Large rapidity (y~3.2) data analysis from 200 GeV/c

AuAu and pp runs

Radoslaw KarabowiczHot Matter Physics Department

M. Smoluchowski Insititue of Physics

Jagiellonian University, Krakow

SPECTRA CHALLENGE

SPECTRA CHALLENGE cont’d

SPECTRA CHALLENGE cont’d

I am definiately overpredictingdata at lower pt

SPECTRA CHALLENGE cont’d

After properly initiliazingRICH I’m going down atlow pt’s

Comparison with Ramiro’s

spectra (pp 200GeV/c)

This is very similar to this plot - suggests problems with acceptance maps (I generate my own different acc.maps)

… -> but recently I was furiously cleaning my directory and deleted (without cvs’ing) my acceptance maps generator. I have old version but it’s not compiling… yet

Comparison with Ramiro’s

spectra (pp 200GeV/c)

But anyways, the comparison with Ramiro’s spectra is relatively good – at least for pions

pT spectra at large y (from AuAu and pp at 200 GeV/c)

2deg settingnot correctedfor efficiency

Antiparticle-to-particle ratio

AuAu pp

Proton and kaon to pion spectra

proton kaon

Nuclear Modification Factors

pions at y ~ 3.2

kaons at y ~ 3.1

protons at y ~ 3.1

Hirano Nara Phys.Rev. C 68, 064902

pT spectra at various y - AuAu

Spectra at various rapidities show stable behaviour of the spectra with rapidity

pT spectra at various y - pp

Spectra at various rapidities show stable behaviour of the spectra with rapidity

RAA at various rapidities

Nuclear Modification Factors

pions at y ~ 3.0

kaons at y ~ 3.0

protons at y ~ 3.0

pions at y ~ 3.1

kaons at y ~ 3.1

protons at y ~ 3.1

Nuclear Modification Factors

pions at y ~ 3.2

kaons at y ~ 3.2

protons at y ~ 3.2

Nuclear Modification Factors

pions at y ~ 3.3

kaons at y ~ 3.3

protons at y ~ 3.3

Nuclear Modification Factors

pions at y ~ 3.4

kaons at y ~ 3.4

protons at y ~ 3.4

Nuclear Modification Factors

pions at y ~ 3.5

kaons at y ~ 3.5

protons at y ~ 3.5

Nuclear Modification Factors

pions at y ~ 3.7

kaons at y ~ 3.6

protons at y ~ 3.6

Nuclear Modification Factors

RAA at various centralities

pions at y ~ 3.2

kaons at y ~ 3.1

protons at y ~ 3.1

RAA vs Npart

RAA versus dN/dand energy density

conclusions

• Basicly no rapidity depedence of Raa (just like in QM05)

• Strong centrality dependence of Raa for all particles, stronger than that seen at midrapidity (just like in QM05)

• Although models predict Raa raising at forward rapidities no such behavoiur is seen in my data, BUT pt region is not enough to make very strong conclusions

• As to data consistency - I am overpredicting spectra at lower pt's