HIGH ENERGY NUCLEAR PHYSICS (Relativistic heavy ion collisions)

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Presentation transcript:

HIGH ENERGY NUCLEAR PHYSICS (Relativistic heavy ion collisions) wan ahmad tajuddin wan abdullah jabatan fizik universiti malaya national centre for particle physics December 2014

And it is He who created the heavens and the earth in six days - and His Throne had been upon water - that He might test you as to which of you is best in deed. But if you say, "Indeed, you are resurrected after death," those who disbelieve will surely say, "This is not but obvious magic."

@ LHC, CERN

Hot dense nuclear matter Quark-gluon plasma Hot dense nuclear matter

SPS @ CERN 17 GeV/ nucleon Pb LBL 1-2 GeV/ nucleon JINR 6 GeV/ nucleon AGS @ BNL RHIC @ BNL 200 GeV/ nucleon pair Cu, Au, U LHC @ CERN 2.76 TeV/ nucleon pair Pb

why condition in first microseconds in hot Big Bang

arXiv:11404.3294

Elementary particles and fields

hadrons

quantum chromodynamics

why QCD state at high temperatures

why Hadronization (~ confinement)

regime Typical temperature range – T = 300 MeV/k = 3.3 x 1012 K 10,000 x greater than in center of Sun Corresponding energy density – e =10 GeV/ fm3 Corresponding relativistic matter pressure – P ≈ e/3 = 0.52 x 1031 bar

Strangeness enhancement high temperature → strangeness enhanced Statistics: particle ratios → Tch , mB at chemical freezeout Experimental: 160 MeV < Tch < 180 MeV cf. expected QCD phase transition value ~170 MeV (lattice QCD calculations)

Heavy quarkonium suppression hot and deconfined medium – quarkonia (cf naked flavours) expected to “melt”

Jet quenching images courtesy CERN coloured particles damped in coloured media

Elliptic flow Collective anisotropy thermalization, hydrodynamics liquid-like

Colour glass condensate BFKL dynamics – saturation at Q2s ~ <Npart>/2 expect nch/A ~ 1/as(Q2s)

Collective effects Ridges – final state correlations

conclusions Quark-gluon plasma – perfect fluid Final state correlations? Many more new and interesting things in physics related to the nucleus

Thank you