Baryon number and charge fluctuations from lattice QCD - INSPIRE

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Baryon number and charge fluctuations from lattice QCD

BNL-Bielefeld

Collaboration

•

Christian Schmidt
(
- Bielefeld U.
)

for the collaboration.

Dec, 2012

4 pages

Part of Proceedings, 23rd International Conference on Ultrarelativistic Nucleus-Nucleus Collisions : Quark Matter 2012 (QM 2012) : Washington, DC, USA, August 13-18, 2012, 865c-868c

Published in:

Nucl.Phys.A 904-905 (2013) 865c-868c

Contribution to:

- Quark Matter 2012
, 865c-868c

e-Print:

1212.4278 [hep-lat]

DOI:

10.1016/j.nuclphysa.2013.02.152

View in:

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Abstract: (Elsevier)

We calculate electric and baryonic charge fluctuations on the lattice. Results have been obtained with the highly improved staggered quark action (HISQ) and almost physical quark masses on lattices with spacial extent of N_@t=6,8,12. Higher order cumulants of the net-charge distributions are increasingly dominated by a universal scaling behavior, which is arising due to a critical point of QCD in the chiral limit. Considering cumulants up to the sixth order, we observe that they generically behave as expected from universal scaling laws, which is quite different from the cumulants calculated within the hadron resonance gas model. Taking ratios of these cumulants, we obtain volume independent results that can be compared to the experimental measurements. Such a comparison will unambiguously relate the QCD transition temperature that has been determined on the lattice with the freeze out temperature of heavy ion collision at LHC and RHIC.

Note:

4 pages, 2 figures, contribution to the proceedings of the Quark Matter 2012 International Conference, August 13-18, 2012, Washington DC, USA

charge: fluctuation
quark: staggered
quantum chromodynamics: critical phenomena
freeze-out: temperature
hadron: resonance: gas
temperature: transition
Brookhaven RHIC Coll
baryon number
CERN LHC Coll
heavy ion

References(10)

Figures(4)

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