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Measurement of jet radial profiles in Pb–Pb collisions at sNN=2.76 TeV
Authors
S. Acharya Adamová, D. Adhya, S.P. Adler, A. Adolfsson, J. Aggarwal, M.M. Aglieri Rinella, G. Agnello, M. Agrawal, N. Ahammed, Z. Ahmad, S. Ahn, S.U. Aiola, S. Akindinov, A. Al-Turany, M. Alam, S.N. Albuquerque, D.S.D. Aleksandrov, D. Alessandro, B. Alfanda, H.M. Alfaro Molina, R. Ali, B. Ali, Y. Alici, A. Alkin, A. Alme, J. Alt, T. Altenkamper, L. Altsybeev, I. Anaam, M.N. Andrei, C. Andreou, D. Andrews, H.A. Andronic, A. Angeletti, M. Anguelov, V. Anson, C. Antičić, T. Antinori, F. Antonioli, P. Anwar, R. Apadula, N. Aphecetche, L. Appelshäuser, H. Arcelli, S. Arnaldi, R. Arratia, M. Arsene, I.C. Arslandok, M. Augustinus, A. Averbeck, R. Aziz, S. Azmi, M.D. Badalà, A. Baek, Y.W. Bagnasco, S. Bai, X. Bailhache, R. Bala, R. Baldisseri, A. Ball, M. Baral, R.C. Barbera, R. Barioglio, L. Barnaföldi, G.G. Barnby, L.S. Barret, V. Bartalini, P. Barth, K. Bartsch, E. Baruffaldi, F. Bastid, N. Basu, S. Batigne, G. Batyunya, B. Batzing, P.C. Bauri, D. Bazo Alba, J.L. Bearden, I.G. Bedda, C. Behera, N.K. Belikov, I. Bellini, F. Bellwied, R. Belyaev, V. Bencedi, G. Beole, S. Bercuci, A. Berdnikov, Y. Berenyi, D. Bertens, R.A. Berzano, D. Besoiu, M.G. Betev, L. Bhasin, A. Bhat, I.R. Bhatt, H. Bhattacharjee, B. Bianchi, A. Bianchi, L. Bianchi, N. Bielčík, J. Bielčíková, J. Bilandzic, A. Biro, G. Biswas, R. Biswas, S. Blair, J.T. Blau, D. Blume, C. Boca, G. Bock, F. Bogdanov, A. Boldizsár, L. Bolozdynya, A. Bombara, M. Bonomi, G. Borel, H. Borissov, A. Borri, M. Bossi, H. Botta, E. Bourjau, C. Bratrud, L. Braun-Munzinger, P. Bregant, M. Broker, T.A. Broz, M. Brucken, E.J. Bruna, E. Bruno, G.E. Buckland, M.D. Budnikov, D. Buesching, H. Bufalino, S. Bugnon, O. Buhler, P. Buncic, P. Buthelezi, Z. Butt, J.B. Buxton, J.T. Caffarri, D. Caliva, A. Calvo Villar, E. Camacho, R.S. Camerini, P. Capon, A.A. Carnesecchi, F. Castillo Castellanos, J. Castro, A.J. Casula, E.A.R. Catalano, F. Ceballos Sanchez, C. Chakraborty, P. Chandra, S. Chang, B. Chang, W. Chapeland, S. Chartier, M. Chattopadhyay, S. Chauvin, A. Cheshkov, C. Cheynis, B. Chibante Barroso, V. Chinellato, D.D. Cho, S. Chochula, P. Chowdhury, T. Christakoglou, P. Christensen, C.H. Christiansen, P. Chujo, T. Cicalo, C. Cifarelli, L. Cindolo, F. Cleymans, J. Colamaria, F. Colella, D. Collu, A. Colocci, M. Concas, M. Conesa Balbastre, G. Conesa del Valle, Z. Contin, G. Contreras, J.G. Cormier, T.M. Corrales Morales, Y. Cortese, P. Cosentino, M.R. Costa, F. Costanza, S. Crkovská, J. Crochet, P. Cuautle, E. Cunqueiro, L. Dabrowski, D. Dahms, T. Dainese, A. Damas, F.P.A. Dani, S. Danisch, M.C. Danu, A. Das, D. Das, I. Das, S. Dash, A. Dash, S. Dashi, A. De, S. De Caro, A. de Cataldo, G. de Conti, C. de Cuveland, J. De Falco, A. De Gruttola, D. De Marco, N. De Pasquale, S. De Souza, R.D. Deb, S. Degenhardt, H.F. Deja, K.R. Deloff, A. Delsanto, S. Dhankher, P. Di Bari, D. Di Mauro, A. Diaz, R.A. Dietel, T. Dillenseger, P. Ding, Y. Divià, R. Djuvsland, Ø. Dmitrieva, U. Dobrin, A. Dönigus, B. Dordic, O. Dubey, A.K. Dubla, A. Dudi, S. Dukhishyam, M. Dupieux, P. Ehlers, R.J. Elia, D. Engel, H. Epple, E. Erazmus, B. Erhardt, F. Erokhin, A. Ersdal, M.R. Espagnon, B. Eulisse, G. Eum, J. Evans, D. Evdokimov, S. Fabbietti, L. Faggin, M. Faivre, J. Fantoni, A. Fasel, M. Fecchio, P. Feldkamp, L. Feliciello, A. Feofilov, G. Fernández Téllez, A. Ferrero, A. Ferretti, A. Festanti, A. Feuillard, V.J.G. Figiel, J. Filchagin, S. Finogeev, D. Fionda, F.M. Fiorenza, G. Flor, F. Foertsch, S. Foka, P. Fokin, S. Fragiacomo, E. Frankenfeld, U. Fronze, G.G. Fuchs, U. Furget, C. Furs, A. Fusco Girard, M. Gaardhøje, J.J. Gagliardi, M. Gago, A.M. Gal, A. Galvan, C.D. Ganoti, P. Garabatos, C. Garcia-Solis, E. Garg, K. Gargiulo, C. Garner, K. Gasik, P. Gauger, E.F. Gay Ducati, M.B. Germain, M. Ghosh, J. Ghosh, P. Ghosh, S.K. Gianotti, P. Giubellino, P. Giubilato, P. Glässel, P. Goméz Coral, D.M. Gomez Ramirez, A. Gonzalez, V. González-Zamora, P. Gorbunov, S. Görlich, L. Gotovac, S. Grabski, V. Graczykowski, L.K. Graham, K.L. Greiner, L. Grelli, A. Grigoras, C. Grigoriev, V. Grigoryan, A. Grigoryan, S. Groettvik, O.S. Gronefeld, J.M. Grosa, F. Grosse-Oetringhaus, J.F. Grosso, R. Guernane, R. Guerzoni, B. Guittiere, M. Gulbrandsen, K. Gunji, T. Gupta, A. Gupta, R. Guzman, I.B. Haake, R. Habib, M.K. Hadjidakis, C. Hamagaki, H. Hamar, G. Hamid, M. Hannigan, R. Haque, M.R. Harlenderova, A. Harris, J.W. Harton, A. Hasenbichler, J.A. Hassan, H. Hatzifotiadou, D. Hauer, P. Hayashi, S. Heckel, S.T. Hellbär, E. Helstrup, H. Herghelegiu, A. Hernandez, E.G. Herrera Corral, G. Herrmann, F. Hetland, K.F. Hilden, T.E. Hillemanns, H. Hills, C. Hippolyte, B. Hohlweger, B. Horak, D. Hornung, S. Hosokawa, R. Hristov, P. Huang, C. Hughes, C. Huhn, P. Humanic, T.J. Hushnud, H. Husova, L.A. Hussain, N. Hussain, S.A. Hussain, T. Hutter, D. Hwang, D.S. Iddon, J.P. Ilkaev, R. Inaba, M. Ippolitov, M. Islam, M.S. Ivanov, M. Ivanov, V. Izucheev, V. Jacak, B. Jacazio, N. Jacobs, P.M. Jadhav, M.B. Jadlovska, S. Jadlovsky, J. Jaelani, S. Jahnke, C. Jakubowska, M.J. Janik, M.A. Jercic, M. Jevons, O. Jimenez Bustamante, R.T. Jin, M. Jonas, F. Jones, P.G. Jusko, A. Kalinak, P. Kalweit, A. Kang, J.H. Kaplin, V. Kar, S. Karasu Uysal, A. Karavichev, O. Karavicheva, T. Karczmarczyk, P. Karpechev, E. Kebschull, U. Keidel, R. Keil, M. Ketzer, B. Khabanova, Z. Khan, A.M. Khan, S. Khan, S.A. Khanzadeev, A. Kharlov, Y. Khatun, A. Khuntia, A. Kileng, B. Kim, B. Kim, D. Kim, D.J. Kim, E.J. Kim, H. Kim, J. Kim, J.S. Kim, M. Kim, S. Kim, T. Kirsch, S. Kisel, I. Kiselev, S. Kisiel, A. Klay, J.L. Klein, C. Klein, J. Klein, S. Klein-Bösing, C. Klewin, S. Kluge, A. Knichel, M.L. Knospe, A.G. Kobdaj, C. Köhler, M.K. Kollegger, T. Kondratyev, A. Kondratyeva, N. Kondratyuk, E. Konopka, P.J. Koska, L. Kovalenko, O. Kovalenko, V. Kowalski, M. Králik, I. Kravčáková, A. Kreis, L. Krivda, M. Krizek, F. Krizkova Gajdosova, K. Krüger, M. Kryshen, E. Krzewicki, M. Kubera, A.M. Kučera, V. Kuhn, C. Kuijer, P.G. Kumar, L. Kumar, S. Kundu, S. Kurashvili, P. Kurepin, A. Kurepin, A.B. Kushpil, S. Kvapil, J. Kweon, M.J. Kwon, J.Y. Kwon, Y. La Pointe, S.L. La Rocca, P. Lai, Y.S. Langoy, R. Lapidus, K. Lardeux, A. Larionov, P. Laudi, E. Lavicka, R. Lazareva, T. Lea, R. Leardini, L. Lee, S. Lehas, F. Lehner, S. Lehrbach, J. Lemmon, R.C. León Monzón, I. Lesser, E.D. Lettrich, M. Lévai, P. Li, X. Li, X.L. Lien, J. Lietava, R. Lim, B. Lindal, S. Lindenstruth, V. Lindsay, S.W. Lippmann, C. Lisa, M.A. Litichevskyi, V. Liu, A. Liu, S. Llope, W.J. Lofnes, I.M. Loginov, V. Loizides, C. Loncar, P. Lopez, X. López Torres, E. Luettig, P. Luhder, J.R. Lunardon, M. Luparello, G. Lupi, M. Maevskaya, A. Mager, M. Mahmood, S.M. Mahmoud, T. Maire, A. Majka, R.D. Malaev, M. Malik, Q.W. Malinina, L. Mal&apos
Publication date
1 January 2019
Publisher
Abstract
The jet radial structure and particle transverse momentum (pT) composition within jets are presented in centrality-selected Pb–Pb collisions at sNN=2.76 TeV. Track-based jets, which are also called charged jets, were reconstructed with a resolution parameter of R=0.3 at midrapidity |ηch jet|<0.6 for transverse momenta pT,ch jet=30–120 GeV/c. Jet–hadron correlations in relative azimuth and pseudorapidity space (Δφ,Δη) are measured to study the distribution of the associated particles around the jet axis for different pT,assoc-ranges between 1 and 20 GeV/c. The data in Pb–Pb collisions are compared to reference distributions for pp collisions, obtained using embedded PYTHIA simulations. The number of high-pT associate particles (4<pT,assoc<20 GeV/c) in Pb–Pb collisions is found to be suppressed compared to the reference by 30 to 10%, depending on centrality. The radial particle distribution relative to the jet axis shows a moderate modification in Pb–Pb collisions with respect to PYTHIA. High-pT associate particles are slightly more collimated in Pb–Pb collisions compared to the reference, while low-pT associate particles tend to be broadened. The results, which are presented for the first time down to pT,ch jet=30 GeV/c in Pb–Pb collisions, are compatible with both previous jet–hadron-related measurements from the CMS Collaboration and jet shape measurements from the ALICE Collaboration at higher pT, and add further support for the established picture of in-medium parton energy loss. © 2019 The Author(s
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