2009

What have we learned from Monte Carlo models?

HIJING

Mohammed Aish

Physics department

Menoufia university

Egypt

Supervised by

Oleg Vasilevich Rogachevsky

Introduction.

Quark-Gluon Plasma - Phase Diagrame.

Monte Carlo Calculation in case of Heavy ion

collision- HIJING Model.

Results from HIJING.

Conclusion.

Feature of the future.

Outlines

Aim Of The Work

• Study of Au-Au collision at high energy

• Learn about the strong interaction

– Study V2 and Elliptical flow

– Using HIJING Monte Carlo Model

Au Au

HiggsHiggsBosonBosonHiggsHiggsBoson?Boson?

For

ceF

o rce

Car

rier

sC

arr i

ers

ZZ boson

WW boson

photon

ggluon

Generations of Generations of matter matter

tau

-neutrino

bbottom

ttop

III III

muon

-neutrino

sstrange

ccharm

II II

eelectron

ee-neutrino

ddown

upu

I I

Lep

tons

L

epto

ns

Qua

rks

Qua

rks

Gravity Gravity

--the the

ghost at ghost at the the

feast feast

BOSONS

Gravitino0W W Z Photino GluinoFERMIONS

QuarkQuark--GluonGluon PlasmaPlasma Phase DiagramePhase Diagrame

QGP is thought to have existed ten millionths of second after the Big Bang; creating the primordial matter of universe in the laboratory, Little Bang.

High-energy nuclear collisions will compress and heat the heavy nuclei so much that their individual protons and neutrons overlap and lots of pions arise, creating the Quark-Gluon Plasma (QGP)

Quark-Gluon PlasmaQuark-Gluon Plasma

Phase Diagram of Nuclear Matter

SPS

AGS

RHIC

150 MeV

LHC

Center of mass energies:for different acceleratorsAGS: √s ~ 5 GeVSPS : √s ~ 17 GeVRHIC: √s ~ 200 GeV LHC: √s ~ 5500 GeV

q

qqq

q

qq q q

q

q

qq

q

qqq

qq

q

q q

hadrons quarks and gluons hadrons

Monte Carlo Calculations in Monte Carlo Calculations in case of Heavy ion collisioncase of Heavy ion collision

HIJING ModelHIJING Model

Can surprise you! Can surprise you! WhyWhy??

Today's Monte Carlo models

Monte Carlo models:

• HIJING• PYTHIA/FRITIOF• NEXUS, VENUS• DPM

Assumption of HIJING Model

• HIJING Model: Heavy ion Jet international Generator Model.

• Glauber MC Model: Glauber theory is based on the assumptions of

• 1- A characteristic nucleon-nucleon (nn) cross section

• 2-Straight line trajectories of the colliding nucleons

V2 Number of Charged HIJING Model for Au+Au

collision at 60 GeV/n

V2 Number of Charged HIJING Model for Au+Au collision at 130 GeV/n

HIJING Model for Au+Au collision at 60 GeV/n

HIJING Model for Au+Au collision at 130 GeV/n

• V2 Elliptical flow, Rabidity Distribution, Npart and Ncoll predicted by the HIJING Monte Carlo for Au+Au and D+Au collision calculated.

ConclusionConclusion

Comparison between HIJING Monte

Carlo calculation and CERN data can be done.

Feature of the futureFeature of the future