Coherent rho 0 production in ultraperipheral heavy-ion collisions

Fri, 14 Oct 2005 15:26:58 +0200

The STAR Collaboration reports the first observation of exclusive rho 0 photoproduction, AuAu-->AuAu rho 0, and rho 0 production accompanied by mutual nuclear Coulomb excitation, AuAu-->Au [star] Au [star] rho 0, in ultraperipheral heavy-ion collisions. The rho 0 have low transverse momenta, consistent with coherent coupling to both nuclei. The cross sections at sqrt[sNN]=130 GeV agree with theoretical predictions treating rho 0 production and Coulomb excitation as independent processes.

Centrality Dependence of High-pT Hadron Suppression in Au+Au Collisions at sqrt[sNN]=130 GeV

Fri, 14 Oct 2005 15:22:43 +0200

Inclusive transverse momentum distributions of charged hadrons within 0.2

Azimuthal anisotropy of K0S and Lambda + Lambda -bar production at midrapidity from Au+Au collisions at sqrt[sNN]=130 GeV

Fri, 14 Oct 2005 15:19:20 +0200

We report STAR results on the azimuthal anisotropy parameter v2 for strange particles K0S, Lambda , and Lambda -bar at midrapidity in Au+Au collisions at sqrt[sNN]=130 GeV at the Relativistic Heavy Ion Collider. The value of v2 as a function of transverse momentum, pt, of the produced particle and collision centrality is presented for both particles up to pt~3.0 GeV/c. A strong pt dependence in v2 is observed up to 2.0 GeV/c. The v2 measurement is compared with hydrodynamic model calculations. The physics implications of the pt integrated v2 magnitude as a function of particle mass are also discussed.

Two pion correlations at the STAR experiment

Dominik Bernhard Flierl — Thu, 21 Aug 2003 13:41:42 +0200

OPUS 4 Latest Documents RSS Feed

Coherent rho 0 production in ultraperipheral heavy-ion collisions

Centrality Dependence of High-pT Hadron Suppression in Au+Au Collisions at sqrt[sNN]=130 GeV

Azimuthal anisotropy of K0S and Lambda + Lambda -bar production at midrapidity from Au+Au collisions at sqrt[sNN]=130 GeV

Two pion correlations at the STAR experiment