Publication : t02/014
Effects of momentum conservation on the analysis of anisotropic flow
Borghini N. (Service de Physique Théorique (PTH), Université Libre de Bruxelles (ULB), CP 225, Blvd. du Triomphe, B-1050 Bruxelles, BELGIQUE (BELGIUM))Dinh P.M. (CEA, DSM, SPhT (Service de Physique Théorique), F-91191 Gif-sur-Yvette, FRANCE)
Ollitrault J.-Y. (CEA, DSM, SPhT (Service de Physique Théorique), F-91191 Gif-sur-Yvette, FRANCE)
Poskanzer A.M. (Nuclear Science Division, Lawrence Berkeley National Laboratory Berkeley, CA 94720, USA)
Voloshin S.A. (Department of Physics and Astronomy, Wayne State University 666 W. Hancock Street, Detroit, MI 48202, USA)
Abstract:Année de publication : 2002
We present a general method for taking into account correlations due to momentum conservation in the analysis of anisotropic flow, either by using the two-particle correlation method or the standard flow vector method. In the latter, the correlation between the particle and the flow vector is either corrected through a redefinition (shift) of the flow vector, or subtracted explicitly from the observed flow coefficient. In addition, momentum conservation contributes to the reaction plane resolution. Momentum conservation mostly affects the first harmonic in azimuthal distributions, i.e., directed flow. It also modifies higher harmonics, for instance elliptic flow, when they are measured with respect to a first harmonic event plane such as one determined with the standard transverse momentum method. Our method is illustrated by application to NA49 data on pion directed flow.
Revue : Phys. Rev. C 66 014901 (2002)
Preprint : arXiv:nucl-th/0202013
Lien : http://link.aps.org/abstract/PRC/v66/p014901
PACS : 25.75.Ld, 25.75.Gz
Numéro Exterieur : ULB-TH/02-03
Langue : Anglais
Fichier(s) à télécharger :
publi.pdf
