA Krammer, M Sanudo, MS Bilki, B Clarida, W Duru, F Lae, CK McCliment, E Merlo, JP Mermerkaya, H Caballero, IG Rios, AAO Mestvirishvili, A Maroussov, V Moeller, A Nachtman, J Newsom, CR Norbeck, E Olson, J Onel, Y Ozok, F Sen, S Iglesias, LL Wetzel, J Merkel, P Oliveros, AFO Yetkin, T Yi, K Barnett, BA Blumenfeld, B Bonato, A Eskew, C Fehling, D Giurgiu, G Garcia, JMV Miller, DH Gritsan, AV Guo, ZJ Sanabria, JC Hu, G Maksimovic, P Rappoccio, S Swartz, M Tran, NV Whitbeck, A Baringer, P Neumeister, N Cifuentes, JAB Bean, A Benelli, G Grachov, O Godinovic, N Kenny, RP Murray, M Noonan, D Sanders, S Wood, JS Shipsey, I Zhukova, V Cabrillo, IJ Barfuss, AF Bolton, T Chakaberia, I Ivanov, A Lelas, D Khalil, S Makouski, M Maravin, Y Silvers, D Shrestha, S Svintradze, I Calderon, A Wan, Z Gronberg, J Lange, D Wright, D Baden, A Lelas, K Boutemeur, M Svyatkovskiy, A Eno, SC Ferencek, D Gomez, JA Chuang, SH Hadley, NJ Kellogg, RG Kirn, M Lu, Y Mignerey, AC Rossato, K Khalil, S Plestina, R Rumerio, P Santanastasio, F Skuja, A Campderros, JD Temple, J Tonjes, MB Tonwar, SC Twedt, E Alver, B Yoo, HD Bauer, G Bendavid, J Polic, D Busza, W Butz, E Beliy, N Cali, IA Chan, M Dutta, V Everaerts, P Fernandez, M Zablocki, J Ceballos, GG Goncharov, M Hahn, KA Harris, P Puljak, I Kim, Y Vila, I Zheng, Y Jindal, P Parashar, N Boulahouache, C Ecklund, KM Geurts, FJM Padley, BP Redjimi, R Antunovic, Z Mahmoud, MA Roberts, J Lokhtin, I Cortabitarte, RV Zabel, J Betchart, B Bodek, A Chung, YS Covarelli, R de Barbaro, P Roland, C Demina, R Eshaq, Y Flacher, H Hektor, A Ghete, VM Garcia-Bellido, A Goldenzweig, P Gotra, Y Han, 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Gabella, W Bell, AJ Issah, M Johns, W Kurt, P Maguire, C Melo, A Sheldon, P Snook, B Xie, S Tuo, S Fedi, G Velkovska, J Markina, A Benedetti, D Arenton, MW Balazs, M Boutle, S Cox, B Francis, B Dzelalija, M Goodell, J Hirosky, R Ledovskoy, A Lin, C Czellar, S Bernet, C Neu, C Yohay, R Gollapinni, S Harr, R Yang, M Karchin, PE Lamichhane, P Mattson, M Ne, CM Sakharov, A Anderson, M Bialas, W Harkonen, J Bachtis, M Bellinger, JN Yilmaz, Y Carlsmith, D Dasu, S Efron, J Gray, L Grogg, KS Grothe, M Hall-Wilton, R Alves, GA Herndon, M Heikkinen, A Yoon, AS Herve, A Klabbers, P Klukas, J Lanaro, A Lazaridis, C Leonard, J Loveless, R Mohapatra, A Bloch, P Palmonari, F Zanetti, M Reeder, D Pernicka, M Karimaki, V Ross, I Savin, A Smith, WH Swanson, J Weinberg, M CMS Collaboration Bocci, A Cooper, SI Kinnunen, R Kortelainen, MJ Lampen, T Lassila-Perini, K Lehti, S Linden, T Luukka, P Maenpaa, T Tuominen, E Rahbaran, B Cushman, P Bolognesi, S Tuominiemi, J Tuovinen, E Ungaro, D Wendland, L 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Fabbricatore, P Musenich, R Thomas, L Benaglia, A De Guio, F Di Matteo, L Alda Junior, WL Gennai, S Ghezzi, A Marco, R Malvezzi, S Martelli, A Massironi, A Menasce, D Moroni, L Velde, CV Paganoni, M Pedrini, D Meschi, E Ragazzi, S
Keywords:	Quark-Gluon plasma Heavy Density QCD
Publication Date:	2011
Publisher:	American Physical Society
Citation:	Physical Review Letters 107(5): 052302, Jul 2011
Abstract:	A comparison of the relative yields of Υ resonances in the μ+μ- decay channel in Pb-Pb and pp collisions at a center-of-mass energy per nucleon pair of 2.76 TeV is performed with data collected with the CMS detector at the LHC. Using muons of transverse momentum above 4 GeV/c and pseudorapidity below 2.4, the double ratio of the Υ(2S) and Υ(3S) excited states to the Υ(1S) ground state in Pb-Pb and pp collisions, [Υ(2S+3S)/Υ(1S)]Pb-Pb/[Υ(2S+3S)/Υ(1S)]pp, is found to be 0.31-0.15+0.19(stat)±0.03(syst). The probability to obtain the measured value, or lower, if the true double ratio is unity, is calculated to be less than 1%.
Description:	This is the pre-print version of the Published Article which can be accessed from the link below.
URI:	http://prl.aps.org/abstract/PRL/v107/i5/e052302 http://bura.brunel.ac.uk/handle/2438/6076
DOI:	http://dx.doi.org/10.1103/PhysRevLett.107.052302
ISSN:	0031-9007
Appears in Collections:	School of Engineering and Design Research papers Publications

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