Long-range two-particle correlations of strange hadrons with charged particles in pPb and PbPb collisions at LHC energies
Articolo
Data di Pubblicazione:
2015
Abstract:
Measurements of two-particle angular correlations between an identified strange hadron (K0
S or Λ/Λ)
and a charged particle, emitted in pPb collisions, are presented over a wide range in pseudorapidity
and full azimuth. The data, corresponding to an integrated luminosity of approximately 35 nb−1, were
collected at a nucleon–nucleon center-of-mass energy (
√sN N ) of 5.02 TeV with the CMS detector at
the LHC. The results are compared to semi-peripheral PbPb collision data at √sN N = 2.76 TeV, covering
similar charged-particle multiplicities in the events. The observed azimuthal correlations at large relative
pseudorapidity are used to extract the second-order (v2) and third-order (v3) anisotropy harmonics of K0
S
and Λ/Λ particles. These quantities are studied as a function of the charged-particle multiplicity in the
event and the transverse momentum of the particles. For high-multiplicity pPb events, a clear particle
species dependence of v2 and v3 is observed. For pT < 2 GeV, the v2 and v3 values of K0
S particles are
larger than those of Λ/Λ particles at the same pT. This splitting effect between two particle species is
found to be stronger in pPb than in PbPb collisions in the same multiplicity range. When divided by the
number of constituent quarks and compared at the same transverse kinetic energy per quark, both v2
and v3 for K0
S particles are observed to be consistent with those for Λ/Λ particles at the 10% level in
pPb collisions. This consistency extends over a wide range of particle transverse kinetic energy and event
multiplicities.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
CMS; Correlations; Flow; High-multiplicity; Long-range; Ridge; Nuclear and High Energy Physics
Elenco autori:
Khachatryan, V.; Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.; Frühwirth, R.; Ghete, V.M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; Kiesenhofer, W.; Knünz, V.; Krammer, M.; Krätschmer, I.; Liko, D.; Mikulec, I.; Rabady, D.; Rahbaran, B.; Rohringer, H.; Schöfbeck, R.; Strauss, J.; Taurok, A.; Treberer-Treberspurg, W.; Waltenberger, W.; Wulz, C.-E.; Mossolov, V.; Shumeiko, N.; Suarez Gonzalez, J.; Alderweireldt, S.; Bansal, M.; Bansal, S.; Cornelis, T.; De Wolf, E.A.; Janssen, X.; Knutsson, A.; Luyckx, S.; Ochesanu, S.; Rougny, R.; Van De Klundert, M.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Van Spilbeeck, A.; Blekman, F.; Blyweert, S.; D'Hondt, J.; Daci, N.; Heracleous, N.; Keaveney, J.; Lowette, S.; Maes, M.; Olbrechts, A.; Python, Q.; Strom, D.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Onsem, G.P.; Villella, I.; Caillol, C.; Clerbaux, B.; De Lentdecker, G.; Dobur, D.; Favart, L.; Gay, A.P.R.; Grebenyuk, A.; Léonard, A.; Mohammadi, A.; Perniè, L.; Reis, T.; Seva, T.; Thomas, L.; Vander Velde, C.; Vanlaer, P.; Wang, J.; Zenoni, F.; Adler, V.; Beernaert, K.; Benucci, L.; Cimmino, A.; Costantini, S.; Crucy, S.; Dildick, S.; Fagot, A.; Garcia, G.; Mccartin, J.; Ocampo Rios, A.A.; Ryckbosch, D.; Salva Diblen, S.; Sigamani, M.; Strobbe, N.; Thyssen, F.; Tytgat, M.; Yazgan, E.; Zaganidis, N.; Basegmez, S.; Beluffi, C.; Bruno, G.; Castello, R.; Caudron, A.; Ceard, L.; Da Silveira, G.G.; Delaere, C.; du Pree, T.; Favart, D.; Forthomme, L.; Giammanco, A.; Hollar, J.; Jafari, A.; Jez, P.; Komm, M.; Lemaitre, V.; Nuttens, C.; Pagano, D.; Perrini, L.; Pin, A.; Piotrzkowski, K.; Popov, A.; Quertenmont, L.; Selvaggi, M.; Vidal Marono, M.; Vizan Garcia, J.M.; Beliy, N.; Caebergs, T.; Daubie, E.; Hammad, G.H.; Aldá Júnior, W.L.; Alves, G.A.; Brito, L.; Correa Martins Junior, M.; Dos Reis Martins, T.; Mora Herrera, C.; Pol, M.E.; Carvalho, W.; Chinellato, J.; Custódio, A.; Da Costa, E.M.; De Jesus Damiao, D.; De Oliveira Martins, C.; Fonseca De Souza, S.; Malbouisson, H.; Matos Figueiredo, D.; Mundim, L.; Nogima, H.; Prado Da Silva, W.L.; Santaolalla, J.; Santoro, A.; Sznajder, A.; Tonelli Manganote, E.J.; Vilela Pereira, A.; Bernardes, C.A.; Dogra, S.; Fernandez Perez Tomei, T.R.; Gregores, E.M.; Mercadante, P.G.; Novaes, S.F.; Padula, Sandra S.; Aleksandrov, A.; Genchev, V.; Iaydjiev, P.; Marinov, A.; Piperov, S.; Rodozov, M.; Stoykova, S.; Sultanov, G.; Tcholakov, V.; Vutova, M.; Dimitrov, A.; Glushkov, I.; Hadjiiska, R.; Kozhuharov, V.; Litov, L.; Pavlov, B.; Petkov, P.; Bian, J.G.; Chen, G.M.; Chen, H.S.; Chen, M.; Du, R.; Jiang, C.H.; Plestina, R.; Tao, J.; Wang, Z.; Asawatangtrakuldee, C.; Ban, Y.; Liu, S.; Mao, Y.; Qian, S.J.; Wang, D.; Zhang, L.; Zou, W.; Avila, C.; Chaparro Sierra, L.F.; Florez, C.; Gomez, J.P.; Gomez Moreno, B.; Sanabria, J.C.; Godinovic, N.; Lelas, D.; Polic, D.; Puljak, I.; Antunovic, Z.; Kovac, M.; Brigljevic, V.; Kadija, K.; Luetic, J.; Mekterovic, D.; Sudic, L.; Attikis, A.; Mavromanolakis, G.; Mousa, J.; Nicolaou, C.; Ptochos, F.; Razis, P.A.; Bodlak, M.; Finger, M.; Finger, M.; Assran, Y.; Ellithi Kamel, A.; Mahmoud, M.A.; Radi, A.; Kadastik, M.; Murumaa, M.; Raidal, M.; Tiko, A.; Eerola, P.; Fedi, G.; Voutilainen, M.; Härkönen, J.; Karimäki, V.; Kinnunen, R.; Kortelainen, M.J.; Lampén, T.; Lassila-Perini, K.; Lehti, S.; Lindén, T.; Luukka, P.; Mäenpää, T.; Peltola, T.; Tuominen, E.; Tuominiemi, J.; Tuovinen, E.; Wendland, L.; Talvitie, J.; Tuuva, T.; Besancon, M.; Couderc, F.; Dejardin, M.; Denegri, D.; Fabbro, B.; Faure, J.L.; Favaro, C.; Ferri, F.; Ganjour, S.; Givernaud, A.; Gras, P.; Hamel de Monchenault, G.; Jarry, P.; Locci, E.; Malcles, J.; Rander, J.; Rosowsky, A.; Titov, M.; Baffioni, S.; Beaudette, F.; Busson, P.; Charlot, C.; Dahms, T.; Dalchenko, M.; Dobrzynski, L.; Filipovic, N.; Florent, A.; Granier de Cassagnac, R.; Mastrolorenzo, L.; Miné, P.; Mironov,
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