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arXiv · 1308.5911

Geometrical scaling for identified particles

Michal Praszalowicz
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Abstract

We show that recently measured transverse momentum spectra of identified particles exhibit geometrical scaling (GS) in scaling variable $τ_{\tilde{m}_{\rm T}}=(\tilde{m}_{\rm T}/Q_0)^{2} (\tilde{m}_{\rm T}/ W)^λ$ where $\tilde{m}_{\rm T}=\sqrt{m^2+p^2_{\rm T}}-m$. We explore consequences of GS and show that both mid rapidity multiplicity and mean transverse momenta grow as powers of scattering energy. Furthermore, assuming Tsallis-like parametrization of the spectra we calculate the coefficients of this growth. We also show that Tsallis temperature is related to the average saturation scale.

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Michal Praszalowicz. 2013-11-26. Geometrical scaling for identified particles. https://doi.org/10.1016/j.physletb.2013.10.067

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