Lattice QCD predictions for shapes of event distributions along the freezeout curve in heavy-ion collisions

Gavai, Rajiv V.; Gupta, Sourendu

doi:10.1016/j.physletb.2011.01.006

Cited by 151 publications

(241 citation statements)

References 32 publications

Supporting

Mentioning

230

Contrasting

Order By: Relevance

“…Furthermore, in order to get rid of not directly measurable quantities such as volume and temperature, which enter into eq. 1, it is advocated in [7] to look for ratios of cumulants. However, a comment is in order here: eq.…”

Section: Introductionmentioning

confidence: 99%

Bridging the gap between event-by-event fluctuation measurements and theory predictions in relativistic nuclear collisions

2017

View full text Add to dashboard Cite

We develop methods to deal with non-dynamical contributions to event-by-event fluctuation measurements of net-particle numbers in relativistic nuclear collisions. These contributions arise from impact parameter fluctuations and from the requirement of overall net-baryon number or net-charge conservation and may mask the dynamical fluctuations of interest, such as those due to critical endpoints in the QCD phase diagram. Within a model of independent particle sources we derive formulae for net-particle fluctuations and develop a rigorous approach to take into account contributions from participant fluctuations in realistic experimental environments and at any cumulant order. Interestingly, contributions from participant fluctuations to the second and third cumulants of net-baryon distributions are found to vanish at mid-rapidity for LHC energies while higher cumulants of even order are non-zero even when the net-baryon number at mid-rapidity is zero. At lower beam energies the effect of participant fluctuations increases and induces spurious higher moments. The necessary corrections become large and need to be carefully taken into account before comparison to theory. We also provide a procedure for selecting the optimal phase-space coverage of particles for fluctuation analyses and discuss quantitatively the necessary correction due to global charge conservation.

show abstract

Section: Introductionmentioning

confidence: 99%

Bridging the gap between event-by-event fluctuation measurements and theory predictions in relativistic nuclear collisions

2017

View full text Add to dashboard Cite

show abstract

“…It was established that certain measures of the shape of the distribution of event-to-event fluctuations of conserved quantities [1] which were predicted through lattice QCD simulations [2] agreed well with experimental observations in relativistic heavy-ion collisions [3].…”

Section: Introductionmentioning

confidence: 80%

“…(1) is written in a form which emphasizes that dimensionless functions of dimensionless numbers are the output of lattice computations. The χ ( ) ( ), which are the -th derivatives of P with respect to µ are called nonlinear susceptibilities (NLS); χ (1) is the quark number density and χ (2) the quark number susceptibility [5]. The series expansions of the NLS are obtained from Eq.…”

Section: Introductionmentioning

confidence: 99%

“…Analysis of the series expansion of χ (2) ( )/T 2 led to current estimates [6] of the position of the critical end point of QCD E = 1 8 ± 0 1 and E = 0 94 ± 0 01 (2) where the choice made in [2,6] was to use T (P) for the scale of the temperature, at which the Polyakov loop sus-ceptibility peaks. The observables for which agreement between lattice predictions and experiments are demonstrated are the ratios [1] 3 ( ) = χ (4) ( ) χ (3) ( )/T 2 ( ) = χ (4) ( ) χ (2) ( )/T 2…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Finite size scaling on the phase diagram of QCD

Gupta

2012

Open Physics

Self Cite

View full text Add to dashboard Cite

Abstract:In the last few years there has been remarkable progress in the comparison of experimental data on the shape of event-by-event distributions of conserved quantities and lattice thermodynamic predictions based on the grand canonical ensemble. In this talk we discuss how the QCD crossover temperature and the freezeout curve are extracted from the analysis of fluctuations. We report that one can also go further and locate the QCD critical point at µ 2T . We also list the systematics which must be brought under control in future.PACS (2008)

show abstract

“…Theretically, fluctuations of conserved quantities, such as net-baryon (B), net-charge (Q) and netstrangeness (S), have been long time predicted to be sensitive to the correlation length [5][6][7] and directly connected to the susceptibilities computed in the first principle Lattice QCD calculations [8,9]. Thus, it can serve as a powerful observables to study the phase transition and search for the CP in heavy-ion collisions.…”

Section: Introductionmentioning

confidence: 99%

Search for the QCD Critical Point with Fluctuations of Conserved Quantities in Relativistic Heavy-Ion Collisions at RHIC

Luo

2017

EPJ Web Conf.

View full text Add to dashboard Cite

Abstract. Fluctuations of conserved quantities are predicted to be sensitive observables to probe the QCD phase transition and critical point in heavy-ion collisions. Experimentally, various cumulants (up to fourth order) of net-proton (proxy for net-baryon (B)), net-kaon (proxy for net-strangeness (S)), and net-charge (Q) multiplicity distributions of Au+Au collisions at √ s NN = 7.7 ∼ 200 GeV has been measured by the STAR and PHENIX experiments from the first phase of beam energy scan program at the Relativistic Heavy Ion Collider. In this paper, i will discuss those experimental results and the corresponding physics implications.

show abstract

Lattice QCD predictions for shapes of event distributions along the freezeout curve in heavy-ion collisions

Cited by 151 publications

References 32 publications

Bridging the gap between event-by-event fluctuation measurements and theory predictions in relativistic nuclear collisions

Bridging the gap between event-by-event fluctuation measurements and theory predictions in relativistic nuclear collisions

Finite size scaling on the phase diagram of QCD

Search for the QCD Critical Point with Fluctuations of Conserved Quantities in Relativistic Heavy-Ion Collisions at RHIC

Contact Info

Product

Resources

About