Advances in High Energy Physics

Research Article

On Pseudorapidity Distribution and Speed of Sound in High Energy Heavy Ion Collisions Based on a New Revised Landau Hydrodynamic Model

Table 1

Values of peak position and contribution ratio of the target source, the rapidity distribution width of the central source, and   for the curves in Figures 1–4 which show Au-Au collisions for different energies and centralities. For the symmetric collisions, the peak position and contribution ratio of the projectile source and the peak position and contribution ratio of the central source can be given by , , , and , respectively. The last two columns show the values of square speed of sound for the target or projectile and central sources , respectively.
FigureBin (%)
19.6 GeV
Figure 1(a)0–3−1.20 ± 0.250.03 ± 0.011.60 ± 0.080.4130.130 ± 0.0280.357 ± 0.028
Figure 1(b)3–6−1.10 ± 0.250.02 ± 0.011.65 ± 0.080.6030.130 ± 0.0280.374 ± 0.027
Figure 1(c)6–10−1.10 ± 0.250.02 ± 0.011.70 ± 0.080.1980.130 ± 0.0280.391 ± 0.027
Figure 1(d)10–15−1.00 ± 0.250.02 ± 0.011.75 ± 0.080.3250.130 ± 0.0280.408 ± 0.027
Figure 1(e)15–20−1.07 ± 0.200.01 ± 0.011.80 ± 0.080.9840.130 ± 0.0280.424 ± 0.026
Figure 1(f)20–25−1.02 ± 0.200.01 ± 0.011.85 ± 0.102.7090.130 ± 0.0280.441 ± 0.032
Figure 1(g)25–30−1.00 ± 0.200.01 ± 0.011.85 ± 0.106.5060.130 ± 0.0280.441 ± 0.032
Figure 1(h)30–35−1.00 ± 0.180.01 ± 0.011.90 ± 0.108.7640.130 ± 0.0280.456 ± 0.032
Figure 1(i)35–40−1.04 ± 0.200.02 ± 0.021.90 ± 0.0611.5310.130 ± 0.0280.457 ± 0.019
Figure 1(j)40–45−1.00 ± 0.200.01 ± 0.012.00 ± 0.109.6900.130 ± 0.0280.487 ± 0.030
62.4 GeV
Figure 2(a)0–3−1.70 ± 0.210.04 ± 0.012.00 ± 0.090.4110.088 ± 0.0190.370 ± 0.025
Figure 2(b)3–6−1.70 ± 0.210.04 ± 0.012.00 ± 0.090.7880.088 ± 0.0190.370 ± 0.025
Figure 2(c)6–10−1.60 ± 0.200.04 ± 0.012.00 ± 0.100.5220.088 ± 0.0190.370 ± 0.028
Figure 2(d)10–15−1.60 ± 0.200.04 ± 0.012.10 ± 0.090.2160.088 ± 0.0190.397 ± 0.025
Figure 2(e)15–20−1.80 ± 0.200.04 ± 0.012.15 ± 0.110.2470.088 ± 0.0190.411 ± 0.030
Figure 2(f)20–25−1.80 ± 0.190.03 ± 0.012.25 ± 0.100.0770.088 ± 0.0190.438 ± 0.026
Figure 2(g)25–30−1.70 ± 0.200.03 ± 0.012.30 ± 0.110.1170.088 ± 0.0190.451 ± 0.029
Figure 2(h)30–35−1.60 ± 0.290.02 ± 0.012.40 ± 0.100.0900.088 ± 0.0190.476 ± 0.025
Figure 2(i)35–40−1.60 ± 0.300.01 ± 0.012.50 ± 0.090.1160.088 ± 0.0190.501 ± 0.022
Figure 2(j)40–45−1.60 ± 0.280.01 ± 0.012.55 ± 0.120.1780.088 ± 0.0190.513 ± 0.026
Figure 2(k)45–50−1.70 ± 0.200.01 ± 0.012.55 ± 0.120.2080.088 ± 0.0190.513 ± 0.028
130 GeV
Figure 3(a)0–3−1.90 ± 0.280.04 ± 0.022.30 ± 0.100.5330.073 ± 0.0160.395 ± 0.025
Figure 3(b)3–6−1.90 ± 0.300.04 ± 0.022.30 ± 0.090.4230.073 ± 0.0160.395 ± 0.023
Figure 3(c)6–10−2.00 ± 0.290.04 ± 0.012.33 ± 0.090.3090.073 ± 0.0160.402 ± 0.022
Figure 3(d)10–15−2.00 ± 0.300.04 ± 0.012.40 ± 0.070.1930.073 ± 0.0160.420 ± 0.017
Figure 3(e)15–20−2.10 ± 0.350.04 ± 0.012.40 ± 0.100.0840.073 ± 0.0160.420 ± 0.024
Figure 3(f)20–25−2.10 ± 0.350.04 ± 0.012.40 ± 0.110.1170.073 ± 0.0160.420 ± 0.027
Figure 3(g)25–30−2.10 ± 0.320.03 ± 0.012.50 ± 0.100.1280.073 ± 0.0160.444 ± 0.024
Figure 3(h)30–35−2.15 ± 0.330.03 ± 0.012.55 ± 0.100.1040.073 ± 0.0160.456 ± 0.023
Figure 3(i)35–40−2.15 ± 0.300.03 ± 0.012.60 ± 0.100.0570.073 ± 0.0160.467 ± 0.023
Figure 3(j)40–45−2.15 ± 0.300.02 ± 0.012.70 ± 0.100.2370.073 ± 0.0160.490 ± 0.022
Figure 3(k)45–50−2.15 ± 0.300.02 ± 0.012.70 ± 0.120.0960.073 ± 0.0160.490 ± 0.027
200 GeV
Figure 4(a)0–3−2.00 ± 0.380.04 ± 0.012.40 ± 0.120.2760.066 ± 0.0140.392 ± 0.029
Figure 4(b)3–6−2.00 ± 0.490.04 ± 0.012.40 ± 0.130.2510.066 ± 0.0140.392 ± 0.031
Figure 4(c)6–10−2.00 ± 0.490.03 ± 0.012.50 ± 0.150.2140.066 ± 0.0140.415 ± 0.035
Figure 4(d)10–15−2.10 ± 0.420.03 ± 0.012.60 ± 0.150.1440.066 ± 0.0140.438 ± 0.034
Figure 4(e)15–20−2.10 ± 0.480.03 ± 0.012.60 ± 0.130.0820.066 ± 0.0140.438 ± 0.030
Figure 4(f)20–25−2.10 ± 0.480.03 ± 0.012.60 ± 0.150.1080.066 ± 0.0140.438 ± 0.034
Figure 4(g)25–30−2.10 ± 0.480.03 ± 0.012.70 ± 0.110.1490.066 ± 0.0140.461 ± 0.024
Figure 4(h)30–35−2.10 ± 0.500.03 ± 0.012.70 ± 0.150.0960.066 ± 0.0140.461 ± 0.033
Figure 4(i)35–40−2.10 ± 0.530.03 ± 0.012.70 ± 0.150.1410.066 ± 0.0140.461 ± 0.033
Figure 4(j)40–45−2.10 ± 0.500.03 ± 0.012.70 ± 0.150.1880.066 ± 0.0140.461 ± 0.033
Figure 4(k)45–50−2.10 ± 0.500.03 ± 0.012.80 ± 0.130.1190.066 ± 0.0140.483 ± 0.028