Eur. Phys. J. A (2016) 52: 311
https://doi.org/10.1140/epja/i2016-16311-y

Regular Article - Theoretical Physics

Higher-order anisotropies in the Buda-Lund model: Disentangling flow and density field anisotropies

¹ Eötvös Loránd University, Pázmány P. s. 1/a, H-1117, Budapest, Hungary
² Stony Brook University, 11794-3400, Stony Brook, NY, USA
³ Univerzita Mateja Bela, 97401, Banská Bystrica, Slovakia
⁴ Czech Technical University in Prague, FNSPE, 11519, Prague, Czech Republic
⁵ Wigner RCP, P.O. Box 49, H-1525, Budapest 114, Hungary
⁶ KRF, Mátrai út 36, H-3200, Gyöngyös, Hungary

^* e-mail: csanad@elte.hu

Received: 1 May 2016
Accepted: 15 September 2016
Published online: 13 October 2016

Abstract

The Buda-Lund hydro model describes an expanding ellipsoidal fireball, and fits the observed elliptic flow and oscillating HBT radii successfully. Due to fluctuations in energy depositions, the fireball shape however fluctuates on an event-by-event basis. The transverse plane asymmetry can be translated into a series of multipole anisotropy coefficients. These anisotropies then result in measurable momentum-space anisotropies, to be measured with respect to their respective symmetry planes. In this paper we detail an extension of the Buda-Lund model to multipole anisotropies and investigate the resulting flow coefficients and oscillations of HBT radii.