Central-to-peripheral nuclear modification factors in Pb - Pb collisions at √sNN = 17.3 GeV

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.; Carenag, W.; 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 E, 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.; Lvhiden, G.; Manzari, V.; Mazzoni, M. A.; Meddi, F.; Michalon, A.; Morando, Maurizio; Norman, P. I.; Palmeri, A.; Pappalardo, G. S.; Pastircak, B.; Platt, R. J.; Quercigh, E.; Riggi, F.; Rohrich, D.; Romano, G.; Safarik, K.; Sandor, L.; Schillings, E.; Segato, Gianfranco; Sene, M.; Sene, R.; Snoeys, W.; Soramel, Francesca; 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.

doi:10.1016/j.physletb.2005.07.040

We present central-to-peripheral nuclear modification factors, R-CP, for the (PT) distributions of K-S(0), Lambda, 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((PT)) are similar in shape to those measured at root sNN = 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 (PT) approximate to 3-4 GeV/c, unless sizeable parton energy loss is included in the calculation. (c) 2005 Elsevier B.V. All rights reserved.