Kaon and Lambda productions in relativistic heavy ion collisions

Abstract

A microscopic approach has been employed to study the kaon and $\Lambda$ productions in heavy ion collisions. The productions of $K^{+}$ and $\Lambda$ have been studied within the framework of Boltzmann transport equation for various beam energies. We find a non-monotonic horn like structure for $K^{+}/{\pi }^{+}$ and $\Lambda /\pi$ when plotted against centre of mass energies (${\sqrt{s}}_{\mathrm{N}N}$) with the assumption of initial partonic phase for ${\sqrt{s}}_{\mathrm{N}N}$ beyond a certain threshold. However, the ratio $K^{+}/{\pi }^{+}$ shows a monotonic nature when a hadronic initial state is considered for all ${\sqrt{s}}_{\mathrm{N}N}$. Experimental values of $K^{-}/{\pi }^{-}$ for different $\sqrt{s_{\mathrm{N}N}}$ are also reproduced within the ambit of the same formalism.

Comments: Spurious Tex file removed