Long-range two-particle correlations of strange hadrons with charged particles in pPb and PbPb collisions at LHC energies

Measurements of two-particle angular correlations between an identified strange hadron (KS0 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, we...

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Veröffentlicht in:	Physics letters. B 2015-03, Vol.742 (C), p.200-224
Hauptverfasser:	Sirunyan, A.M., Waltenberger, W., Wulz, C.-E., De Wolf, E.A., Van De Klundert, M., Blekman, F., Heracleous, N., Mccartin, J., Salva Diblen, S., Strobbe, N., Tytgat, M., Yazgan, E., Beliy, N., Brito, L., Sznajder, A., Iaydjiev, P., Marinov, A., Ellithi Kamel, A., Favaro, C., Yilmaz, Y., Brodski, M., Hebbeker, T., Hoehle, F., Bell, A.J., Calligaris, L., Costanza, F., Melzer-Pellmann, I.-A., Wissing, C., Erfle, J., Troendle, D., Berger, J., Quast, G., Markou, A., Kesisoglou, S., Mohanty, G.B., Goldouzian, R., Iaselli, G., Pompili, A., Radogna, R., Selvaggi, G., Gonzi, S., Ferretti, R., Biasotto, M., Lacaprara, S., Margoni, M., Menichelli, M., Boccali, T., Giassi, A., Umer, T., Kazana, M., Gallinaro, M., Smirnov, V., Dermenev, A., Kirsanov, M., Bitioukov, S., Pérez-Calero Yzquierdo, A., Gomez, G., Scodellaro, L., Kotlinski, D., Quittnat, M., Chao, Y., Akin, I.V., Frazier, R., Goldstein, J., Kreczko, L., Womersley, W.J., Pesaresi, M., Teodorescu, L., Dittmann, J., Liu, H., Berry, E., Swanson, J., Ko, W., Smith, J., Andrews, W., Holzner, A., Macneill, I., Campagnari, C., Apresyan, A., Paulini, M., Vogel, H., Ford, W.T., Nauenberg, U., Tucker, J., Elvira, V.D., Johnson, M., Vaandering, E.W., Bortignon, P., Hadley, N.J., Kolberg, T., Barbieri, R., Di Matteo, L., Lai, Y.S., Lee, Y.-J., Mucia, N., Won, S., Ruchti, R., Park, M., Dragoiu, C., Gurrola, A.
Format:	Artikel
Sprache:	eng
Schlagworte:	CMS Correlations Flow High Energy Physics - Experiment High-multiplicity Long-range Nuclear Experiment Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Ridge
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Beschreibung
Zusammenfassung:	Measurements of two-particle angular correlations between an identified strange hadron (KS0 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 (sNN) of 5.02 TeV with the CMS detector at the LHC. The results are compared to semi-peripheral PbPb collision data at sNN=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 KS0 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
ISSN:	0370-2693 1873-2445
DOI:	10.1016/j.physletb.2015.01.034