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

• Published in: Physics letters. B 2005-09, Vol.623 (1-2), p.17-25
• Main Authors: Antinori, F., Bacon, P.A., Badalà, A., Barbera, R., Belogianni, A., Bloodworth, I.J., Bombara, M., Bruno, G.E., Bull, S.A., Caliandro, R., Campbell, M., Carena, W., Carrer, N., Clarke, R.F., Dainese, A., Di Bari, D., Di Liberto, S., Divià, 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., Králik, I., Kravčáková, A., Kuijer, P., Lenti, V., Lietava, R., Løvhøiden, G., Manzari, V., Mazzoni, M.A., Meddi, F., Michalon, A., Morando, M., Norman, P.I., Palmeri, A., Pappalardo, G.S., Pastirčák, B., Platt, R.J., Quercigh, E., Riggi, F., Röhrich, D., Romano, G., Šafar̆ík, K., Šándor, L., Schillings, E., Segato, G., Sené, M., Sené, R., Snoeys, W., Soramel, F., Spyropoulou-Stassinaki, M., Staroba, P., Turrisi, R., Tveter, T.S., Urbán, J., van de Ven, P., Vande Vyvre, P., Vascotto, A., Vik, T., Villalobos Baillie, O., Vinogradov, L., Virgili, T., Votruba, M.F., Vrláková, J., Závada, P.
• Format: Article
• Language: English
• Subjects: Exact sciences and technology; Nuclear physics; Nucleus–nucleus collisions; Physics; Strange particles; The physics of elementary particles and fields
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2005.07.040

We present central-to-peripheral nuclear modification factors, RCP, for the pT distributions of KS0, Λ, Λ¯, 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 KS0 and ΛRCP(pT) are similar in shape to those measured at sNN=200 GeV at RHIC, though they are larger in absolute value. We have compared our KS0RCP data to a theoretical calculation. The prediction overestimates the data at pT≈3–4 GeV/c, unless sizeable parton energy loss is included in the calculation.