1. 1 General characteristics of AA collisions at 35 AGeV Yuri Kharlov, Serguei Sadovsky IHEP, Protvino LINC-2005, 5 October 2005

2. 5 October 2005LINC-20052 Models of ion collisions at middle energies RQMD RQMD Relativistic Quantum Molecular Dynamics Relativistic Quantum Molecular Dynamics Microscopic model of heavy ion reactions treating high nuclear resonances, string formation, strangeness production Microscopic model of heavy ion reactions treating high nuclear resonances, string formation, strangeness production Applicable from 1 AGeV to TeV domain Applicable from 1 AGeV to TeV domain http://www.th.physik.uni-frankfurt.de/~mhofmann/rqmd.html http://www.th.physik.uni-frankfurt.de/~mhofmann/rqmd.html http://www.th.physik.uni-frankfurt.de/~mhofmann/rqmd.html UrQMD UrQMD Ultra Relativistic Quantum Molecular Dynamics, successor of QMD Ultra Relativistic Quantum Molecular Dynamics, successor of QMD Microscopic transport model in terms of interactions between known hadrons and resonances at  s<5 GeV Microscopic transport model in terms of interactions between known hadrons and resonances at  s<5 GeV Excitation of color strings and their fragmentation into hadrons at  s>5 GeV Excitation of color strings and their fragmentation into hadrons at  s>5 GeV Only central (b=0 fm) events are studied to determine the hardest detector load Only central (b=0 fm) events are studied to determine the hardest detector load http://www.th.physik.uni-frankfurt.de/~urqmd/ http://www.th.physik.uni-frankfurt.de/~urqmd/ http://www.th.physik.uni-frankfurt.de/~urqmd/ Pluto Pluto Lepton pair production in ion collisions Lepton pair production in ion collisions Vector mesons are emitted from the fireball with fixed temperature (T=170 MeV is used) Vector mesons are emitted from the fireball with fixed temperature (T=170 MeV is used) http://www-hades.gsi.de/computing/pluto/html/PlutoIndex.html http://www-hades.gsi.de/computing/pluto/html/PlutoIndex.html http://www-hades.gsi.de/computing/pluto/html/PlutoIndex.html Fritiof Fritiof Lund string model for hadron and nucleus collisions Lund string model for hadron and nucleus collisions Not supposed to be applicable at  s<10 GeV (a little beyond U70) Not supposed to be applicable at  s<10 GeV (a little beyond U70) http://wwwasdoc.web.cern.ch/wwwasdoc/psdir/fritiof.ps.gz http://wwwasdoc.web.cern.ch/wwwasdoc/psdir/fritiof.ps.gz http://wwwasdoc.web.cern.ch/wwwasdoc/psdir/fritiof.ps.gz

3. 5 October 2005LINC-20053 UrQMD C+Pb event at p beam =35 AGeV/c

4. 5 October 2005LINC-20054 p T distrbutions: pions (  +,  -,  0 ) Collision Total multiplicity Multiplicity p T >0.1 GeV.c  C+Pb10287  C+C2925  d+C76

5. 5 October 2005LINC-20055 p T distrbutions: charged kaons Collision Total multiplicity Multiplicity p T >0.1 GeV.c  C+Pb K + : 5.2, K - : 1.9 K + : 4.9, K - : 1.8  C+C K + : 1.2, K - : 0.6  d+C K + : 0.2, K - : 0.11 K + : 0.2, K - : 0.10

6. 5 October 2005LINC-20056 p T distrbutions: neutral kaons Collision Total multiplicity Multiplicity p T >0.1 GeV.c  C+Pb K 0 L : 3.6, K 0 S : 3.5 K 0 L : 3.4, K 0 S : 3.2  C+C K 0 L : 0.9, K 0 S : 0.9  d+C K 0 L : 0.2, K 0 S : 0.2

7. 5 October 2005LINC-20057 p T distrbutions: nucleons Collision Total multiplicity Multiplicity p T >0.1 GeV.c  C+Pb p: 91, n: 122 p: 80, n: 107  C+C p: 11, n: 11 p:10, n: 10  d+C p: 7, n: 7 p: 5, n: 5

8. 5 October 2005LINC-20058 p T distrbutions: anti-nucleons Collision Total multiplicity Multiplicity p T >0.1 GeV.c  C+Pb p-bar: 0.11, n-bar: 0.12 p-bar: 0.10, n-bar: 0.12  C+C p-bar: 0.06, n-bar: 0.07  d+C p-bar: 0.02, n-bar: 0.02 p-bar: 0.02, n: 0.02

9. 5 October 2005LINC-20059 Rapidity distrbutions: pions

10. 5 October 2005LINC-200510 Rapidity distrbutions: charged kaons

11. 5 October 2005LINC-200511 Rapidity distrbutions: neutral kaons

12. 5 October 2005LINC-200512 Rapidity distrbutions: nucleons

13. 5 October 2005LINC-200513 Rapidity distrbutions: anti-nucleons

14. 5 October 2005LINC-200514 Theta distrbutions: pions collisionMultiplicity 5  <  <20   C+Pb33  C+C12  d+C3

15. 5 October 2005LINC-200515 Theta distrbutions: charged kaons collisionMultiplicity 5  <  <20   C+Pb K + : 2.2, K - : 0.9  C+C K + : 0.5, K - : 0.3  d+C K + : 0.10, K-: 0.05

16. 5 October 2005LINC-200516 Theta distrbutions: neutral kaons collisionMultiplicity 5  <  <20   C+Pb K 0 L : 1.5, K 0 S : 1.4  C+C K 0 L : 0.4, K 0 S : 0.4  d+C K 0 L : 0.10, K 0 S : 0.08

17. 5 October 2005LINC-200517 Theta distrbutions: nucleons collisionMultiplicity 5  <  <20   C+Pb p: 11, n: 13  C+C p: 2, n: 2  d+C p: 0.7, n: 0.7

18. 5 October 2005LINC-200518 Theta distrbutions: anti-nucleons collisionMultiplicity 5  <  <20   C+Pb p-bar: 0.04, n-bar: 0.05  C+C p-bar: 0.03, n-bar: 0.03  d+C p-bar: 0.01, n-bar: 0.01

19. 5 October 2005LINC-200519 Vector mesons  e + e - Pluto emits vector mesons from the fireball at T=170 MeV, produced in ion collision at p beam =35 AGeV   0    J/ 

20. 5 October 2005LINC-200520 Summary Available event generators allow to estimate the detector load by secondary particles. Available event generators allow to estimate the detector load by secondary particles. In the most heavy ion collisions achievable at U70, C+Pb, one expects to detect up to 50 particles per one central event. In the most heavy ion collisions achievable at U70, C+Pb, one expects to detect up to 50 particles per one central event. Centrality (impact parameters) can be measured in the target fragmentation region, mainly for heavy targets (Pb). Centrality (impact parameters) can be measured in the target fragmentation region, mainly for heavy targets (Pb).