The Evolution-Dominated Hydrodynamic Model and the Pseudorapidity Distributions in High Energy Physics

Table 1

The mean numbers of total participants 𝑁_Part and the central positions 𝑦₀ of Gaussian rapidity distribution in different centrality Au-Au and Cu-Cu collisions at √𝑠_NN=200 GeV. The numbers with and without errors are, respectively, the results given by PHOBOS Collaboration at BNL-RHIC [27] and (39).

Centrality cut (%)	0–3	3–6	6–10	10–15	15–20	20–25	25–30	30–35	35–40
𝑁Part(Au-Au)	359.44	324.50	288.74	248.96	210.98	178.24	149.78	124.92	103.22
	361±11	331±10	297±9	255±8	215±7	180±7	150±6	124±6	101±6
𝑁Part(Cu-Cu)	109.92	99.76	89.00	76.70	64.74	54.40	45.40	37.62	30.88
	108±4	101±3	91±3	79±3	67±3	57±3	48±3	40±3	33±3
𝑦0(Au-Au)	2.63	2.67	2.70	2.72	2.78	2.81	2.96	2.97	3.05
𝑦0(Cu-Cu)	2.75	2.78	2.80	2.93	2.94	2.95	2.96	2.97	3.05