Lévy Analysis of HBT Correlation Functions in s N N = 62 GeV and 39 GeV Au + Au Collisions at PHENIX

In Ultra-peripheral Au+au Collisions at √ S N N = 200 Gev

We present the first measurement of photoproduction of J/ψ and of two-photon production of high-mass e+e−–pairs in electromagnetic (or ultra-peripheral) nucleusnucleus interactions, using Au+Au data at √ s NN = 200 GeV. The events are tagged with forward neutrons emitted following Coulomb excitation of one or both Au⋆ nuclei. The event sample consists of 28 events with me+e− > 2 GeV/c 2 with ze...

Parameters from Identified Hadron Spectra and HBT Radii for Au - Au Collisions at √ s NN = 200 GeV in PHENIX

The characteristics of the particle emitting source are deduced from low p T identified hadron spectra ((m T − m 0) < 1 GeV) and HBT radii using a hydrodynamic interpretation. From the most peripheral to the most central data, the single particle spectra are fit simultaneously for all π ± , K ± , and p/p using the parameterization in [ 1] and assuming a linear transverse flow profile. Within th...

Enhanced Direct Photon Production in Au + Au Collisions at √ s NN = 200 GeV in PHENIX

The production of electron pairs with p T between 1 and 5 GeV/c and m < 300 MeV has been measured at mid-rapidity in √ s N N = 200 GeV p + p and Au+Au collisions by the PHENIX experiment at RHIC. A significant excess above the hadronic background was observed in both p + p and Au+Au collisions. Treating the excess as internal conversion of direct photons, the direct photon yield in Au+Au was fo...

Direct Photons in P+p, D+au and Au+au Collisions at √ S N N = 200 Gev

The PHENIX experiment has measured direct photons at √ sNN = 200 GeV in p + p, d+Au and Au+Au collisions. For pT < 4 GeV/c, the internal conversion into e + e − pairs has been used to measure the direct photons in Au+Au.

Multistrange baryon elliptic flow in Au plus Au collisions at root(NN)-N-S=200 GeV