### Session J13: Minisymposium on Hard Probes of the Quark-Gluon Plasma

10:45 AM–12:33 PM, Sunday, April 13, 2008
Hyatt Regency St. Louis Riverfront (formerly Adam's Mark Hotel), Room: St. Louis F

Chair: Xin-Nian Wang, Lawrence Berkeley National Laboratory

Abstract ID: BAPS.2008.APR.J13.6

### Abstract: J13.00006 : Analysis of Neutral Rho Decays from Ultra-Peripheral Collisions in Deuteron-Gold Interactions

12:09 PM–12:21 PM

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#### Author:

Stephen Hansen
(Creighton University)

This work will investigate the production of the neutral rho meson in ultra-peripheral collisions (UPCs) of deuteron and gold (dAu) nuclei. A UPC occurs when the impact parameter for the collision of two charged particles is greater than the sum of their radii. The resulting interaction is electromagnetic in nature. These nuclei are collided in the Solenoidal Tracker at RHIC (STAR), a particle detector at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory. I will present the kinematic variables of the produced rho mesons and compare them to Monte Carlo simulations. A ratio of rho production to direct pion par production will also be presented. I will also show how Monte Carlo simulations can be used to determine the geometric acceptance and reconstruction efficiency and to help differentiate between coherent and incoherent production.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.APR.J13.6