Analysis of the apparent nuclear modification in peripheral Pb-Pb collisions at 5.02 TeV
Acharya, S. and Acosta, F. T. and Adamova, D. and Adolfsson, J. and
Aggarwal, M. M. and Rinella, G. Aglieri and Agnello, M. and Agrawal, N.
and Ahammed, Z. and Ahn, S. U. and Aiola, S. and Akindinov, A. and
Al-Turany, M. and Alam, S. N. and Albuquerque, D. S. D. and Aleksandrov,
D. and Alessandro, B. and Alfaro Molina, R. and Ali, Y. and Alici, A.
and Alkin, A. and Alme, J. and Alt, T. and Altenkamper, L. and
Altsybeev, I and Anaam, M. N. and Andrei, C. and Andreou, D. and
Andrews, H. A. and Andronic, A. and Angeletti, M. and Anguelov, V and
Anson, C. and Anticic, T. and Antinori, F. and Antonioli, P. and Anwar,
R. and Apadula, N. and Aphecetche, L. and Appelshaeuser, H. and Arcelli,
S. and Arnaldi, R. and Arnold, O. W. and Arsene, I. C. and Arslandok, M.
and Augustinus, A. and Averbeck, R. and Azmi, M. D. and Badala, A. and
Baek, Y. W. and Bagnasco, S. and Bailhache, R. and Bala, R. and
Baldisseri, A. and Ball, M. and Baral, R. C. and Barbano, A. M. and
Barbera, R. and Barile, F. and Barioglio, L. and Barnafoldi, G. G. and
Barnby, L. S. and Barret, V and Bartalini, P. and Barth, K. and Bartsch,
E. and Bastid, N. and Basu, S. and Batigne, G. and Batyunya, B. and
Batzing, P. C. and Bazo Alba, J. L. and Bearden, I. G. and Beck, H. and
Bedda, C. and Behera, N. K. and Belikov, I and Bellini, F. and Bello
Martinez, H. and Bellwied, R. and Beltran, L. G. E. and Belyaev, V and
Bencedi, G. and Beole, S. and Bercuci, A. and Berdnikov, Y. and Berenyi,
D. and Bertens, R. A. and Berzano, D. and Betev, L. and Bhaduri, P. P.
and Bhasin, A. and Bhat, I. R. and Bhatt, H. and Bhattacharjee, B. and
Bhom, J. and Bianchi, A. and Bianchi, L. and Bianchi, N. and Bielcik, J.
and Bielcikova, J. and Bilandzic, A. and Biro, G. and Biswas, R. and
Biswas, S. and Blair, J. T. and Blau, D. and Blume, C. and Boca, G. and
Bock, F. and Bogdanov, A. and Boldizsar, L. and Bombara, M. and Bonomi,
G. and Bonora, M. and Borel, H. and Borissov, A. and Borri, M. and
Botta, E. and Bourjau, C. and Bratrud, L. and Braun-Munzinger, P. and
Bregant, M. and Broker, T. A. and Broz, M. and Brucken, E. J. and Bruna,
E. and Bruno, G. E. and Budnikov, D. and Buesching, H. and Bufalino, S.
and Buhler, P. and Buncic, P. and Busch, O. and Buthelezi, Z. and Butt,
J. B. and Buxton, J. T. and Cabala, J. and Caffarri, D. and Caines, H.
and Caliva, A. and Calvo Villar, E. and Camacho, R. S. and Camerini, P.
and Capon, A. A. and Carena, F. and Carena, W. and Carnesecchi, F. and
Castellanos, J. Castillo and Castro, A. J. and Casula, E. A. R. and
Ceballos Sanchez, C. and Chandra, S. and Chang, B. and Chang, W. and
Chapeland, S. and Chartier, M. and Chattopadhyay, S. and Chauvin, A. and
Cheshkov, C. and Cheynis, B. and Barroso, V. Chibante and Chinellato, D.
D. and Cho, S. and Chochula, P. and Chowdhury, T. and Christakoglou, P.
and Christensen, C. H. and Christiansen, P. and Chujo, T. and Chung, S.
U. and Cicalo, C. and Cifarelli, L. and Cindolo, F. and Cleymans, J. and
Colamaria, F. and Colella, D. and Collu, A. and Colocci, M. and Concas,
M. and Balbastre, G. Conesa and del Valle, Z. Conesa and Contreras, J.
G. and Cormier, T. M. and Morales, Y. Corrales and Cortese, P. and
Cosentino, M. R. and Costa, F. and Costanza, S. and Crkovska, J. and
Crochet, P. and Cuautle, E. and Cunqueiro, L. and Dahms, T. and Dainese,
A. and Dani, S. and Danisch, M. C. and Danu, A. and Das, D. and Das, I
and Das, S. and Dash, A. and Dash, S. and De, S. and De Caro, A. and de
Cataldo, G. and de Conti, C. and de Cuveland, J. and De Falco, A. and De
Gruttola, D. and De Marco, N. and De Pasquale, S. and De Souza, R. D.
and Degenhardt, H. F. and Deisting, A. and Deloff, A. and Delsanto, S.
and Deplano, C. and Dhankher, P. and Di Bari, D. and Di Mauro, A. and Di
Ruzza, B. and Diaz, R. A. and Dietel, T. and Dillenseger, P. and Ding,
Y. and Divia, R. and Djuvsland, O. and Dobrin, A. and Domenicis Gimenez,
D. and Doenigus, B. and Dordic, O. and Doremalen, L. V. R. and Dubey, A.
K. and Dubla, A. and Ducroux, L. and Dudi, S. and Duggal, A. K. and
Dukhishyam, M. and Dupieux, P. and Ehlers, R. J. and Elia, D. and
Endress, E. and Engel, H. and Epple, E. and Erazmus, B. and Erhardt, F.
and Ersdal, M. R. and Espagnon, B. and Eulisse, G. and Eum, J. and
Evans, D. and Evdokimov, S. and Fabbietti, L. and Faggin, M. and Faivre,
J. and Fantoni, A. and Fasel, M. and Feldkamp, L. and Feliciello, A. and
Feofilov, G. and Fernandez Tellez, A. and Ferretti, A. and Festanti, A.
and Feuillard, V. J. G. and Figiel, J. and Figueredo, M. A. S. and
Filchagin, S. and Finogeev, D. and Fionda, F. M. and Fiorenza, G. and
Flor, F. and Floris, M. and Foertsch, S. and Foka, P. and Fokin, S. and
Fragiacomo, E. and Francescon, A. and Francisco, A. and Frankenfeld, U.
and Fronze, G. G. and Fuchs, U. and Furget, C. and Furs, A. and Girard,
M. Fusco and Gaardhoje, J. J. and Gagliardi, M. and Gago, A. M. and
Gajdosova, K. and Gallio, M. and Galvan, C. D. and Ganoti, P. and
Garabatos, C. and Garcia-Solis, E. and Garg, K. and Gargiulo, C. and
Gasik, P. and Gauger, E. F. and Gay Ducati, M. B. and Germain, M. and
Ghosh, J. and Ghosh, P. and Ghosh, S. K. and Gianotti, P. and
Giubellino, P. and Giubilato, P. and Glaessel, P. and Gomez Coral, D. M.
and Ramirez, A. Gomez and Gonzalez, V and Gonzalez-Zamora, P. and
Gorbunov, S. and Gorlich, L. and Gotovac, S. and Grabski, V and
Graczykowski, L. K. and Graham, K. L. and Greiner, L. and Grelli, A. and
Grigoras, C. and Grigoriev, V and Grigoryan, A. and Grigoryan, S. and
Gronefeld, J. M. and Grosa, F. and Grosse-Oetringhaus, J. F. and Grosso,
R. and Guernane, R. and Guerzoni, B. and Guittiere, M. and Gulbrandsen,
K. and Gunji, T. and Gupta, A. and Gupta, R. and Guzman, I. B. and
Haake, R. and Habib, M. K. and Hadjidakis, C. and Hamagaki, H. and
Hamar, G. and Hamid, M. and Hamon, J. C. and Hannigan, R. and Haque, M.
R. and Harlenderova, A. and Harris, J. W. and Harton, A. and Hassan, H.
and Hatzifotiadou, D. and Hayashi, S. and Heckel, S. T. and Hellbaer, E.
and Helstrup, H. and Herghelegiu, A. and Hernandez, E. G. and Herrera
Corral, G. and Herrmann, F. and Hetland, K. F. and Hilden, T. E. and
Hillemanns, H. and Hills, C. and Hippolyte, B. and Hohlweger, B. and
Horak, D. and Hornung, S. and Hosokawa, R. and Hota, J. and Hristov, P.
and Huang, C. and Hughes, C. and Huhn, P. and Humanic, T. J. and
Hushnud, H. and Hussain, N. and Hussain, T. and Hutter, D. and Hwang, D.
S. and Iddon, J. P. and Iga Buitron, S. A. and Ilkaev, R. and Inaba, M.
and Ippolitov, M. and Islam, M. S. and Ivanov, M. and Ivanov, V and
Izucheev, V and Jacak, B. and Jacazio, N. and Jacobs, P. M. and Jadhav,
M. B. and Jadlovska, S. and Jadlovsky, J. and Jaelani, S. and Jahnke, C.
and Jakubowska, M. J. and Janik, M. A. and Jena, C. and Jercic, M. and
Jevons, O. and Bustamante, R. T. Jimenez and Jin, M. and Jones, P. G.
and Jusko, A. and Kalinak, P. and Kalweit, A. and Kang, J. H. and
Kaplin, V and Kar, S. and Uysal, A. Karasu and Karavichev, O. and
Karavicheva, T. and Karczmarczyk, P. and Karpechev, E. and Kebschull, U.
and Keidel, R. and Keijdener, D. L. D. and Keil, M. and Ketzer, B. and
Khabanova, Z. and Khan, A. M. and Khan, S. and Khan, S. A. and
Khanzadeev, A. and Kharlov, Y. and Khatun, A. and Khuntia, A. and
Kielbowicz, M. M. and Kileng, B. and Kim, B. and Kim, D. and Kim, D. J.
and Kim, E. J. and Kim, H. and Kim, J. S. and Kim, J. and Kim, M. and
Kim, S. and Kim, T. and Kirsch, S. and Kisel, I and Kiselev, S. and
Kisiel, A. and Klay, J. L. and Klein, C. and Klein, J. and
Klein-Boesing, C. and Klewin, S. and Kluge, A. and Knichel, M. L. and
Knospe, A. G. and Kobdaj, C. and Kofarago, M. and Koehler, M. K. and
Kollegger, T. and Kondratyeva, N. and Kondratyuk, E. and Konevskikh, A.
and Konopka, P. J. and Konyushikhin, M. and Kovalenko, O. and Kovalenko,
V and Kowalski, M. and Kralik, I and Kravcakova, A. and Kreis, L. and
Krivda, M. and Krizek, F. and Krueger, M. and Kryshen, E. and Krzewicki,
M. and Kubera, A. M. and Kucera, V and Kuhn, C. and Kuijer, P. G. and
Kumar, J. and Kumar, L. and Kumar, S. and Kundu, S. and Kurashvili, P.
and Kurepin, A. and Kurepin, A. B. and Kuryakin, A. and Kushpil, S. and
Kvapil, J. and Kweon, M. J. and Kwon, Y. and La Pointe, S. L. and La
Rocca, P. and Lai, Y. S. and Lakomov, I and Langoy, R. and Lapidus, K.
and Lardeux, A. and Larionov, P. and Laudi, E. and Lavicka, R. and Lea,
R. and Leardini, L. and Lee, S. and Lehas, F. and Lehner, S. and
Lehrbach, J. and Lemmon, R. C. and Leon Monzon, I and Levai, P. and Li,
X. and Li, X. L. and Lien, J. and Lietava, R. and Lim, B. and Lindal, S.
and Lindenstruth, V and Lindsay, S. W. and Lippmann, C. and Lisa, M. A.
and Litichevskyi, V and Liu, A. and Ljunggren, H. M. and Llope, W. J.
and Lodato, D. F. and Loginov, V and Loizides, C. and Loncar, P. and
Lopez, X. and Lopez Torres, E. and Lowe, A. and Luettig, P. and Luhder,
J. R. and Lunardon, M. and Luparello, G. and Lupi, M. and Maevskaya, A.
and Mager, M. and Mahmood, S. M. and Maire, A. and Majka, R. D. and
Malaev, M. and Malik, Q. W. and Malinina, L. and Mal'Kevich, D. and
Malzacher, P. and Mamonov, A. and Manko, V and Manso, F. and Manzari, V
and Mao, Y. and Marchisone, M. and Mares, J. and Margagliotti, V, G. and
Margotti, A. and Margutti, J. and Marin, A. and Markert, C. and
Marquard, M. and Martin, N. A. and Martinengo, P. and Martinez, J. L.
and Martinez, I, M. and Garcia, G. Martinez and Pedreira, M. Martinez
and Masciocchi, S. and Masera, M. and Masoni, A. and Massacrier, L. and
Masson, E. and Mastroserio, A. and Mathis, A. M. and Matuoka, P. F. T.
and Matyja, A. and Mayer, C. and Mazzilli, M. and Mazzoni, M. A. and
Meddi, F. and Melikyan, Y. and Menchaca-Rocha, A. and Meninno, E. and
Perez, J. Mercado and Meres, M. and Meza, C. S. and Mhlanga, S. and
Miake, Y. and Micheletti, L. and Mieskolainen, M. M. and Mihaylov, D. L.
and Mikhaylov, K. and Mischke, A. and Mishra, A. N. and Miskowiec, D.
and Mitra, J. and Mitu, C. M. and Mohammadi, N. and Mohanty, A. P. and
Mohanty, B. and Khan, M. Mohisin and De Godoy, D. A. Moreira and Moreno,
L. A. P. and Moretto, S. and Morreale, A. and Morsch, A. and Mrnjavac,
T. and Muccifora, V and Mudnic, E. and Muehlheim, D. and Muhuri, S. and
Mukherjee, M. and Mulligan, J. D. and Munhoz, M. G. and Muenning, K. and
Munoz, M. I. A. and Munzer, R. H. and Murakami, H. and Murray, S. and
Musa, L. and Musinsky, J. and Myers, C. J. and Myrcha, J. W. and Naik,
B. and Nair, R. and Nandi, B. K. and Nania, R. and Nappi, E. and
Narayan, A. and Naru, M. U. and Nassirpour, A. F. and Natal da Luz, H.
and Nattrass, C. and Navarro, S. R. and Nayak, K. and Nayak, R. and
Nayak, T. K. and Nazarenko, S. and De Oliveira, R. A. Negrao and Nellen,
L. and Nesbo, V, S. and Neskovic, G. and Ng, F. and Nicassio, M. and
Niedziela, J. and Nielsen, B. S. and Nikolaev, S. and Nikulin, S. and
Nikulin, V and Noferini, F. and Nomokonov, P. and Nooren, G. and Noris,
J. C. C. and Norman, J. and Nyanin, A. and Nystrand, J. and Oh, H. and
Ohlson, A. and Oleniacz, J. and Oliveira Da Silva, A. C. and Oliver, M.
H. and Onderwaater, J. and Oppedisano, C. and Orava, R. and Oravec, M.
and Ortiz Velasquez, A. and Oskarsson, A. and Otwinowski, J. and Oyama,
K. and Pachmayer, Y. and Pacik, V and Pagano, D. and Paic, G. and Palni,
P. and Pan, J. and Pandey, A. K. and Panebianco, S. and Papikyan, V and
Pareek, P. and Park, J. and Parkkila, J. E. and Parmar, S. and Passfeld,
A. and Pathak, S. P. and Patra, R. N. and Paul, B. and Pei, H. and
Peitzmann, T. and Peng, X. and Pereira, L. G. and Da Costa, H. Pereira
and Peresunko, D. and Lezama, E. Perez and Peskov, V and Pestov, Y. and
Petracek, V and Petrovici, M. and Petta, C. and Pezzi, R. P. and Piano,
S. and Pikna, M. and Pillot, P. and Pimentel, L. O. D. L. and Pinazza,
O. and Pinsky, L. and Pisano, S. and Piyarathna, D. B. and Ploskon, M.
and Planinic, M. and Pliquett, F. and Pluta, J. and Pochybova, S. and
Podesta-Lerma, P. L. M. and Poghosyan, M. G. and Polichtchouk, B. and
Poljak, N. and Poonsawat, W. and Pop, A. and Poppenborg, H. and
Porteboeuf-Houssais, S. and Pozdniakov, V and Prasad, S. K. and
Preghenella, R. and Prino, F. and Pruneau, C. A. and Pshenichnov, I and
Puccio, M. and Punin, V and Putschke, J. and Raha, S. and Rajput, S. and
Rak, J. and Rakotozafindrabe, A. and Ramello, L. and Rami, F. and
Raniwala, R. and Raniwala, S. and Rasanen, S. S. and Rascanu, B. T. and
Ratza, V and Ravasenga, I and Read, K. F. and Redlich, K. and Rehman, A.
and Reichelt, P. and Reidt, F. and Ren, X. and Renfordt, R. and
Reshetin, A. and Revol, J-P and Reygers, K. and Riabov, V and Richert,
T. and Richter, M. and Riedler, P. and Riegler, W. and Riggi, F. and
Ristea, C. and Rode, S. P. and Rodriguez Cahuantzi, M. and Roed, K. and
Rogalev, R. and Rogochaya, E. and Rohr, D. and Rohrich, D. and Rokita,
P. S. and Ronchetti, F. and Rosas, E. D. and Roslon, K. and Rosnet, P.
and Rossi, A. and Rotondi, A. and Roukoutakis, F. and Roy, C. and Roy,
P. and Rueda, V, O. and Rui, R. and Rumyantsev, B. and Rustamov, A. and
Ryabinkin, E. and Ryabov, Y. and Rybicki, A. and Saarinen, S. and Sadhu,
S. and Sadovsky, S. and Safarik, K. and Saha, S. K. and Sahoo, B. and
Sahoo, P. and Sahoo, R. and Sahoo, S. and Sahu, P. K. and Saini, J. and
Sakai, S. and Saleh, M. A. and Sambyal, S. and Samsonov, V and Sandoval,
A. and Sarkar, A. and Sarkar, D. and Sarkar, N. and Sarma, P. and Sas,
M. H. P. and Scapparone, E. and Scarlassara, F. and Schaefer, B. and
Scheid, H. S. and Schiaua, C. and Schicker, R. and Schmidt, C. and
Schmidt, H. R. and Schmidt, M. O. and Schmidt, M. and Schmidt, V, N. and
Schukraft, J. and Schutz, Y. and Schwarz, K. and Schweda, K. and Scioli,
G. and Scomparin, E. and Sefcik, M. and Seger, J. E. and Sekiguchi, Y.
and Sekihata, D. and Selyuzhenkov, I and Senyukov, S. and Serradilla, E.
and Sett, P. and Sevcenco, A. and Shabanov, A. and Shabetai, A. and
Shahoyan, R. and Shaikh, W. and Shangaraev, A. and Sharma, A. and
Sharma, M. and Sharma, N. and Sheikh, I, A. and Shigaki, K. and
Shimomura, M. and Shirinkin, S. and Shou, Q. and Shtejer, K. and
Sibiriak, Y. and Siddhanta, S. and Sielewicz, K. M. and Siemiarczuk, T.
and Silvermyr, D. and Simatovic, G. and Simonetti, G. and Singaraju, R.
and Singh, R. and Singhal, V and Sinha, T. and Sitar, B. and Sitta, M.
and Skaali, T. B. and Slupecki, M. and Smirnov, N. and Snellings, R. J.
M. and Snellman, T. W. and Song, J. and Soramel, F. and Sorensen, S. and
Sozzi, F. and Sputowska, I and Stachel, J. and Stan, I and Stankus, P.
and Stenlund, E. and Stocco, D. and Storetvedt, M. M. and Strmen, P. and
Suaide, A. A. P. and Sugitate, T. and Suire, C. and Suleymanov, M. and
Suljic, M. and Sultanov, R. and Sumbera, M. and Sumowidagdo, S. and
Suzuki, K. and Swain, S. and Szabo, A. and Szarka, I and Tabassam, U.
and Takahashi, J. and Tambave, G. J. and Tanaka, N. and Tarhini, M. and
Tariq, M. and Tarzila, M. G. and Tauro, A. and Tejeda Munoz, G. and
Telesca, A. and Terrevoli, C. and Teyssier, B. and Thakur, D. and
Thakur, S. and Thomas, D. and Thoresen, F. and Tieulent, R. and
Tikhonov, A. and Timmins, A. R. and Toia, A. and Topilskaya, N. and
Toppi, M. and Torres, S. R. and Tripathy, S. and Trogolo, S. and
Trombetta, G. and Tropp, L. and Trubnikov, V and Trzaska, W. H. and
Trzcinski, T. P. and Trzeciak, B. A. and Tsuji, T. and Tumkin, A. and
Turrisi, R. and Tveter, T. S. and Ullaland, K. and Umaka, E. N. and
Uras, A. and Usai, G. L. and Utrobicic, A. and Vala, M. and Van Hoorne,
J. W. and van Leeuwen, M. and Vande Vyvre, P. and Varga, D. and Vargas,
A. and Vargyas, M. and Varma, R. and Vasileiou, M. and Vasiliev, A. and
Vauthier, A. and Doce, O. Vazquez and Vechernin, V. and Veen, A. M. and
Vercellin, E. and Vergara Limon, S. and Vermunt, L. and Vernet, R. and
Vertesi, R. and Vickovic, L. and Viinikainen, J. and Vilakazi, Z. and
Baillie, O. Villalobos and Villatoro Tello, A. and Vinogradov, A. and
Virgili, T. and Vislavicius, V. and Vodopyanov, A. and Voelkl, M. A. and
Voloshin, K. and Voloshin, S. A. and Volpe, G. and von Haller, B. and
Vorobyev, I and Voscek, D. and Vranic, D. and Vrlakova, J. and Wagner,
B. and Wang, H. and Wang, M. and Watanabe, Y. and Weber, M. and Weber,
S. G. and Wegrzynek, A. and Weiser, D. F. and Wenzel, S. C. and Wessels,
J. P. and Westerhoff, U. and Whitehead, A. M. and Wiechula, J. and
Wikne, J. and Wilk, G. and Wilkinson, J. and Willems, G. A. and
Williams, M. C. S. and Willsher, E. and Windelband, B. and Witt, W. E.
and Xu, R. and Yalcin, S. and Yamakawa, K. and Yano, S. and Yin, Z. and
Yokoyama, H. and Yoo, I-K and Yoon, J. H. and Yurchenko, V and Zaccolo,
V and Zaman, A. and Zampolli, C. and Zanoli, H. J. C. and Zardoshti, N.
and Zarochentsev, A. and Zavada, P. and Zaviyalov, N. and Zbroszczyk, H.
and Zhalov, M. and Zhang, X. and Zhang, Y. and Zhang, Z. and Zhao, C.
and Zherebchevskii, V and Zhigareva, N. and Zhou, D. and Zhou, Y. and
Zhou, Z. and Zhu, H. and Zhu, J. and Zhu, Y. and Zichichi, A. and
Zimmermann, M. B. and Zinovjev, G. and Zmeskal, J. and Zou, S. and ALICE
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Abstract
Charged-particle spectra at midrapidity are measured in Pb-Pb collisions
at the centre-of-mass energy per nucleon-nucleon pair root s(NN) = 5.02
TeV and presented in centrality classes ranging from most central
(0-5\%) to most peripheral (95-100\%) collisions. Possible medium
effects are quantified using the nuclear modification factor (R-AA) by
comparing the measured spectra with those from proton-proton collisions,
scaled by the number of independent nucleon-nucleon collisions obtained
from a Glauber model. At large transverse momenta (8 < p(T) < 20 GeV/c),
the average R-AA is found to increase from about 0.15 in 0-5\% central
to a maximum value of about 0.8 in 75-85\% peripheral collisions, beyond
which it falls off strongly to below 0.2 for the most peripheral
collisions. Furthermore, R-AA initially exhibits a positive slope as a
function of p(T) in the 8-20 GeV/c interval, while for collisions beyond
the 80\% class the slope is negative. To reduce uncertainties related to
event selection and normalization, we also provide the ratio of R-AA in
adjacent centrality intervals. Our results in peripheral collisions are
consistent with a PYTHIA-based model without nuclear modification,
demonstrating that biases caused by the event selection and collision
geometry can lead to the apparent suppression in peripheral collisions.
This explains the unintuitive observation that R-AA is below unity in
peripheral Pb-Pb, but equal to unity in minimum-bias p-Pb collisions
despite similar charged-particle multiplicities. (C) 2019 Conseil
Europeen pour la Recherche Nucleaire. Published by Elsevier B.V.... Show more Show less