English

Proton-lambda correlation functions at the LHC with account for residual correlations

High Energy Physics - Phenomenology 2015-10-28 v1 High Energy Physics - Experiment Nuclear Experiment Nuclear Theory

Abstract

The theoretical analysis of pˉΛpΛˉ\bar{p}-\Lambda \oplus p-\bar{\Lambda} correlation function in 10% most central Au+Au collisions at RHIC energy sNN=200\sqrt{s_{NN}}=200 GeV shows that the contribution of residual correlations is the necessary factor to obtain a satisfactory description of the experimental data. A neglecting of the residual correlation effect, leads to unrealistically low source radius, about 2 times smaller than the corresponding value for pΛpˉΛˉp-\Lambda \oplus \bar{p}-\bar{\Lambda} case, when one fits the experimental correlation function within Lednicky-Lyuboshitz analytical model. Recently an approach accounting effectively for residual correlations for the baryon-antibaryon correlation function was proposed, and a good RHIC data description was reached with the source radius extracted from the hydrokinetic model (HKM). The pˉΛ\bar{p}-\Lambda scattering length, as well as the parameters characterizing the residual correlation effect --- annihilation dip amplitude and its inverse width --- were extracted from the corresponding fit. In this paper we use these extracted values and simulated in HKM source functions for Pb+Pb collisions at the LHC energy sNN=2.76\sqrt{s_{NN}}=2.76 TeV to predict the corresponding pΛp\Lambda and pΛˉp\bar{\Lambda} correlation functions.

Keywords

Cite

@article{arxiv.1509.04245,
  title  = {Proton-lambda correlation functions at the LHC with account for residual correlations},
  author = {V. M. Shapoval and Yu. M. Sinyukov and V. Yu. Naboka},
  journal= {arXiv preprint arXiv:1509.04245},
  year   = {2015}
}

Comments

13 pages, 5 figures

R2 v1 2026-06-22T10:56:26.145Z