Neutral pion production at midrapidity in pp and Pb–Pb collisions at √ sNN TeV

B I Abelev,J Adam,D Adamova, M M Aggarwal,M Agnello,A Agostinelli, N Agrawal, Z Ahammed,Nisar Ahmad,Ijaz Ahmed,S A Ahn,I Aimo,S Aiola,M Ajaz,A Akindinov,Sk Noor Alam,D Aleksandrov, B Alessandro,D Alexandre,A Alici,A Alkin, J Alme,T Alt,S Altinpinar,I Altsybeev,C Alves Garcia Prado,C Andrei, A Andronic,V Anguelov, J Anielski,T Anticic,F Antinori,P Antonioli,L Aphecetche,H Appelshauser, S Arcelli,N Armesto,R Arnaldi, T Aronsson,I C Arsene, M Arslandok, A Augustinus, R Averbeck, T C Awes,M D Azmi,M Bach,A Badala,Y W Baek,S Bagnasco,R Bailhache,R Bala, A Baldisseri,F Baltasar Dos Santos Pedrosa,Rama Chandra Baral,R Barbera,Francesco Barile,Gergely Gabor Barnafoldi, L S Barnby,V Barret, J Bartke,M Basile,N Bastid,Subhash Basu,B Bathen,G Batigne,B Batyunya,Paul Christoph Batzing,C Baumann,I G Bearden, H P Beck,Cristina Bedda,Nirbhay Kumar Behera,I Belikov,F Bellini,R Bellwied,E Belmontmoreno,R Belmont,Vladimir Belyaev,Gyula Bencedi,S Beole,I Berceanu,A Bercuci,Y Berdnikov,Daniel Berenyi,M Berger,Redmer Alexander Bertens,Dario Berzano, L Betev, Anmol Bhasin,Inayat Rasool Bhat, A K Bhati,Buddhadeb Bhattacharjee,Jihyun Bhom,Lucia Bianchi,N Bianchi,C Bianchin, J Bielcik, J Bielcikova,A Bilandzic, S Bjelogrlic,Francisco J Blanco,D Blau,C Blume,Friederike Bock, A N Bogdanov,H Boggild,M Bogolyubsky, F V Bohmer, L Boldizsar,M Bombara,J Book,H Borel,A Borissov,F Bossu, M Botje,E Botta,S Bottger, P Braunmunzinger,M Bregant,T Breitner, Theo Alexander Broker, Tyler Allen Browning,Michal Broz,E Bruna,G Bruno,D Budnikov,H Buesching, S Bufalino,P Buncic, O Busch,Z Buthelezi,D Caffarri, Xiuqin Cai,H Caines,L Calero Diaz, Alberto Caliva,E Calvo Villar,P Camerini, F Carena,W Carena,J Castillo Castellanos,Ester Anna Rita Casula,V Catanescu,C Cavicchioli,C Sanchez,Jan Cepila,P Cerello,B Chang,S Chapeland,J L Charvet,S Chattopadhyay, Volodymyr Chelnokov, M Cherney,C Cheshkov,B Cheynis,V Chibante Barroso,D D Chinellato, P Chochula,M Chojnacki, Somnath Choudhury,P Christakoglou,C H Christensen,P Christiansen,T Chujo,S U Chung,C Cicalo, L Cifarelli, F Cindolo, J Cleymans, F Colamaria,Domenico Colella,Alberto Collu, Manuel Colocci,G Conesa Balbastre,Z Conesa Del Valle,M Connors,J G Contreras, T M Cormier,Y Corrales Morales,P Cortese,I Cortes Maldonado,M R Cosentino,Filippo Costa,P Crochet,R Cruz Albino,E Cuautle,L Cunqueiro,A Dainese,Rui Dang,A Danu,D Das,I Das,Kushal Das,S Das,Ajay Kumar Dash,S Dash,Swades De,H Delagrange,A Deloff,E Denes,G D Erasmo,A De Caro,G De Cataldo,J De Cuveland,A De Falco,D De Gruttola,N De Marco,S De Pasquale,R De Rooij,M A Diaz Corchero, T Dietel, Pascal Dillenseger,R Divia,D Di Bari,S Di Liberto,A Di Mauro,P Di Nezza,O Djuvsland,A Dobrin,T Dobrowolski,D Domenicis Gimenez, Benjamin Donigus,O Dordic, S Dorheim,A K Dubey,Andrea Dubla,L Ducroux,P Dupieux,A K Dutta Majumdar,Timo Eero Hilden, Raymond James Ehlers,D Elia,H Engel,B Erazmus,H A Erdal,Dominic Eschweiler,B Espagnon,Michael S Esposito, M Estienne, S Esumi,D J F Evans, Sergey Evdokimov,D Fabris,J Faivre,D Falchieri,A Fantoni,M Fasel,D Fehlker,Linus Feldkamp,D Felea,A Feliciello,G Feofilov, J Ferencei,A Fernandez Tellez,E G Ferreiro, A Ferretti,Andrea Festanti,J Figiel,M A S Figueredo,S Filchagin,D Finogeev,F M Fionda,E M Fiore, Emmanouil Floratos,M Floris,S Foertsch,P Foka,S L Fokin,E Fragiacomo, Andrea Francescon,U Frankenfeld,U Fuchs,C Furget,M Fusco Girard,J J Gaardhoje,M Gagliardi,A Gago,M Gallio,D R Gangadharan,P Ganoti,C Garabatos, E Garciasolis, Corrado Gargiulo,I Garishvili, Jason I Gerhard,M Germain, A Gheata,M Gheata,B Ghidini,P Ghosh, Sudip Ghosh,P Gianotti,P Giubellino,E Gladyszdziadus,P Glassel,A Gomez Ramirez,P Gonzalezzamora,S Gorbunov, L Gorlich,S Gotovac,Lukasz Kamil Graczykowski,A Grelli,A Grigoras,Costin Grigoras,V Grigoriev, Ara Grigoryan,Smbat Grigoryan,B Grinyov,N Grion,Jan Fiete Grosseoetringhaus, J Y Grossiord, R Grosso,F Guber,R Guernane,B Guerzoni,M Guilbaud,K Gulbrandsen,H Gulkanyan, M Gumbo,T Gunji, Ashwani Gupta, R Gupta,K H Khan, Rudiger Haake, I M Haaland, C Hadjidakis,M Haiduc,H Hamagaki,G Hamar, L D Hanratty, A G Hansen, J W Harris, Henrik Hartmann, Austin Vincent Harton,D Hatzifotiadou, Shigenari Hayashi, Stefan Thomas Heckel,Markus Ansgar Heide,H Helstrup,A Herghelegiu,G Herrera Corral,Benjamin Andreas Hess,K F Hetland, B Hippolyte,J Hladky,P Hristov,M Huang, T J Humanic,N Hussain,Dirk Hutter,Dong Soo Hwang,R Ilkaev,I Ilkiv,Masayuki Inaba, Gian Michele Innocenti,Costin Ionita,M Ippolitov,M Irfan,M K Ivanov, V V Ivanov,A Jacholkowski, P Jacobs,Cristiane Jahnke,Haeng Jin Jang,M Janik, P H S Y Jayarathna,C Jena,Satyajit Jena,R T Jimenez Bustamante, P G Jones, Haeyoon Jung,A Jusko, V Kadyshevskiy,S Kalcher,Peter Kalinak,Alexander Philipp Kalweit,J Kamin, J H Kang,V Kaplin, Siddhartha Kar,A Karasu Uysal,Oleg Karavichev,T Karavicheva,Evgeny Karpechev,U Kebschull,R Keidel, D L D Keijdener,M M Khan,P Khan,Shuaib Ahmad Khan,A Khanzadeev,Y Kharlov,Bjarte Kileng,Bohyun Kim,D W Kim,Jin Seok Kim,Mira Kim,Sangyun Kim,Taehun Kim,S Kirsch,I Kisel,S Kiselev,A Kisiel,Gabor Kiss,J Klay,Jacquesolivier Klein,C Kleinbosing,A Kluge,Michael Linus Knichel,A G Knospe,Chinorat Kobdaj,Monika Kofarago, M K Kohler,T Kollegger,A Kolojvari,V Kondratiev, Natalia Kondratyeva, A Konevskikh,V Kovalenko,M Kowalski,S Kox,G Koyithatta Meethaleveedu,J F Kral,I Kralik,Frederick Kramer,A Kravcakova,Michal Krelina,Moritz Kretz,M Krivda, F Krizek,Evgeny Kryshen,M Krzewicki,Vladimir Kucera,Y Kucheriaev,Thanushan Kugathasan,C Kuhn,P G Kuijer, I Kulakov,Jayant Kumar,Podist Kurashvili,A B Kurepin,A Kuryakin,S Kushpil,M J Kweon,Yohan Kwon,P Ladron De Guevara,C Lagana Fernandes,Igor Lakomov,Rune Langoy,C Lara,Antoine Xavier Lardeux, Alessandra Lattuca,S L La Pointe,P La Rocca,R Lea, Lucia Leardini,Graham Richard Lee,Iosif Legrand,J Lehnert,R C Lemmon,V Lenti, Emilia Leogrande, Marco Leoncino,I Leon Monzon,Peter Levai, Shuai Li,J Lien,R Lietava,Svein Lindal,V Lindenstruth,Christian Lippmann, M A Lisa, Hans Martin Ljunggren,Davide Francesco Lodato,P I Loenne,V R Loggins,Vitaly Loginov,D Lohner, C Loizides,X Lopez,E Lopez Torres,X G Lu,P Luettig,M Lunardon,G Luparello,C Luzzi,Rui Ma,A Maevskaya,Magnus Mager,D P Mahapatra, Sohail Musa Mahmood,Antonin Maire,R Majka,Mikhail Malaev,I Maldonado Cervantes,L Malinina,D Mal Kevich,P Malzacher,A Mamonov,L Manceau,V I Manko,F Manso,V Manzari,Massimiliano Marchisone,Jiri Mares,G V Margagliotti, A Margotti,A Marin, C Markert, Marco Marquard,I Martashvili, Nicole Alice Martin,P Martinengo,M Martinez,G Martinez Garcia,J Martin Blanco,Y Martynov,A Mas,S Masciocchi,M Masera,Alberto Masoni,L Massacrier,A Mastroserio,A Matyja,C Mayer, Joel Anthony Mazer,M A Mazzoni,F Meddi,A Menchacarocha,J Mercado Perez, Michal Meres, Y Miake,Konstantin Mikhaylov,Leonardo Milano,Jovan Milosevic, A Mischke,Aditya Nath Mishra,D Miśkowiec, Jayeeta Mitra,Ciprian Mihai Mitu,J Mlynarz, Naghmeh Mohammadi,B Mohanty,L Molnar,L Montano Zetina,E Montes,M Morando,D A Moreira De Godoy,S Moretto,Andreas Morsch, V Muccifora,Eugen Mudnic, Daniel Michael Muhlheim,Sanjib Muhuri,M Mukherjee,H Muller, M G Munhoz,S Murray,L Musa, Jan Musinsky, B K Nandi, R Nania,E Nappi,C Nattrass,K Nayak,T K Nayak,S Nazarenko,A Nedosekin,Maria Nicassio,Mihai Niculescu,B S Nielsen,S Nikolaev,S Nikulin,Vladimir Nikulin,B S Nilsen,F Noferini,P Nomokonov,G Nooren,Jane E Norman,A S Nyanin, J Nystrand,H Oeschler,Sun Kun Oh,Ali Okatan, Laszlo Olah,Janusz Oleniacz,A C Oliveira Da Silva, Jacobus Onderwaater,C Oppedisano,A Ortiz Velasquez,A Oskarsson,J Otwinowski, K I Oyama,Pradeep K Sahoo,Yvonne Chiara Pachmayer,M Pachr,P Pagano,G Paic,F Painke,C Pajares,Sankar K Pal,A Palmeri,D Pant,Vardanush Papikyan,G S Pappalardo,P Pareek,Woo Jin Park,Surendra S Parmar,Annika Passfeld,D I Patalakha,V Paticchio, Biswarup Paul,T Pawlak,T Peitzmann,H Pereira Da Costa,E Pereira De Oliveira Filho,D Peresunko,C E Perez Lara,A Pesci,V Peskov, Yury Pestov,V Petracek, M Petran,M Petris,M Petrovici,Carlos Alberto Petta,S Piano,M Pikna,P Pillot,O Pinazza,L Pinsky,Danthasinghe Piyarathna,M Ploskon,M Planinic, John Pluta,Sona Pochybova,P L M Podestalerma,Martin Poghosyan, Esko Heikki Oskari Pohjoisaho,B Polichtchouk,N Poljak,Adrian Pop, S Porteboeufhoussais, Jeffery A Porter,B V K S Potukuchi,Sanjay K Prasad,R Preghenella,F Prino,C Pruneau,Igor Pshenichnov,G Puddu,P R Pujahari, Valery Punin, J Putschke,Henrik Qvigstad,A Rachevski,Soumyendu Raha,J Rak,A Rakotozafindrabe,L Ramello, R Raniwala,S Raniwala,Sami Sakari Rasanen, Bogdan Theodor Rascanu,Deepika Rathee, A W Rauf, Vahedeh Razazi,K F Read,J S Real,Krzysztof Redlich, Rosi Jan Reed,Attiq Ur Rehman, P Reichelt, M Reicher,Felix Reidt, R Renfordt,A R Reolon,A Reshetin,F Rettig, J P Revol,K Reygers,V Riabov,R A Ricci, T Richert,M Richter,P Riedler,W Riegler,F Riggi,A Rivetti, E Rocco,M Rodriguez Cahuantzi,A Rodriguez Manso,Knut Roed, Elena Rogochaya, S Rohni,D Rohr,D Rohrich,Rosa Romita,F Ronchetti, Lucile Ronflette, P Rosnet, A M Rossi,F Roukoutakis,A Roy, C Roy, P S 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Sogaard,R A Soltz, Jieyoung Song,Meina Song,F Soramel,S P Sorensen, Michal Spacek,E Spiriti, Iwona Anna Sputowska,M Spyropouloustassinaki, B Srivastava, J Stachel,Ionel Stan,G Stefanek, M Steinpreis, E Stenlund,Gideon Francois Steyn,Johannes Hendrik Stiller,D Stocco,M Stolpovskiy,P Strmen,A A P Suaide,T Sugitate, C Suire,Mais Kazim Oglu Suleymanov,Rishat Sultanov,M Sumbera,T Susa,T J M Symons, Alexander Szabo,A Szanto De Toledo,I Szarka,Adam Szczepankiewicz, Maciej Pawel Szymanski,Joseph S Takahashi,Marcoantonio Tangaro,J D Tapia Takaki,A Tarantola Peloni,A Tarazona Martinez, Madalinagabriela Tarzila,A Tauro,G Tejeda Munoz,Adriana Telesca,J Thader, Duncan C Thomas,R Tieulent,A R Timmins,A Toia,V Trubnikov,W H Trzaska,Tomoya Tsuji,Alexandr Tumkin,R Turrisi,T S Tveter,K Ullaland,A Uras,G Usai, Michal Vajzer,Martin Vala,L Valencia Palomo,Sara Vallero,P Vande Vyvre,J Van Der Maarel,J W Van Hoorne,M Van Leeuwen,A Vargas,Marton Vargyas,R Varma,Maria Vasileiou,A N Vasiliev,Vladimir 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Zhu,X Zhu, A Zichichi,Alice Zimmermann, Markus Bernhard Zimmermann,Gennady Zinovjev,Y Zoccarato, M Zyzak

EUROPEAN PHYSICAL JOURNAL C(2014)

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摘要
Invariant yields of neutral pions at midrapidity in the transverse momentum range 0.6 < pT < 12 GeV/c measured in Pb-Pb collisions at root(NN)-N-s = 2.76 TeV are presented for six centrality classes. The pp reference spectrum was measured in the range 0.4 < pT < 10 GeV/c at the same center-of-mass energy. The nuclear modification factor, R-AA, shows a suppression of neutral pions in central Pb-Pb collisions by a factor of up to about 8-10 for 5 less than or similar to p(T) less than or similar to 7 GeV/c. The presented measurements are compared with results at lower center-of-mass energies and with theoretical calculations.
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