Физика столкновений ультрарелятивистских ядер (экспериментальные закономерности). Коротких В.Л. - 40 стр.

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МГУ | Москва

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(GeV/c)
T
p
0 1 2 3 4 5 6 7 8 9 10
R
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
=200 GeV
NN
s
neutral pions
- dAu min. bias (PbGl)
dA
R
- dAu min. bias (PbSc)
dA
R
- AuAu 0-10% central
AA
R
R
AA
d
0 2 4 6 8 10 12
Ratios
-1
10
1
+
π(a)p/
0-12% Au+Au
60-80% Au+Au
d+Au
0 2 4 6 8 10 12
-
π/p
(b)
)
-
π+
+
π)/(p:(p+
-
e
+
e
Hwa:Recombination
Fries:Coalescence+Jet
)
-
π+
+
π)/(p:(p+
-
e
+
e
Hwa:Recombination
Fries:Coalescence+Jet
(GeV/c)
T
Transverse Momentum p
R
barion
AA
/R
meson
AA
p/π
+
¯p/π
−
                        2
                  R
                                        RdA - dAu min. bias (PbGl)
                      1.8                                                        sNN=200 GeV
                                        RdA - dAu min. bias (PbSc)
                      1.6               RAA - AuAu 0-10% central
                      1.4
                      1.2
                        1
                      0.8
                      0.6                           neutral pions

                      0.4
                      0.2
                        0
                            0       1       2       3    4        5      6       7       8      9 10
                                                                                             pT (GeV/c)

èñ. 17: Îòíîøåíèå RAA , ïîëó÷åííîå íà óñòàíîâêå PHENIX (RHIC) äëÿ dAu-
è AuAu-ñòîëêíîâåíèé.




                  (a)p/π+                   0-12% Au+Au               (b)p/ π-           e + e -:(p+ p)/( π + +π -)
                                            60-80% Au+Au                                 Hwa:Recombination
                                            d+Au                                         Fries:Coalescence+Jet
              1
     Ratios




        10-1


                  0   2         4       6       8       10    12 0           2       4       6    8      10     12
                            Transverse Momentum pT (GeV/c)

èñ. 18: Îòíîøåíèå RAA
                    barion /Rmeson [78℄ âûõîäà àäðîíîâ p/π + (a) è p̄/π − (b).
                             AA




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