Frontemare di Trieste
Istituto Nazionale di Fisica Nucleare
Sezione di Trieste

Particle ratios

Figures 1 and 2 show the ratios of Σ and Ξ, π and K for ALICE and STAR, and compare the ratios with a theoretical calculation from F. Becattini et al. The theoretical values for the Ξ , the π and the K has been extracted from “Predictions of hadron abundances in pp collisions at the LHC”, F. Becattini, P. Castorina, A. Milov and H. Satz, J. Phys. G38 (2011) 025002. The model is a statistical hadronization model with T = 170 MeV and γS = 0.6. The values for the Σ has been provided by the author as private communication and was obtained with the same model. The STAR value for the Σ was published in Phys Rev Lett 97, 132301 (2006). The ALICE value for the Ξ was published in Phys. Lett. B 712 (2012) 309-318, the one for STAR in Phys. Rev. C 75, 064901 (2007). Finally, the STAR values for pions and kaons were extracted from Phys. Rev. C 71, 064902 (2005) and ref. therein.

2012-Jul-27-ratio_Sigmastar_Xi.png

Figure 1: Ratio Σ

2012-Jul-27-ratio_Sigmastar_others.png

Figure 2: Ratio Σ, π and K.

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