Baryon number and charge fluctuations from lattice QCD

Schmidt C (2013)
In: Nuclear Physics A. Nuclear Physics A, 904-905. Elsevier BV: 865c-868c.

Konferenzbeitrag | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
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 Nτ=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. 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.
Erscheinungsjahr
2013
Titel des Konferenzbandes
Nuclear Physics A
Serien- oder Zeitschriftentitel
Nuclear Physics A
Band
904-905
Seite(n)
865c-868c
ISSN
03759474
Page URI
https://pub.uni-bielefeld.de/record/2606330

Zitieren

Schmidt C. Baryon number and charge fluctuations from lattice QCD. In: Nuclear Physics A. Nuclear Physics A. Vol 904-905. Elsevier BV; 2013: 865c-868c.
Schmidt, C. (2013). Baryon number and charge fluctuations from lattice QCD. Nuclear Physics A, Nuclear Physics A, 904-905, 865c-868c. Elsevier BV. doi:10.1016/j.nuclphysa.2013.02.152
Schmidt, Christian. 2013. “Baryon number and charge fluctuations from lattice QCD”. In Nuclear Physics A, 904-905:865c-868c. Nuclear Physics A. Elsevier BV.
Schmidt, C. (2013). “Baryon number and charge fluctuations from lattice QCD” in Nuclear Physics A Nuclear Physics A, vol. 904-905, (Elsevier BV), 865c-868c.
Schmidt, C., 2013. Baryon number and charge fluctuations from lattice QCD. In Nuclear Physics A. Nuclear Physics A. no.904-905 Elsevier BV, pp. 865c-868c.
C. Schmidt, “Baryon number and charge fluctuations from lattice QCD”, Nuclear Physics A, Nuclear Physics A, vol. 904-905, Elsevier BV, 2013, pp.865c-868c.
Schmidt, C.: Baryon number and charge fluctuations from lattice QCD. Nuclear Physics A. Nuclear Physics A. 904-905, p. 865c-868c. Elsevier BV (2013).
Schmidt, Christian. “Baryon number and charge fluctuations from lattice QCD”. Nuclear Physics A. Elsevier BV, 2013.Vol. 904-905. Nuclear Physics A. 865c-868c.
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