Elliptic Flow arising from Ridges due to Semi-hard Scattering
نویسنده
چکیده
Azimuthal anisotropy in heavy-ion collisions is studied by taking into account the ridges generated by semi-hard scattering of intermediate-momentum partons, which can be sensitive to the initial spatial configuration of the medium in non-central collisions. In a simple treatment of the problem where the recombination of only thermal partons is considered, analytical formulas can be derived that yield results in accord with the data on v2 for pT <1-2 GeV/c. Centrality dependence is described by a geometrical factor. Ridge phenomenology is used to determine the initial slopes of v2 at low pT for both pion and proton. For higher pT , shower partons from high-pT jets must be included, but they are not considered here.
منابع مشابه
Physics Revealed at Intermediate p T
A review is given on the subject of hadron production at intermediate pT in heavy-ion collisions. The underlying dynamical processes are inferred from interpreting the data in the framework of recombination. Ridge formation with or without triggers is found to play an important role in nearly all observables in that pT region. Correlation data would be hard to interpret without taking ridges in...
متن کاملX iv : n uc l - ex / 0 40 70 19 v 2 4 A ug 2 00 4 ELLIPTIC FLOW AND SEMI - HARD SCATTERING AT SPS
Results on elliptic flow and two-particle correlations in the semi-hard regime are presented.
متن کامل0 40 70 19 v 1 2 0 Ju l 2 00 4 ELLIPTIC FLOW AND SEMI - HARD SCATTERING AT SPS
Results on elliptic flow and two-particle correlations in the semi-hard regime are presented.
متن کاملNew variants of the global Krylov type methods for linear systems with multiple right-hand sides arising in elliptic PDEs
In this paper, we present new variants of global bi-conjugate gradient (Gl-BiCG) and global bi-conjugate residual (Gl-BiCR) methods for solving nonsymmetric linear systems with multiple right-hand sides. These methods are based on global oblique projections of the initial residual onto a matrix Krylov subspace. It is shown that these new algorithms converge faster and more smoothly than the Gl-...
متن کاملNumerical Simulation of Separation Bubble on Elliptic Cylinders Using Three-equation k-? Turbulence Model
Occurrence of laminar separation bubbles on solid walls of an elliptic cylinder has been simulated using a recently developed transitional model for boundary layer flows. Computational method is based on the solution of the Reynolds averaged Navier-Stokes (RANS) equations and the eddy-viscosity concept. Transitional model tries to simulate streamwise fluctuations, induced by freestream turbulen...
متن کامل