English

Geometrical scaling for identified particles

High Energy Physics - Phenomenology 2013-11-27 v3

Abstract

We show that recently measured transverse momentum spectra of identified particles exhibit geometrical scaling (GS) in scaling variable τm~T=(m~T/Q0)2(m~T/W)λ\tau_{\tilde{m}_{\rm T}}=(\tilde{m}_{\rm T}/Q_0)^{2} (\tilde{m}_{\rm T}/ W)^{\lambda} where m~T=m2+pT2m\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.

Keywords

Cite

@article{arxiv.1308.5911,
  title  = {Geometrical scaling for identified particles},
  author = {Michal Praszalowicz},
  journal= {arXiv preprint arXiv:1308.5911},
  year   = {2013}
}

Comments

17 pages, 4 figures, in v2 some references added, v3 accepted in Phys. Lett. B, minor typos corrected

R2 v1 2026-06-22T01:15:54.113Z