Физика столкновений ультрарелятивистских ядер (экспериментальные закономерности). Коротких В.Л. - 32 стр.

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ǫ
v
2
(η =
0)
1/S dN
ch
/dy
)
-2
(fmη/d
ch
) dN
T
(1/A
0 5 10 15 20 25 30
part
ε/
2
v
0.04
0.1
0.2
0.3
0.4
hydro limit (QGP-EoS)
hydro limit (H-EoS)
STAR AuAu-200 GeV
PHOBOS AuAu-200 GeV
STAR AuAu-130 GeV
STAR AuAu-62.4 GeV
STAR CuCu-200 GeV
PHOBOS CuCu-200 GeV
STAR CuCu-62.4 GeV
PHOBOS CuCu-62.4 GeV
NA49 AuAu-17.3 GeV
NA49 AuAu-8.8 GeV
BNL-E877 -5.0 GeV
v
2
(η = 0) 1/S dN
ch
/dy
v
2
v
2
ñòè äâóõ ÿäåð è ïðîñòðàíñòâåííîãî ýêñöåíòðèñèòåòà ǫ ýòîé ïî-
âåðõíîñòè. C ýòèìè ïåðåìåííûìè äàííûå îá îòíîøåíèè v2 (η =
0)/ǫ îò AGS ê RHIC ïîêàçûâàþò óíèâåðñàëüíóþ ëèíåéíóþ çà-
âèñèìîñòü îò 1/S dN ch /dy (ðèñ. 13).
                    0.4
        v2/ εpart




                                         hydro limit (QGP-EoS)
                    0.3                  hydro limit (H-EoS)



                    0.2



                                                               STAR AuAu-200 GeV
                                                               PHOBOS AuAu-200 GeV
                    0.1                                        STAR AuAu-130 GeV
                                                               STAR AuAu-62.4 GeV

                                                               STAR CuCu-200 GeV
                                  NA49 AuAu-17.3 GeV           PHOBOS CuCu-200 GeV
                                  NA49 AuAu-8.8 GeV            STAR CuCu-62.4 GeV
                                  BNL-E877 -5.0 GeV            PHOBOS CuCu-62.4 GeV


               0.04
                          0   5   10         15          20            25       30
                                                                (1/A ) dN /dη (fm-2)
                                                                    T    ch


èñ. 13: Çàâèñèìîñòü îòíîøåíèÿ ýëëèïòè÷åñêîãî ïîòîêà ê íà÷àëüíîìó çíà÷åíèþ
ýêñöåíòðèñèòåòà v2 (η = 0)/ǫ îò 1/S dN ch /dy .



   Ïðè îïèñàíèè ðîæäåííîé ïðè ñòîëêíîâåíèè òÿæåëûõ èîíîâ
ÊÕÄ ìàòåðèè â òåðìèíàõ èäåàëüíîé æèäêîñòè âûÿñíèëîñü, ÷òî
ýòà ëèíåéíàÿ çàâèñèìîñòü âûïîëàæèâàåòñÿ ïðè ýíåðãèÿõ RHIC.
Òàêèì îáðàçîì, çäåñü òàê æå, êàê è äëÿ äðóãèõ êëàññîâ èçìå-
ðåíèé, íàèâíàÿ ýêñòðàïîëÿöèÿ ýòèõ äàííûõ îò RHIC ê LHC
íå áóäåò ñîîòâåòñòâîâàòü äèíàìè÷åñêîé ìîäåëè ðàñøèðÿþùåéñÿ
æèäêîñòè, ïðåäíàçíà÷àåìîé äëÿ îïèñàíèÿ ýëëèïòè÷åñêîãî ïî-
òîêà v2 . Ñ äðóãîé ñòîðîíû, ñóùåñòâóþò ìîäåëè, êîòîðûå ìîãóò
îáúÿñíèòü äàëüíåéøèé ðîñò v2 /ǫ çà ñ÷åò íåðàâíîâåñíûõ ÿâëå-
íèé â íà÷àëüíîì ñîñòîÿíèè [47℄ èëè çà ñ÷åò èçìåíåíèÿ îòíî-
ñèòåëüíîãî âêëàäà àäðîííûõ è ïàðòîííûõ ïåðåðàññåÿíèé [57℄,

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