Azimuthal Anisotropy at the Relativistic Heavy Ion Collider: The First and Fourth Harmonics

Azimuthal anisotropy at the relativistic heavy ion collider: the first and fourth harmonics.

We report the first observations of the first harmonic (directed flow, v(1)) and the fourth harmonic (v(4)), in the azimuthal distribution of particles with respect to the reaction plane in Au+Au collisions at the BNL Relativistic Heavy Ion Collider (RHIC). Both measurements were done taking advantage of the large elliptic flow (v(2)) generated at RHIC. From the correlation of v(2) with v(1) it...

Physics at the Relativistic Heavy Ion Collider

Squeezed Fermions at Relativistic Heavy Ion Collider

Large back-to-back correlations of observable fermion – anti-fermion pairs are predicted to appear, if the mass of the fermions is modified in a thermalized medium. The back-to-back correlations of protons and anti-protons are experimentally observable in ultra-relativistic heavy ion collisions, similarly to the Andreev reflection of electrons off the boundary of a superconductor. Surprisingly,...

Photoproduction at the Relativistic Heavy Ion Collider with STAR

The strong electromagnetic fields of short duration associated with relativistic heavy ions make a heavy-ion collider a unique tool to study two-photon and photonuclear collisions. In this talk, we introduce the principles of photoproduction at hadron colliders, review recent results from RHIC on meson and e+e− production. At RHIC, STAR has studied exclusive ρ0 vector meson production and ρ0 pr...

The Relativistic Heavy Ion Collider Control System

The Relativistic Heavy Ion Collider control system has been used in the commissioning of the AGS to RHIC transfer line and in the first RHIC sextant test. Much of the controls infrastructure for networks and links has been installed throughout the collider. Almost all of the controls hardware modules needed for early RHIC operations have been designed and tested. Many of these VME modules are a...