Elliptic Flow arising from Ridges due to Semi-hard Scattering

Abstract

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 v_2 for p_T <1-2 GeV/c. Centrality dependence is described by a geometrical factor. Ridge phenomenology is used to determine the initial slopes of v_2 at low p_T for both pion and proton. For higher p_T, shower partons from high-p_T jets must be included, but they are not considered here.

revised version with new title and expanded discussion, to be published in Phys. Lett. B

References in corpus (15)

• Identified Charged Particle Spectra and Yields in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Elliptic Flow of Identified Hadrons in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Azimuthal anisotropy in Au+Au collisions at sqrtsNN = 200 GeV
• Elliptic flow at large transverse momenta from quark coalescence
• Particle-type dependence of azimuthal anisotropy and nuclear modification of particle production in Au+Au collisions at s(NN)**(1/2) = 200-GeV
• Distributions of Charged Hadrons Associated with High Transverse Momentum Particles in pp and Au+Au Collisions at sqrt(s_NN)=200 GeV
• Elliptic flow from two- and four-particle correlations in Au + Au collisions at sqrt{s_{NN}} = 130 GeV
• Minijet deformation and charge-independent angular correlations on momentum subspace $(\eta ,\varphi )$ in Au-Au collisions at $\sqrt{s_{NN}}$ = 130 GeV
• Recombination of Shower Partons at High $p_T$ in Heavy-Ion Collisions
• Flow systematics from SIS to SPS energies
• Pedestal and Peak Structure in Jet Correlation
• High-pT strange particle spectra and correlations in STAR
• Forward Production With Large p/πRatio and Without Jet Structure at Any p_T
• The Omega Puzzle
• Particles Associated with Omega Produced at Intermediate p_T

Cited by in corpus (14)

• Tsallis Fits to pT Spectra and Multiple Hard Scattering in pp Collisions at the LHC
• From QCD-based hard-scattering to nonextensive statistical mechanical descriptions of transverse momentum spectra in high-energy $pp$ and $p\bar{p}$ collisions
• Momentum Kick Model Description of the Ridge in (Delta-phi)-(Delta eta) Correlation in pp Collisions at 7 TeV
• Azimuthal Anisotropy: Ridges, Recombination and Breaking of Quark Number Scaling
• Momentum Kick Model Analysis of PHENIX Near-Side Ridge Data and Photon Jet
• Ridge Formation Induced by Jets in $pp$ Collisions at 7 TeV
• Hadron Correlation in Jets on the Near and Away Sides of High-p_T Triggers in Heavy-ion Collisions
• Exploring Early Parton Momentum Distribution with the Ridge from the Near-Side Jet
• Effects of Minijets on Hadronic Spectra and Azimuthal Harmonics in Au-Au Collisions at 200 GeV
• Relationship Between the Azimuthal Dependencies of Nuclear Modification Factor and Ridge Yield
• Bose-Einstein Interference in the Passage of a Jet in a Dense Medium
• Feeding of the elliptic flow by hard partons
• The Parton Bubble Model(PBM) is Connected to the Glasma Flux Tube Model(GFTM), and predicts the Ridge and Strong CP violation
• Effects of Minijets on Common Observables in Heavy-Ion Collisions with Uncommon Implications