Wounded-quark emission function at the top energy available at the BNL Relativistic Heavy Ion Collider

The wounded nucleon and quark emission functions are extracted for different centralities in $d+\mathrm{Au}$ collisions at $\sqrt{s}=200\text{GeV}$ using Monte Carlo simulations and experimental data. The shape of the emission function depends on centrality in the wounded nucleon model, whereas it is practically universal (within uncertainties) in the wounded quark model. Predictions for $d{N}_{ch}/d\eta$ distributions in $p+\mathrm{Au}$ and ${}^3\mathrm{He}+\mathrm{Au}$ collisions are presented.

Figure 1

The wounded nucleon emission functions in different centrality classes extracted from the wounded nucleon model using $d{N}_{ch}/d\eta$ from [17] and the numbers of wounded nucleons from our Monte Carlo simulation of $d$+Au collisions at $\sqrt{s}=200\text{GeV}$. Each wounded nucleon emits particles according to a negative binomial distribution with $k=1$ and $\langle n\rangle =5$.

Figure 2

The wounded quark emission functions in different centrality bins extracted from the wounded quark model using $d{N}_{ch}/d\eta$ from [17] and the numbers of wounded quarks from our Monte Carlo simulation of $d$+Au collisions at $\sqrt{s}=200\text{GeV}$. Each wounded quark emits particles according to a negative binomial distribution with $k_q=1/1.3$ and $\langle n_q\rangle =5/1.3$.

Figure 3

The antisymmetrized wounded quark emission functions, $F\left(\eta \right)-F(-\eta )$, for different centrality bins, as extracted from $d$+Au collisions at $\sqrt{s}=200\text{GeV}$.

Figure 4

$d{N}_{ch}/d\eta$ predicted for $p$+Au collisions at $\sqrt{s}=200$ GeV in the wounded quark model.

Figure 5

$d{N}_{ch}/d\eta$ predicted for ${}^3\mathrm{He}$+Au collisions at $\sqrt{s}=200$ GeV in the wounded quark model.