Anomalous Evolution of the Near-Side Jet Peak Shape in Pb-Pb Collisions at sqrt[s_{NN}]=2.76 TeV.
J Adam,D Adamová, M M Aggarwal,G Aglieri Rinella,M Agnello, N Agrawal, Z Ahammed,S Ahmad,S U Ahn,S Aiola,A Akindinov,S N Alam, D S D Albuquerque,D Aleksandrov, B Alessandro,D Alexandre, R Alfaro Molina,A Alici,A Alkin, J Alme, T Alt, S Altinpinar, I Altsybeev,C Alves Garcia Prado,M An, C Andrei,H A Andrews, A Andronic, V Anguelov, C Anson, T Antičić, F Antinori, P Antonioli, R Anwar, L Aphecetche,H Appelshäuser, S Arcelli,R Arnaldi,O W Arnold, I C Arsene, M Arslandok, B Audurier, A Augustinus, R Averbeck, M D Azmi, A Badalà,Y W Baek,S Bagnasco, R Bailhache,R Bala,S Balasubramanian, A Baldisseri,R C Baral, A M Barbano, R Barbera, F Barile, G G Barnaföldi, L S Barnby,V Barret,P Bartalini, K Barth, J Bartke,E Bartsch, M Basile, N Bastid,S Basu,B Bathen, G Batigne, A Batista Camejo, B Batyunya, P C Batzing, I G Bearden,H Beck,C Bedda, N K Behera, I Belikov, F Bellini, H Bello Martinez, R Bellwied,L G E Beltran,V Belyaev,G Bencedi, S Beole, A Bercuci,Y Berdnikov,D Berenyi, R A Bertens, D Berzano, L Betev,A Bhasin,I R Bhat, A K Bhati,B Bhattacharjee,J Bhom, L Bianchi, N Bianchi, C Bianchin, J Bielčík, J Bielčíková, A Bilandzic,G Biro,R Biswas,S Biswas, S Bjelogrlic,J T Blair, D Blau, C Blume, F Bock, A Bogdanov, L Boldizsár, M Bombara,M Bonora, J Book, H Borel, A Borissov, M Borri,E Botta, C Bourjau, P Braun-Munzinger, M Bregant,T A Broker,T A Browning, M Broz, E J Brucken, E Bruna, G E Bruno, D Budnikov, H Buesching, S Bufalino,P Buhler,S A I Buitron, P Buncic, O Busch,Z Buthelezi, J B Butt,J T Buxton,J Cabala, D Caffarri, H Caines, A Caliva, E Calvo Villar, P Camerini,F Carena,W Carena,F Carnesecchi, J Castillo Castellanos,A J Castro,E A R Casula, C Ceballos Sanchez, J Cepila,P Cerello, J Cerkala, B Chang, S Chapeland, M Chartier, J L Charvet,S Chattopadhyay,A Chauvin, V Chelnokov,M Cherney, C Cheshkov, B Cheynis,V Chibante Barroso, D D Chinellato,S Cho, P Chochula,K Choi, M Chojnacki, S Choudhury, P Christakoglou, C H Christensen, P Christiansen, T Chujo, S U Chung, C Cicalo, L Cifarelli, F Cindolo, J Cleymans, F Colamaria,D Colella, A Collu,M Colocci,G Conesa Balbastre,Z Conesa Del Valle,M E Connors, J G Contreras, T M Cormier,Y Corrales Morales, I Cortés Maldonado, P Cortese, M R Cosentino,F Costa,J Crkovská, P Crochet,R Cruz Albino, E Cuautle, L Cunqueiro, T Dahms, A Dainese, M C Danisch, A Danu, D Das, I Das,S Das,A Dash, S Dash,S De, A De Caro, G de Cataldo, C de Conti, J de Cuveland, A De Falco, D De Gruttola, N De Marco, S De Pasquale, R D De Souza, A Deisting, A Deloff, C Deplano, P Dhankher, D Di Bari, A Di Mauro, P Di Nezza,B Di Ruzza, M A Diaz Corchero, T Dietel,P Dillenseger, R Divià, Ø Djuvsland, A Dobrin,D Domenicis Gimenez, B Dönigus, O Dordic,T Drozhzhova,A K Dubey, A Dubla, L Ducroux, A K Duggal, P Dupieux, R J Ehlers, D Elia,E Endress, H Engel, E Epple,B Erazmus, F Erhardt, B Espagnon, S Esumi,G Eulisse, J Eum,D Evans,S Evdokimov, G Eyyubova,L Fabbietti, D Fabris, J Faivre, A Fantoni, M Fasel,L Feldkamp, A Feliciello, G Feofilov, J Ferencei, A Fernández Téllez, E G Ferreiro, A Ferretti,A Festanti,V J G Feuillard,J Figiel, M A S Figueredo, S Filchagin, D Finogeev, F M Fionda, E M Fiore, M Floris, S Foertsch, P Foka,S Fokin, E Fragiacomo, A Francescon,A Francisco, U Frankenfeld, G G Fronze, U Fuchs,C Furget,A Furs,M Fusco Girard, J J Gaardhøje, M Gagliardi, A M Gago, K Gajdosova, M Gallio, C D Galvan, D R Gangadharan,P Ganoti,C Gao, C Garabatos,E Garcia-Solis,K Garg,P Garg,C Gargiulo,P Gasik,E F Gauger,M B Gay Ducati, M Germain,P Ghosh,S K Ghosh, P Gianotti, P Giubellino, P Giubilato, E Gladysz-Dziadus, P Glässel,D M Goméz Coral,A Gomez Ramirez,A S Gonzalez,V Gonzalez, P González-Zamora,S Gorbunov, L Görlich, S Gotovac, V Grabski, L K Graczykowski,K L Graham, L Greiner, A Grelli, C Grigoras, V Grigoriev, A Grigoryan,S Grigoryan, N Grion, J M Gronefeld,J F Grosse-Oetringhaus, R Grosso,L Gruber, F Guber, R Guernane, B Guerzoni, K Gulbrandsen,T Gunji,A Gupta, R Gupta,I B Guzman, R Haake, C Hadjidakis,H Hamagaki, G 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Knospe, C Kobdaj, M Kofarago, T Kollegger, A Kolojvari, V Kondratiev, N Kondratyeva,E Kondratyuk, A Konevskikh, M Kopcik, M Kour,C Kouzinopoulos,O Kovalenko,V Kovalenko,M Kowalski, G Koyithatta Meethaleveedu, I Králik, A Kravčáková, M Krivda, F Krizek,E Kryshen, M Krzewicki,A M Kubera,V Kučera,C Kuhn, P G Kuijer,A Kumar,J Kumar,L Kumar,S Kumar,S Kundu, P Kurashvili, A Kurepin,A B Kurepin, A Kuryakin, S Kushpil, M J Kweon, Y Kwon,S L La Pointe, P La Rocca, C Lagana Fernandes,I Lakomov, R Langoy,K Lapidus,C Lara,A Lardeux,A Lattuca, E Laudi,L Lazaridis,R Lea, L Leardini,S Lee, F Lehas, S Lehner, J Lehrbach, R C Lemmon, V Lenti,E Leogrande, I León Monzón,P Lévai,S Li,X Li,J Lien,R Lietava,S Lindal,V Lindenstruth,C Lippmann, M A Lisa, H M Ljunggren,W Llope, D F Lodato, P I Loenne,V Loginov, C Loizides,X Lopez,E López Torres,A Lowe, P Luettig, M Lunardon, G Luparello, M Lupi,T H Lutz, A Maevskaya,M Mager,S Mahajan,S M Mahmood,A Maire,R D Majka,M Malaev, I Maldonado Cervantes, L Malinina, D 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PHYSICAL REVIEW LETTERS（2017）
引用 16|浏览92
摘要
The measurement of two-particle angular correlations is a powerful tool to study jet quenching in a p(T) region inaccessible by direct jet identification. In these measurements pseudorapidity (Delta(eta)) and azimuthal (Delta phi) differences are used to extract the shape of the near-side peak formed by particles associated with a higher p(T) trigger particle (1 < p(T,trig) < 8 GeV/c). A combined fit of the near-side peak and long-range correlations is applied to the data allowing the extraction of the centrality evolution of the peak shape in Pb-Pb collisions at root s(NN) = 2.76 TeV. A significant broadening of the peak in the Delta(eta) direction at low p(T) is found from peripheral to central collisions, which vanishes above 4 GeV/c, while in the Delta(phi) direction the peak is almost independent of centrality. For the 10% most central collisions and 1 < p(T,assoc) < 2 GeV/c, 1 < p(T,trig) < 3 GeV/c a novel feature is observed: a depletion develops around the center of the peak. The results are compared to pp collisions at the same center of mass energy and AMPT model simulations. The comparison to the investigated models suggests that the broadening and the development of the depletion is connected to the strength of radial and longitudinal flow.
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