Measurement of charged jet suppression in Pb-Pb collisions at \sqrt{{{s_{\mathrm{NN}}}}} = 2.76 TeV
B I Abelev,J D Adam,D Adamova, M M Aggarwal,G Aglieri Rinella,M Agnello,A G Agocs,A Agostinelli, N Agrawal, Z Ahammed,Nazeer Ahmad,A Ahmad Masoodi,Ijaz Ahmed,S A Ahn,I Aimo,S Aiola,M Ajaz,A Akindinov,D Aleksandrov, B Alessandro,D Alexandre,A Alici,A Alkin, J Alme,T Alt,V Altini,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,N Arbor, 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,Vipul Bairathi,R Bala, A Baldisseri,F Baltasar Dos Santos Pedrosa,J Ban, Rama Chandra Baral,R Barbera,Francesco Barile,Gergely Gabor Barnafoldi, L S Barnby,V Barret, J Bartke,M Basile,N Bastid,Sulagna 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, Gyula Bencedi,S Beole,I Berceanu,A Bercuci,Y Berdnikov,D Berenyi,M Berger, Anais Annick Erica Bergognon, Redmer Alexander Bertens,Dario Berzano, L Betev,Anmol Bhasin, A K Bhati,Buddhadeb Bhattacharjee,Jihyun Bhom,L Bianchi,N Bianchi,C Bianchin, J Bielcik, J Bielcikova,A Bilandzic, S Bjelogrlic,F Blanco, D Blau,C Blume, F Bock, Felix Valentin Boehmer, A G Bogdanov,H Boggild,M Bogolyubsky, L Boldizsar,M Bombara,J Book,H Borel,A Borissov,Joerg Bornschein,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,Oliver Busch,Z Buthelezi,D Caffarri, X Cai,H Caines, Alberto Caliva,E Calvo Villar,P Camerini,V Canoa Roman, F Carena,W Carena,F Carminati,A Casanova Diaz,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,Maia M Cherney,C Cheshkov,B Cheynis,V Chibante Barroso,D D Chinellato, P Chochula,M Chojnacki,Sharmistha Dutta 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,M Colocci,G Conesa Balbastre,Z Conesa Del Valle,M Connors,G Contin,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,Ruina Dang,A Danu,Dwijendra Kumar Das,I Das,Kalyan Kumar Das,S K Das,Ajay Kumar Dash, Swati Dash,S De,H Delagrange,A Deloff,E Denes,G D Erasmo,G O V De Barros,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,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,D Elia,H Engel,B Erazmus,H A Erdal,Dominic Eschweiler,B Espagnon, M Estienne, S Esumi,D L Evans, Sergey Evdokimov,G Eyyubova,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, Sergey Filchagin,D Finogeev,F M Fionda,E M Fiore, E G 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,M Gallio,D R Gangadharan,P Ganoti,C Garabatos, E Garciasolis,Corrado Gargiulo,I Garishvili,J Gerhard,M Germain, A Gheata,M Gheata,B Ghidini,Pradipta Ghosh,S Ghosh, P Gianotti,P Giubellino,E Gladyszdziadus,P Glassel, Ruben Dario Gomez,P Gonzalezzamora,S Gorbunov, L Gorlich,S Gotovac, Lukasz Kamil Graczykowski,R Grajcarek,A Grelli,A Grigoras,Costin Grigoras,V Grigoriev,A 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,T Gunji,Amit Gupta, Rajaneesh Kumar Gupta,K H Khan, Rudiger Haake,Oystein Ariansen Haaland, C Hadjidakis,M Haiduc,H Hamagaki,G Hamar, L D Hanratty,Aage E Hansen, J W Harris,H Hartmann, Austin Vincent Harton,D Hatzifotiadou, Sunao Hayashi,A Hayrapetyan, Stefan Thomas Heckel,Markus Ansgar Heide,H Helstrup,A Herghelegiu,G Herrera Corral,Benjamin Andreas Hess,K F Hetland,B Hicks, B Hippolyte,J Hladky,P Hristov,M Huang, T J Humanic, Donald J Hutter,Dae Sung Hwang, J C Ianigro,R Ilkaev,I Ilkiv,M Inaba,E Incani, Gian Michele Innocenti,C Ionita,M Ippolitov,M Irfan,M Ivanov, V V Ivanov, Oleksii Ivanytskyi,A Jacholkowski, Cristiane Jahnke, H J Jang,M Janik,P H S Y Jayarathna, S K Jena,R T Jimenez Bustamante, P G Jones, H Jung,A Jusko,S Kalcher,Peter Kalinak,Alexander Philipp Kalweit,J Kamin,Jin Hyun Kang,V Kaplin, Sudhakar Kar,A Karasu Uysal,Oleg Karavichev,Tatiana Karavicheva,Evgeny Karpechev,U Kebschull,R Keidel,B Ketzer,M M Khan,P Khan,S A Khan,A Khanzadeev,Y Kharlov,Bjarte Kileng, Bumsoo Kim,D W Kim,Jee Soo Kim,Miyeon Kim,Seonghoon Kim,T Kim,Stefan Kirsch,I Kisel,S Kiselev,A Kisiel,G Kiss,J Klay,J Klein,C Kleinbosing,A Kluge, Michael Linus Knichel,A G Knospe,Chinorat Kobdaj, M K Kohler,T Kollegger,A Kolojvari,V Kondratiev, Natalia Kondratyeva, A Konevskikh, V G Kovalenko,M Kowalski,S Kox,G Koyithatta Meethaleveedu,J F Kral,I Kralik,F Kramer,A Kravcakova, Michal Krelina,M Kretz,M Krivda, F Krizek,M Krus, Evgeny Kryshen,M Krzewicki,Vit Kucera,Y Kucheriaev,Thanushan Kugathasan,C Kuhn,P G Kuijer, Igor Kulakov,Jayant Kumar,Podist Kurashvili,A B Kurepin,A Kuryakin,S Kushpil,V 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, Gary R Lee,Iosif Legrand,J Lehnert, R C Lemmon,M Lenhardt,V Lenti, Emilia Leogrande, Marco Leoncino,I Leon Monzon,Peter Levai,S 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,J Luo,G Luparello,C Luzzi, A M Gago, P Jacobs,Rui Ma,A Maevskaya,Magnus Mager,D P Mahapatra,Antonin Maire,Mikhail Malaev,I Maldonado Cervantes,L Malinina,D Mal Kevich, P Malzacher,Alexander 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, A Masoni,L Massacrier,A Mastroserio,A Matyja,C Mayer, Joel Anthony Mazer,Raja Mazumder,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 Miskowiec,Ciprian Mihai Mitu,J Mlynarz,B Mohanty,L Molnar,L Montano Zetina,E Montes,M Morando,D A Moreira De Godoy,S Moretto, A Morreale,Andreas Morsch, V Muccifora,Eugen Mudnic,Sanjib Muhuri,Maitreyee Mukherjee,H Muller, M G Munhoz, S Murray,L Musa, Jan Musinsky, B K Nandi, R Nania,E Nappi,C Nattrass, T K Nayak,S Nazarenko,A Nedosekin,Maria Nicassio,M Niculescu, B S Nielsen,S Nikolaev, Sergey Nikulin, V V Nikulin,B S Nilsen,F Noferini,P Nomokonov,G Nooren,A S Nyanin,A Nyatha, 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,Yvonne Chiara Pachmayer,M Pachr,P Pagano,G Paic,F Painke,C Pajares, S K Pal,A Palmeri,D Pant,Vardanush Papikyan,G S Pappalardo,Woo Jin Park,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, W Peryt,A Pesci,Y Pestov,V Petracek, M Petran,M Petris,M Petrovici,Catia Petta,S Piano,M Pikna,P Pillot,O Pinazza,L Pinsky, Danthasinghe Piyarathna,M Ploskon,M Planinic,J Pluta,Sona Pochybova,P L M Podestalerma,Martin Poghosyan, Esko Heikki Oskari Pohjoisaho,B Polichtchouk,N Poljak, Amalia Pop, S Porteboeufhoussais, John W Porter,V Pospisil,B V K S Potukuchi,Sushil K Prasad,R Preghenella,F Prino, C Pruneau, I A Pshenichnov,G Puddu,P R Pujahari, Valery Punin, J Putschke,Henrik Qvigstad,A Rachevski,Sibaji 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,K Roed, Elena Rogochaya, S Rohni,D Rohr,D Rohrich,Rosa Romita,F Ronchetti, Lucile Ronflette, P Rosnet,S Rossegger, A M Rossi,A Roy, C Roy,P Roy,A J Rubio Montero,R Rui, Rachel S Russo,Evgeny Ryabinkin, Y F Ryabov,A 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Spacek, 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,M A Subieta Vasquez, T Sugitate, C Suire, Mais Kazim Oglu Suleymanov,Rishat Sultanov, M Sumbera,T Susa,T J M Symons,A Szanto De Toledo,I Szarka,Adam Szczepankiewicz, Maciej Pawel Szymanski, Junichi Takahashi,Marcoantonio Tangaro,J D Tapia Takaki,A Tarantola Peloni,A Tarazona Martinez,A Tauro,G Tejeda Munoz,Adriana Telesca,Cristina Terrevoli, A Ter Minasyan,J Thader,D Thomas,R Tieulent,A R Timmins,A Toia,H Torii,V Trubnikov,W H Trzaska,Tomoya Tsuji,Alexandr Tumkin,R Turrisi,T S Tveter,J Ulery,K Ullaland, Joachim Ulrich,A Uras, G Usai,Michal Vajzer,Martin Vala,L Valencia Palomo,Sara Vallero,P Vande Vyvre,L Vannucci,J W Van Hoorne,M Van Leeuwen,A Vargas,R Varma,Maria Vasileiou,A N Vasiliev,Vladimir Vechernin,M Veldhoen,Massimo Venaruzzo,E Vercellin, S Vergara Limon,R 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Zinovjev,Y Zoccarato,M Zynovyev, M Zyzak
Journal of High Energy Physics(2014)
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摘要
A measurement of the transverse momentum spectra of jets in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV is reported. Jets are reconstructed from charged particles using the anti-$k_{\rm T}$ jet algorithm with jet resolution parameters $R$ of $0.2$ and $0.3$ in pseudo-rapidity $|\eta|<0.5$. The transverse momentum $p_{\rm T}$ of charged particles is measured down to $0.15$ GeV/$c$ which gives access to the low $p_{\rm T}$ fragments of the jet. Jets found in heavy-ion collisions are corrected event-by-event for average background density and on an inclusive basis (via unfolding) for residual background fluctuations and detector effects. A strong suppression of jet production in central events with respect to peripheral events is observed. The suppression is found to be similar to the suppression of charged hadrons, which suggests that substantial energy is radiated at angles larger than the jet resolution parameter $R=0.3$ considered in the analysis. The fragmentation bias introduced by selecting jets with a high $p_{\rm T}$ leading particle, which rejects jets with a soft fragmentation pattern, has a similar effect on the jet yield for central and peripheral events. The ratio of jet spectra with $R=0.2$ and $R=0.3$ is found to be similar in Pb-Pb and simulated PYTHIA pp events, indicating no strong broadening of the radial jet structure in the reconstructed jets with $R<0.3$.
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Jets, Heavy Ions
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