The influence of net-quarks on the yields and rapidity spectra of identified hadrons

TL;DR

This paper uses a quark combination model to analyze how net-quarks influence the yields and rapidity spectra of various identified hadrons in central Au+Au collisions at 200 GeV, successfully describing experimental data and predicting distributions for several hadrons.

Contribution

It introduces a detailed analysis of net-quark effects on hadron production and rapidity spectra, providing predictions for various hadrons' distributions in high-energy nuclear collisions.

Findings

Data on multiplicities and rapidity distributions are well described.

Net-quarks significantly affect the rapidity spectra of hadrons.

Predictions for the rapidity distributions of several strange and multi-strange hadrons are provided.

Abstract

Within a quark combination model, we study systematically the yields and rapidity spectra of various hadrons in central Au+Au collisions at $\sqrt{s_{NN}}= 200$ GeV. We find that considering the difference in rapidity between net-quarks and newborn quarks, the data of multiplicities, rapidity distributions for $\pi^{\pm}$, $K^{\pm}$, $p(\bar{p})$ and, in particular the ratios of charged antihadron to hadron as a function of rapidity, can be well described. The effect of net-quarks on various hadrons is analysed, and the rapidity distributions for $K^{0}_{s}$, $\Lambda(\bar{\Lambda})$, $\Sigma^{+}(\bar{\Sigma}^{_-})$, $\mathrm{\Xi^{-}}$ ($\mathrm{\bar{\Xi}^{_+}}$) and $\mathrm{\Omega^{-}}(\mathrm{\bar{\Omega}}^{_+})$ are predicted. We discuss the rapidity distribution of net-baryon, and find that it reflects exactly the energy loss of colliding nuclei.