Central-to-peripheral nuclear modification factors in Pb-Pb collisions at $\sqrt{s_{NN}}$= 17.3 GeV

We present central-to-peripheral nuclear modification factors, $R_{CP}$, for the $p_{T}$ distributions of $K_{S}^{0}$, $\Lambda$, $\bar{\Lambda}$, and negatively charged particles, measured at central rapidity in Pb-Pb collisions at top SPS energy. The data cover the 55% most central fraction of the...

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Detalles Bibliográficos
Autores principales: Antinori, F., Bacon, P.A., Badala, A., Barbera, R., Belogianni, A., Bloodworth, I.J., Bombara, M., Bruno, G.E., Bull, S.A., Caliandro, R., Campbell, M., Carena, Wisla, Carrer, N., Clarke, R.F., Dainese, A., Di Bari, D., Di Liberto, S., Divia, R., Elia, D., Evans, D., Feofilov, G.A., Fini, R.A., Ganoti, P., Ghidini, B., Grella, G., Helstrup, H., Hetland, K.F., Holme, A.K., Jacholkowski, A., Jones, G.T., Jovanovic, P., Jusko, A., Kamermans, R., Kinson, J.B., Knudson, K., Kondratiev, V., Kralik, I., Kravcakova, A., Kuijer, P., Lenti, V., Lietava, R., Lovhoiden, G., Manzari, V., Mazzoni, M.A., Meddi, F., Michalon, A., Morando, M., Norman, P.I., Palmeri, A., Pappalardo, G.S., Pastircak, B., Platt, R.J., Quercigh, E., Riggi, F., Rohrich, D., Romano, G., Safark, K., Sandor, L., Schillings, E., Segato, G., Sene, M., Sene, R., Snoeys, W., Soramel, F., Spyropoulou-Stassinaki, M., Staroba, P., Turrisi, R., Tveter, T.S., Urban, J., van de Ven, P., Vande Vyvre, P., Vascotto, A., Vik, T., Villalobos Baillie, O., Vinogradov, L., Virgili, T., Votruba, M.F., Vrlakova, J., Zavada, P.
Lenguaje:eng
Publicado: 2005
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2005.07.040
http://cds.cern.ch/record/852550
Descripción
Sumario:We present central-to-peripheral nuclear modification factors, $R_{CP}$, for the $p_{T}$ distributions of $K_{S}^{0}$, $\Lambda$, $\bar{\Lambda}$, and negatively charged particles, measured at central rapidity in Pb-Pb collisions at top SPS energy. The data cover the 55% most central fraction of the inelastic cross section. The $K_{S}^{0}$ and $\Lambda$ $R_{CP}$ $p_{T}$ are similar in shape to those measured at $\sqrt{s_{NN}}$ = 200 GeV at RHIC, though they are larger in absolute value. We have compared our $K_{S}^{0}$ $R_{CP}$ data to a theoretical calculation. The prediction overestimates the data at $p_{T}$ $\approx$ 3-4 GeV/$c$, unless sizeable parton energy loss is included in the calculation.

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