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Korus, R.; Mrówczyński, Stanisław

doi:10.1103/physrevc.64.054906

Cited by 27 publications

(43 citation statements)

References 7 publications

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“…Nevertheless, the small difference might indicate that, in agreement with the analysis presented in [33], there could be an additional source of correlations present in the data. However, due to the relatively high statistical and systematic errors the effect cannot be estimated quantitatively.…”

Section: Discussionsupporting

confidence: 63%

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Transverse momentum fluctuations in nuclear collisions at158AGeV

Antičić¹,

Baatar

Barna

et al. 2004

Phys. Rev. C

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Results are presented on event-by-event fluctuations in transverse momentum of charged particles, produced at forward rapidities in p + p, C + C, Si+ Si, and Pb+ Pb collisions at 158 AGeV. Three different characteristics are discussed: the average transverse momentum of the event, the ⌽ p T fluctuation measure, and two-particle transverse momentum correlations. In the kinematic region explored, the dynamical fluctuations are found to be small. However, a significant system size dependence of ⌽ p T is observed, with the largest value measured in peripheral Pb+ Pb interactions. The data are compared with predictions of several models.

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Section: Discussionsupporting

confidence: 63%

“…The ⌽ measure was already used in the previous experimental study [6] of p T fluctuations. It was also calculated within various models of nuclear collisions [29][30][31][32][33][34]. However, in these model considerations, the effects of experimental acceptance were usually not taken into account.…”

Section: Introductionmentioning

confidence: 99%

Transverse momentum fluctuations in nuclear collisions at158AGeV

Antičić¹,

Baatar

Barna

et al. 2004

Phys. Rev. C

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“…Σ p T is the mean of the covariance of all particle pairs in an event, normalized by the inclusive mean p T . Σ p T is related to the inverse of the heat capacity of the system [9]. Fig.…”

Section: Multiplicity and Transverse Momentum Fluctuationsmentioning

confidence: 99%

Scaling properties of fluctuation and correlation results from PHENIX

Mitchell

2007

J. Phys. G: Nucl. Part. Phys.

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Abstract. Recent surveys of multiplicity fluctuations, transverse momentum fluctuations, and two-particle azimuthal correlations are presented for several collision systems as a function of centrality and transverse momentum. Both multiplicity and transverse momentum fluctuations exhibit a power law scaling as a function of the number of participants that is independent of the collision system. Although these observations are consistent with critical behavior, the critical exponent η measured using azimuthal correlations is seen to be independent of centrality and collision system. Also observed in the azimuthal correlations is a displaced away side peak in central Au+Au collisions when the pairs are restricted to low transverse momentum.

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“…Integral correlations, ∆p t ∆p t , may in principle provide an estimate of event-by-event temperature fluctuations which, in turn, may provide means to determine the heat capacity of the medium formed in A + A collisions [17,18,19]. Additionally, one can also use the measureC, defined in Sect.…”

Section: Transverse Momentum Differential Correlationsmentioning

confidence: 99%

Methods for the study of transverse momentum differential correlations

Sharma

Pruneau

2009

Phys. Rev. C

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We introduce and compare three differential correlation functions for the study of transverse momentum correlation in p + p and A + A collisions. These consist of inclusive, event-wise and a differential version of the correlation measureC introduced by Gavin [1] for experimental study of the viscosity per unit entropy of the matter produced in A + A collisions. We study the quantitative difference between the three observables on the basis of PYTHIA simulations of p + p collisions and A+A collisions consisting of an arbitrary superposition of p+p collision events at √ s =200 GeV. We observe that inclusive and event-wise correlation functions are remarkably identical to each other where as the observableC differs from the two. We study the robustness and efficiency dependencies of these observables based on truncated Taylor expansions in efficiency in p + p collisions and on the basis of Monte Carlo simulation using an adhoc detector efficiency parameterization. We find that all the three observables are essentially independent of detector efficiency. We additionally study the scaling of the correlation measures and find all the observables exhibit an approximate 1/N dependence of the number of participants (N) in A + A collisions. Finally, we study the impact of flow-like anisotropy on the inclusive correlation function and find flow imparts azimuthal modulations similar to those observed with two-particle densities.

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pTfluctuations in high-energyp−pandA−A

Cited by 27 publications

References 7 publications

Transverse momentum fluctuations in nuclear collisions at158AGeV

Transverse momentum fluctuations in nuclear collisions at158AGeV

Scaling properties of fluctuation and correlation results from PHENIX

Methods for the study of transverse momentum differential correlations

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