Reaction plane determination using azimuthal correlations

Wilson, W.K.; Lacey, R.; Ogilvie, C. A.; Westfall, G. D.

doi:10.1103/physrevc.45.738

Cited by 67 publications

(37 citation statements)

References 26 publications

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“…The weights are either independent of transverse momentum [2,18,28,37,38] or proportional to p 2 T [41,50,60]. The latter choice is more appropriate if p T is measured, since v 2 is proportional to p 2 T at low p T [51].…”

Section: E Non-unit Weightsmentioning

confidence: 99%

Flow analysis from multiparticle azimuthal correlations

2001

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We present a new method for analyzing directed and elliptic flow in heavy ion collisions. Unlike standard methods, it separates the contribution of flow to azimuthal correlations from contributions due to other effects. The separation relies on a cumulant expansion of multiparticle azimuthal correlations, and includes corrections for detector inefficiencies. This new method allows the measurement of the flow of identified particles in narrow phase-space regions, and can be used in every regime, from intermediate to ultrarelativistic energies.25.75.Ld 25.75.Gz

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Section: E Non-unit Weightsmentioning

confidence: 99%

Flow analysis from multiparticle azimuthal correlations

2001

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“…Since Eqs. (25) and (28) can be expanded to any order, one obtains an infinite set of equations to determine the same quantity Q . The best choice for the order k will be discussed below in Sec.…”

Section: Contribution Of Flowmentioning

confidence: 99%

New method for measuring azimuthal distributions in nucleus-nucleus collisions

Borghini¹,

Dinh²,

Ollitrault³

2001

Phys. Rev. C

269

342

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The methods currently used to measure azimuthal distributions of particles in heavy ion collisions assume that all azimuthal correlations between particles result from their correlation with the reaction plane. However, other correlations exist, and it is safe to neglect them only if azimuthal anisotropies are much larger than 1/ √ N , with N the total number of particles emitted in the collision. This condition is not satisfied at ultrarelativistic energies. We propose a new method, based on a cumulant expansion of multiparticle azimuthal correlations, which allows measurements of much smaller values of azimuthal anisotropies, down to 1/N . It is simple to implement and can be used to measure both integrated and differential flow. Furthermore, this method automatically eliminates the major systematic errors, which are due to azimuthal asymmetries in the detector acceptance.

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“…The literature offers many different methods to estimate the reaction plane, like the flow-tensor method [78], the fission-fragment plane [122], the flow Q-vector method [98], the transverse momentum tensor [123] (also called 'azimuthal correlation' [124]) method or others [125].…”

Section: Flow Reaction Plane and Correctionsmentioning

confidence: 99%