We present central-to-peripheral nuclear modification factors, RCP, for the pT distributions of K0, Λ, bar 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 K0 and Λ RCP(pT) are similar in shape to those measured at root (s) = 200 GeV at RHIC, though they are larger in absolute value. We have compared our K0 RCP 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.
Central-to-peripheral nuclear modification factors in Pb–Pb collisions at root s = 17.3 GeV
GRELLA, Giuseppe;ROMANO, Giorgio;VIRGILI, Tiziano;
2005
Abstract
We present central-to-peripheral nuclear modification factors, RCP, for the pT distributions of K0, Λ, bar 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 K0 and Λ RCP(pT) are similar in shape to those measured at root (s) = 200 GeV at RHIC, though they are larger in absolute value. We have compared our K0 RCP 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.File in questo prodotto:
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