V. Greco V. Greco Universita’ di Catania, Italy INFN-LNS Zimanyi 75 Memorial , July 2007 – Budapest Zimanyi 75 Memorial , July 2007 – Budapest (Hungary) (Hungary) Light and heavy quark Light and heavy quark coalescence coalescence In Heavy-ion collisions In Heavy-ion collisions ? Work done in collaboration with Van Hees, Ko, Levai, Rapp
Light and heavy quark coalescence In Heavy-ion collisions. V. Greco Universita’ di Catania, Italy INFN-LNS. ?. Work done in collaboration with Van Hees, Ko, Levai, Rapp. Zimanyi 75 Memorial , July 2007 – Budapest (Hungary). First proceedings on QGP I looked at…. Before instead - PowerPoint PPT Presentation
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V. GrecoV. GrecoUniversita’ di Catania, ItalyINFN-LNS
Zimanyi 75 Memorial , July 2007 – Budapest (Hungary)Zimanyi 75 Memorial , July 2007 – Budapest (Hungary)
Light and heavy quark Light and heavy quark
coalescencecoalescence
In Heavy-ion collisionsIn Heavy-ion collisions
?
Work done in collaboration withVan Hees, Ko, Levai, Rapp
First proceedings on QGP First proceedings on QGP
I looked at… I looked at…
“In the ALCOR model we assume that just before the hadronization the dense matter can be described as a mixture of dressed up, massive quarks and antiquarks. The effetive mass of the gluons at this point is much larger than that of the quarks [9], consequently the gluon fission into quark-antiquark pairs is enhanced and massive gluons disappear from the mixture.”
[9] Heinz & Levai, PRC57
Before instead Before instead
I was working on RMFTI was working on RMFT
From RHIC to LHC (new QGP phase)?! Similar RAA & v2 proof of Qq resonances in the RHIC-
QGP
presence of heavy-light Qq resonances (lQCD) Heavy quark thermalization RAA –v2 correlation of single e
Q value effect in a Boltzmann approach (Ravagli-Rapp, arXiv:0705.0021 [hep-ph] )
Greco-Ko-Levai, PRC68
40804800 HADQGP SS
SSEE // ZTT
ES log
1
But, the energy is not conserved !
15% violation, No factor 2 :- resonances- mass of the particle- degeneracies
About Energy & Entropy …
Dynamical coalescence with interaction effects
can conserve the entropy …
Entropy- Energy ConservationEntropy- Energy Conservation
1) Dynamical coalescence (no sudden f.o. - Molnar-QM05)
2)Where is confinement ?
V(r,T) (beyond sudden approx.) especially for heavy quarks -
lQCD
3) How to go from thermal to chiral masses? Although thermal quark mass does not breal chiral Symmetry and similar magnitude
of both quantities near Tc may facilitate the formation of hadrons from 2- and
3-quark clusters ( Heinz and Levai, PRC57).
4) Quasiparticle with spectral function quark mass distribution (Zimanyi-Birò-Levai, JPG31 (05) 771) good p,specra and ratio
Deeper questions… and difficult answersDeeper questions… and difficult answers
Take home messages from the light sectorTake home messages from the light sector
Hadronization from 2-3 body phase SPACE (pT< 5-6 GeV):
dense medium decrease vacuum role massive quarks close in phase space
hadrons at pt comes from quarks pt/n (change of soft scale)
Universal elliptic flow (dynamical quarks “visible”): carried by quarks enhanced by coalescence
What happens What happens
to heavy quarks?to heavy quarks?
Fries, Greco, Lacey, Sorensen - Ann. Rev. Part. Sci. (2008)
Some years ago…
V2q from , p,
v2D 5% no c interactionbut
V2 of electrons
Greco-Ko-Rapp, PLB595 (04) 202
S. Kelly,QM04
Flow mass effect
N. Armesto et al., PLB637(2006)362S. Wicks et al.,nucl-th/07010631(QM06)
lQCD resonant (bound) states persistlQCD resonant (bound) states persistfor QQ and qq -> Qq (D-like) resonant scatteringfor QQ and qq -> Qq (D-like) resonant scattering
lQCD resonant (bound) states persistlQCD resonant (bound) states persistfor QQ and qq -> Qq (D-like) resonant scatteringfor QQ and qq -> Qq (D-like) resonant scattering
RRAA AA , v, v22 of single e -pQCD of single e -pQCD
Radiative energy loss not sufficient
sQGP: non perturbative effect q
q
A() 2()Asakawa
J/
J/ (p 0) disappearsbetween 1.62Tc and 1.70Tc
“Light”-Quark Resonances
1.4Tc
[Asakawa+ Hatsuda ’03]
Spectral function in lQCDSpectral function in lQCD
Similar from Potential model for J/
Mannarelli, Rapp - PRC72 (Bruckner-like)
Alberico, Beraudo, De Pace - PRD 72 & 75
Petrecsky,Mocsy,Wong….
t eq down to 5 fm/c at RHIC ! t eq down to 5 fm/c at RHIC !
Open-Charm Resonances in QGP
• effective model with pseudo/scalar + axial/vector “D-like” mesons [chiral + HQ symmetry]
• cross section ISOTROPICISOTROPIC • more microscopic from lQCD potential+many-body [Mannarelli et al.,in preparation] Ok, but can it describe ROk, but can it describe RAAAA and v and v22??Ok, but can it describe ROk, but can it describe RAAAA and v and v22??
with dimensional regularizationor form factors
55 ,,,1
h.c.2
)v1(
cqG DDDcq L
The modelThe model
Hard productionHard production
PYTHIA (PDF’s + pQCD )
HQ scattering in QGPHQ scattering in QGPLangevin simulation