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The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high-transverse momentum trigger hadron in p–Pb collisions at t √sNN=5.02 TeV. Jets are reconstructed from charged-particle tracks using the anti-kT algorithm with resolution parameter R=0.2 and 0.4. A data-driven statistical approach is used to correct the uncorrelated background jet yield. Recoil jet distributions are reported for jet transverse momentum 15<50GeV/c and are compared in various intervals of p–Pb event activity, based on charged-particle multiplicity and zero-degree neutral energy in the forward (Pb-going) direction. The semi-inclusive observable is self-normalized and such comparisons do not require the interpretation of p–Pb event activity in terms of collision geometry, in contrast to inclusive jet observables. These measurements provide new constraints on the magnitude of jet quenching in small systems at the LHC. In p–Pb collisions with high event activity, the average medium-induced out-of-cone energy transport for jets with R=0.4 and 15<50GeV/c is measured to be less than 0.4 GeV/c at 90% confidence, which is over an order of magnitude smaller than a similar measurement for central Pb–Pb collisions at t √sNN = 2.76TeV. Comparison is made to theoretical calculations of jet quenching in small systems, and to inclusive jet measurements in p–Pb collisions selected by event activity at the LHC and in d–Au collisions at RHIC.
Acharya, S., Adamová, D., Adolfsson, J., Aggarwal, M., Aglieri Rinella, G., Agnello, M., et al. (2018). Constraints on jet quenching in p–Pb collisions at √sNN = 5.02 TeV measured by the event-activity dependence of semi-inclusive hadron-jet distributions. PHYSICS LETTERS. SECTION B, 783, 95-113 [10.1016/j.physletb.2018.05.059].
Constraints on jet quenching in p–Pb collisions at √sNN = 5.02 TeV measured by the event-activity dependence of semi-inclusive hadron-jet distributions
Acharya, S.;Adamová, D.;Adolfsson, J.;Aggarwal, M. M.;Aglieri Rinella, G.;Agnello, M.;Agrawal, N.;Ahammed, Z.;Ahn, S. U.;Aiola, S.;Akindinov, A.;Al-Turany, M.;Alam, S. N.;Albuquerque, D. S. D.;Aleksandrov, D.;Alessandro, B.;Alfaro Molina, R.;Ali, Y.;Alici, A.;Alkin, A.;Alme, J.;Alt, T.;Altenkamper, L.;Altsybeev, I.;Andrei, C.;Andreou, D.;Andrews, H. A.;Andronic, A.;Angeletti, M.;Anguelov, V.;Anson, C.;Antičić, T.;Antinori, F.;Antonioli, P.;Apadula, N.;Aphecetche, L.;Appelshäuser, H.;Arcelli, S.;Arnaldi, R.;Arnold, O. W.;Arsene, I. C.;Arslandok, M.;Audurier, B.;Augustinus, A.;Averbeck, R.;Azmi, M. D.;Badalà, A.;Baek, Y. W.;Bagnasco, S.;Bailhache, R.;Bala, R.;Baldisseri, A.;Ball, M.;Baral, R. C.;Barbano, A. M.;Barbera, R.;Barile, F.;Barioglio, L.;Barnaföldi, G. G.;Barnby, L. S.;Barret, V.;Bartalini, P.;Barth, K.;Bartsch, E.;Bastid, N.;Basu, S.;Batigne, G.;Batyunya, B.;Batzing, P. C.;Bazo Alba, J. L.;Bearden, I. G.;Beck, H.;Bedda, C.;Behera, N. K.;Belikov, I.;Bellini, F.;Bello Martinez, H.;Bellwied, R.;Beltran, L. G. E.;Belyaev, V.;Bencedi, G.;Beole, S.;Bercuci, A.;Berdnikov, Y.;Berenyi, D.;Bertens, R. A.;Berzano, D.;Betev, L.;Bhaduri, P. P.;Bhasin, A.;Bhat, I. R.;Bhattacharjee, B.;Bhom, J.;Bianchi, A.;Bianchi, L.;Bianchi, N.;Bianchin, C.;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.;Bombara, M.;Bonomi, G.;Bonora, M.;Borel, H.;Borissov, A.;Borri, M.;Botta, E.;Bourjau, C.;Bratrud, L.;Braun-Munzinger, P.;Bregant, M.;Broker, T. A.;Broz, M.;Brucken, E. J.;Bruna, E.;Bruno, G. E.;Budnikov, D.;Buesching, H.;Bufalino, S.;Buhler, P.;Buncic, P.;Busch, O.;Buthelezi, Z.;Butt, J. B.;Buxton, J. T.;Cabala, J.;Caffarri, D.;Caines, H.;Caliva, A.;Calvo Villar, E.;Camacho, R. S.;Camerini, P.;Capon, A. A.;Carena, F.;Carena, W.;Carnesecchi, F.;Castillo Castellanos, J.;Castro, A. J.;Casula, E. A. R.;Ceballos Sanchez, C.;Chandra, S.;Chang, B.;Chang, W.;Chapeland, S.;Chartier, M.;Chattopadhyay, S.;Chattopadhyay, S.;Chauvin, A.;Cheshkov, C.;Cheynis, B.;Chibante Barroso, V.;Chinellato, D. D.;Cho, S.;Chochula, P.;Chojnacki, M.;Choudhury, S.;Chowdhury, T.;Christakoglou, P.;Christensen, C. H.;Christiansen, P.;Chujo, T.;Chung, S. U.;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.;Contreras, J. G.;Cormier, T. M.;Corrales Morales, Y.;Cortés Maldonado, I.;Cortese, P.;Cosentino, M. R.;Costa, F.;Costanza, S.;Crkovská, J.;Crochet, P.;Cuautle, E.;Cunqueiro, L.;Dahms, T.;Dainese, A.;Danisch, M. C.;Danu, A.;Das, D.;Das, I.;Das, S.;Dash, A.;Dash, S.;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.;Degenhardt, H. F.;Deisting, A.;Deloff, A.;Delsanto, S.;Deplano, C.;Dhankher, P.;Di Bari, D.;Di Mauro, A.;Di Nezza, P.;Di Ruzza, B.;Dietel, T.;Dillenseger, P.;Ding, Y.;Divià, R.;Djuvsland, Ø.;Dobrin, A.;Domenicis Gimenez, D.;Dönigus, B.;Dordic, O.;Doremalen, L. V. R.;Dubey, A. K.;Dubla, A.;Ducroux, L.;Dudi, S.;Duggal, A. K.;Dukhishyam, M.;Dupieux, P.;Ehlers, R. J.;Elia, D.;Endress, E.;Engel, H.;Epple, E.;Erazmus, B.;Erhardt, F.;Espagnon, B.;Eulisse, G.;Eum, J.;Evans, D.;Evdokimov, S.;Fabbietti, L.;Faivre, J.;Fantoni, A.;Fasel, M.;Feldkamp, L.;Feliciello, A.;Feofilov, G.;Fernández Téllez, A.;Ferretti, A.;Festanti, A.;Feuillard, V. J. G.;Figiel, J.;Figueredo, M. A. S.;Filchagin, S.;Finogeev, D.;Fionda, F. M.;Floris, M.;Foertsch, S.;Foka, P.;Fokin, S.;Fragiacomo, E.;Francescon, A.;Francisco, A.;Frankenfeld, U.;Fronze, G. G.;Fuchs, U.;Furget, C.;Furs, A.;Fusco Girard, M.;Gaardhøje, J. J.;Gagliardi, M.;Gago, A. M.;Gajdosova, K.;Gallio, M.;Galvan, C. D.;Ganoti, P.;Garabatos, C.;Garcia-Solis, E.;Garg, K.;Gargiulo, C.;Gasik, P.;Gauger, E. F.;Gay Ducati, M. B.;Germain, M.;Ghosh, J.;Ghosh, P.;Ghosh, S. K.;Gianotti, P.;Giubellino, P.;Giubilato, P.;Gladysz-Dziadus, E.;Glässel, P.;Goméz Coral, D. M.;Gomez Ramirez, A.;Gonzalez, A. S.;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.;Gronefeld, J. M.;Grosa, F.;Grosse-Oetringhaus, J. F.;Grosso, R.;Guber, F.;Guernane, R.;Guerzoni, B.;Guittiere, M.;Gulbrandsen, K.;Gunji, T.;Gupta, A.;Gupta, R.;Guzman, I. B.;Haake, R.;Hadjidakis, C.;Hamagaki, H.;Hamar, G.;Hamon, J. C.;Haque, M. R.;Harris, J. W.;Harton, A.;Hassan, H.;Hatzifotiadou, D.;Hayashi, S.;Heckel, S. T.;Hellbär, E.;Helstrup, H.;Herghelegiu, A.;Hernandez, E. G.;Herrera Corral, G.;Herrmann, F.;Hess, B. A.;Hetland, K. F.;Hillemanns, H.;Hills, C.;Hippolyte, B.;Hohlweger, B.;Horak, D.;Hornung, S.;Hosokawa, R.;Hristov, P.;Hughes, C.;Humanic, T. J.;Hussain, N.;Hussain, T.;Hutter, D.;Hwang, D. S.;Iddon, J. P.;Iga Buitron, S. A.;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.;Jayarathna, P. H. S. Y.;Jena, C.;Jercic, M.;Jimenez Bustamante, R. T.;Jones, P. G.;Jusko, A.;Kalinak, P.;Kalweit, A.;Kang, J. H.;Kaplin, V.;Kar, S.;Karasu Uysal, A.;Karavichev, O.;Karavicheva, T.;Karayan, L.;Karczmarczyk, P.;Karpechev, E.;Kebschull, U.;Keidel, R.;Keijdener, D. L. D.;Keil, M.;Ketzer, B.;Khabanova, Z.;Khan, P.;Khan, S.;Khan, S. A.;Khanzadeev, A.;Kharlov, Y.;Khatun, A.;Khuntia, A.;Kielbowicz, M. M.;Kileng, B.;Kim, B.;Kim, D.;Kim, D. J.;Kim, E. J.;Kim, H.;Kim, J. S.;Kim, J.;Kim, M.;Kim, S.;Kim, T.;Kirsch, S.;Kisel, I.;Kiselev, S.;Kisiel, A.;Kiss, G.;Klay, J. L.;Klein, C.;Klein, J.;Klein-Bösing, C.;Klewin, S.;Kluge, A.;Knichel, M. L.;Knospe, A. G.;Kobdaj, C.;Kofarago, M.;Köhler, M. K.;Kollegger, T.;Kondratiev, V.;Kondratyeva, N.;Kondratyuk, E.;Konevskikh, A.;Konyushikhin, M.;Kopcik, M.;Kour, M.;Kouzinopoulos, C.;Kovalenko, O.;Kovalenko, V.;Kowalski, M.;Králik, I.;Kravčáková, A.;Kreis, L.;Krivda, M.;Krizek, F.;Kryshen, E.;Krzewicki, M.;Kubera, A. M.;Kučera, V.;Kuhn, C.;Kuijer, P. G.;Kumar, A.;Kumar, J.;Kumar, L.;Kumar, S.;Kundu, S.;Kurashvili, P.;Kurepin, A.;Kurepin, A. B.;Kuryakin, A.;Kushpil, S.;Kweon, M. J.;Kwon, Y.;La Pointe, S. L.;La Rocca, P.;Lagana Fernandes, C.;Lai, Y. S.;Lakomov, I.;Langoy, R.;Lapidus, K.;Lara, C.;Lardeux, A.;Lattuca, A.;Laudi, E.;Lavicka, R.;Lea, R.;Leardini, L.;Lee, S.;Lehas, F.;Lehner, S.;Lehrbach, J.;Lemmon, R. C.;Leogrande, E.;León Monzón, I.;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.;Llope, W. J.;Lodato, D. F.;Loenne, P. I.;Loginov, V.;Loizides, C.;Loncar, P.;Lopez, X.;López Torres, E.;Lowe, A.;Luettig, P.;Luhder, J. R.;Lunardon, M.;Luparello, G.;Lupi, M.;Lutz, T. H.;Maevskaya, A.;Mager, M.;Mahmood, S. M.;Maire, A.;Majka, R. D.;Malaev, M.;Malinina, L.;Mal'Kevich, D.;Malzacher, P.;Mamonov, A.;Manko, V.;Manso, F.;Manzari, V.;Mao, Y.;Marchisone, M.;Mareš, J.;Margagliotti, G. V.;Margotti, A.;Margutti, J.;Marín, A.;Markert, C.;Marquard, M.;Martin, N. A.;Martinengo, P.;Martinez, J. A. L.;Martínez, M. I.;Martínez García, G.;Martinez Pedreira, M.;Masciocchi, S.;Masera, M.;Masoni, A.;Massacrier, L.;Masson, E.;Mastroserio, A.;Mathis, A. M.;Matuoka, P. F. T.;Matyja, A.;Mayer, C.;Mazer, J.;Mazzilli, M.;Mazzoni, M. A.;Meddi, F.;Melikyan, Y.;Menchaca-Rocha, A.;Meninno, E.;Mercado Pérez, J.;Meres, M.;Mhlanga, S.;Miake, Y.;Mieskolainen, M. M.;Mihaylov, D. L.;Mikhaylov, K.;Mischke, A.;Mishra, A. N.;Miśkowiec, D.;Mitra, J.;Mitu, C. M.;Mohammadi, N.;Mohanty, A. P.;Mohanty, B.;Mohisin Khan, M.;Moreira De Godoy, D. A.;Moreno, L. A. P.;Moretto, S.;Morreale, A.;Morsch, A.;Muccifora, V.;Mudnic, E.;Mühlheim, D.;Muhuri, S.;Mukherjee, M.;Mulligan, J. D.;Munhoz, M. G.;Münning, K.;Munoz, M. I. A.;Munzer, R. H.;Murakami, H.;Murray, S.;Musa, L.;Musinsky, J.;Myers, C. J.;Myrcha, J. W.;Naik, B.;Nair, R.;Nandi, B. K.;Nania, R.;Nappi, E.;Narayan, A.;Naru, M. U.;Natal da Luz, H.;Nattrass, C.;Navarro, S. R.;Nayak, K.;Nayak, R.;Nayak, T. K.;Nazarenko, S.;Negrao De Oliveira, R. A.;Nellen, L.;Nesbo, S. V.;Neskovic, G.;Ng, F.;Nicassio, M.;Niculescu, M.;Niedziela, J.;Nielsen, B. S.;Nikolaev, S.;Nikulin, S.;Nikulin, V.;Nobuhiro, A.;Noferini, F.;Nomokonov, P.;Nooren, G.;Noris, J. C. C.;Norman, J.;Nyanin, A.;Nystrand, J.;Oeschler, H.;Oh, H.;Ohlson, A.;Olah, L.;Oleniacz, J.;Oliveira Da Silva, A. C.;Oliver, M. H.;Onderwaater, J.;Oppedisano, C.;Orava, R.;Oravec, M.;Ortiz Velasquez, A.;Oskarsson, A.;Otwinowski, J.;Oyama, K.;Pachmayer, Y.;Pacik, V.;Pagano, D.;Paić, G.;Palni, P.;Pan, J.;Pandey, A. K.;Panebianco, S.;Papikyan, V.;Pareek, P.;Park, J.;Parmar, S.;Passfeld, A.;Pathak, S. P.;Patra, R. N.;Paul, B.;Pei, H.;Peitzmann, T.;Peng, X.;Pereira, L. G.;Pereira Da Costa, H.;Peresunko, D.;Perez Lezama, E.;Peskov, V.;Pestov, Y.;Petráček, V.;Petrovici, M.;Petta, C.;Pezzi, R. P.;Piano, S.;Pikna, M.;Pillot, P.;Pimentel, L. O. D. L.;Pinazza, O.;Pinsky, L.;Piyarathna, D. B.;Płoskoń, M.;Planinic, M.;Pliquett, F.;Pluta, J.;Pochybova, S.;Podesta-Lerma, P. L. M.;Poghosyan, M. G.;Polichtchouk, B.;Poljak, N.;Poonsawat, W.;Pop, A.;Poppenborg, H.;Porteboeuf-Houssais, S.;Pozdniakov, V.;Prasad, S. K.;Preghenella, R.;Prino, F.;Pruneau, C. A.;Pshenichnov, I.;Puccio, M.;Punin, V.;Putschke, J.;Raha, S.;Rajput, S.;Rak, J.;Rakotozafindrabe, A.;Ramello, L.;Rami, F.;Rana, D. B.;Raniwala, R.;Raniwala, S.;Räsänen, S. S.;Rascanu, B. T.;Rathee, D.;Ratza, V.;Ravasenga, I.;Read, K. F.;Redlich, K.;Rehman, A.;Reichelt, P.;Reidt, F.;Ren, X.;Renfordt, R.;Reshetin, A.;Reygers, K.;Riabov, V.;Richert, T.;Richter, M.;Riedler, P.;Riegler, W.;Riggi, F.;Ristea, C.;Rodríguez Cahuantzi, M.;Røed, K.;Rogalev, R.;Rogochaya, E.;Rohr, D.;Röhrich, D.;Rokita, P. S.;Ronchetti, F.;Rosas, E. D.;Roslon, K.;Rosnet, P.;Rossi, A.;Rotondi, A.;Roukoutakis, F.;Roy, C.;Roy, P.;Rueda, O. V.;Rui, R.;Rumyantsev, B.;Rustamov, A.;Ryabinkin, E.;Ryabov, Y.;Rybicki, A.;Saarinen, S.;Sadhu, S.;Sadovsky, S.;Šafařík, K.;Saha, S. K.;Sahoo, B.;Sahoo, P.;Sahoo, R.;Sahoo, S.;Sahu, P. K.;Saini, J.;Sakai, S.;Saleh, M. A.;Salzwedel, J.;Sambyal, S.;Samsonov, V.;Sandoval, A.;Sarkar, A.;Sarkar, D.;Sarkar, N.;Sarma, P.;Sas, M. H. P.;Scapparone, E.;Scarlassara, F.;Schaefer, B.;Scheid, H. S.;Schiaua, C.;Schicker, R.;Schmidt, C.;Schmidt, H. R.;Schmidt, M. O.;Schmidt, M.;Schmidt, N. V.;Schukraft, J.;Schutz, Y.;Schwarz, K.;Schweda, K.;Scioli, G.;Scomparin, E.;Šefčík, M.;Seger, J. E.;Sekiguchi, Y.;Sekihata, D.;Selyuzhenkov, I.;Senosi, K.;Senyukov, S.;Serradilla, E.;Sett, P.;Sevcenco, A.;Shabanov, A.;Shabetai, A.;Shahoyan, R.;Shaikh, W.;Shangaraev, A.;Sharma, A.;Sharma, A.;Sharma, M.;Sharma, M.;Sharma, N.;Sheikh, A. I.;Shigaki, K.;Shimomura, M.;Shirinkin, S.;Shou, Q.;Shtejer, K.;Sibiriak, Y.;Siddhanta, S.;Sielewicz, K. M.;Siemiarczuk, T.;Silaeva, S.;Silvermyr, D.;Simatovic, G.;Simonetti, G.;Singaraju, R.;Singh, R.;Singhal, V.;Sinha, T.;Sitar, B.;Sitta, M.;Skaali, T. B.;Slupecki, M.;Smirnov, N.;Snellings, R. J. M.;Snellman, T. W.;Song, J.;Soramel, F.;Sorensen, S.;Sozzi, F.;Sputowska, I.;Stachel, J.;Stan, I.;Stankus, P.;Stenlund, E.;Stocco, D.;Storetvedt, M. M.;Strmen, P.;Suaide, A. A. P.;Sugitate, T.;Suire, C.;Suleymanov, M.;Suljic, M.;Sultanov, R.;Šumbera, M.;Sumowidagdo, S.;Suzuki, K.;Swain, S.;Szabo, A.;Szarka, I.;Tabassam, U.;Takahashi, J.;Tambave, G. J.;Tanaka, N.;Tarhini, M.;Tariq, M.;Tarzila, M. G.;Tauro, A.;Tejeda Muñoz, G.;Telesca, A.;Terasaki, K.;Terrevoli, C.;Teyssier, B.;Thakur, D.;Thakur, S.;Thomas, D.;Thoresen, F.;Tieulent, R.;Tikhonov, A.;Timmins, A. R.;Toia, A.;Toppi, M.;Torres, S. R.;Tripathy, S.;Trogolo, S.;Trombetta, G.;Tropp, L.;Trubnikov, V.;Trzaska, W. H.;Trzeciak, B. A.;Tsuji, T.;Tumkin, A.;Turrisi, R.;Tveter, T. S.;Ullaland, K.;Umaka, E. N.;Uras, A.;Usai, G. L.;Utrobicic, A.;Vala, M.;Van Der Maarel, J.;Van Hoorne, J. W.;van Leeuwen, M.;Vanat, T.;Vande Vyvre, P.;Varga, D.;Vargas, A.;Vargyas, M.;Varma, R.;Vasileiou, M.;Vasiliev, A.;Vauthier, A.;Vázquez Doce, O.;Vechernin, V.;Veen, A. M.;Velure, A.;Vercellin, E.;Vergara Limón, S.;Vermunt, L.;Vernet, R.;Vértesi, R.;Vickovic, L.;Viinikainen, J.;Vilakazi, Z.;Villalobos Baillie, O.;Villatoro Tello, A.;Vinogradov, A.;Vinogradov, L.;Virgili, T.;Vislavicius, V.;Vodopyanov, A.;Völkl, M. A.;Voloshin, K.;Voloshin, S. A.;Volpe, G.;von Haller, B.;Vorobyev, I.;Voscek, D.;Vranic, D.;Vrláková, J.;Wagner, B.;Wang, H.;Wang, M.;Watanabe, Y.;Weber, M.;Weber, S. G.;Wegrzynek, A.;Weiser, D. F.;Wenzel, S. C.;Wessels, J. P.;Westerhoff, U.;Whitehead, A. M.;Wiechula, J.;Wikne, J.;Wilk, G.;Wilkinson, J.;Willems, G. A.;Williams, M. C. S.;Willsher, E.;Windelband, B.;Witt, W. E.;Xu, R.;Yalcin, S.;Yamakawa, K.;Yang, P.;Yano, S.;Yin, Z.;Yokoyama, H.;Yoo, I. -K.;Yoon, J. H.;Yun, E.;Yurchenko, V.;Zaccolo, V.;Zaman, A.;Zampolli, C.;Zanoli, H. J. C.;Zardoshti, N.;Zarochentsev, A.;Závada, P.;Zaviyalov, N.;Zbroszczyk, H.;Zhalov, M.;Zhang, H.;Zhang, X.;Zhang, Y.;Zhang, C.;Zhang, Z.;Zhao, C.;Zhigareva, N.;Zhou, D.;Zhou, Y.;Zhou, Z.;Zhu, H.;Zhu, J.;Zhu, Y.;Zichichi, A.;Zimmermann, M. B.;Zinovjev, G.;Zmeskal, J.;Zou, S.
2018
Abstract
The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high-transverse momentum trigger hadron in p–Pb collisions at t √sNN=5.02 TeV. Jets are reconstructed from charged-particle tracks using the anti-kT algorithm with resolution parameter R=0.2 and 0.4. A data-driven statistical approach is used to correct the uncorrelated background jet yield. Recoil jet distributions are reported for jet transverse momentum 15<50GeV/c and are compared in various intervals of p–Pb event activity, based on charged-particle multiplicity and zero-degree neutral energy in the forward (Pb-going) direction. The semi-inclusive observable is self-normalized and such comparisons do not require the interpretation of p–Pb event activity in terms of collision geometry, in contrast to inclusive jet observables. These measurements provide new constraints on the magnitude of jet quenching in small systems at the LHC. In p–Pb collisions with high event activity, the average medium-induced out-of-cone energy transport for jets with R=0.4 and 15<50GeV/c is measured to be less than 0.4 GeV/c at 90% confidence, which is over an order of magnitude smaller than a similar measurement for central Pb–Pb collisions at t √sNN = 2.76TeV. Comparison is made to theoretical calculations of jet quenching in small systems, and to inclusive jet measurements in p–Pb collisions selected by event activity at the LHC and in d–Au collisions at RHIC.
Acharya, S., Adamová, D., Adolfsson, J., Aggarwal, M., Aglieri Rinella, G., Agnello, M., et al. (2018). Constraints on jet quenching in p–Pb collisions at √sNN = 5.02 TeV measured by the event-activity dependence of semi-inclusive hadron-jet distributions. PHYSICS LETTERS. SECTION B, 783, 95-113 [10.1016/j.physletb.2018.05.059].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/664157
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