Speaker
Yoshimasa Ikeda
(University of Tsukuba, for the PHENIX collaboration)
Description
Azimuthal anisotropy of particle emission with respect to the reaction plane is one of the most important global observables in relativistic nucleus-nucleus collisions at RHIC.
The observation of a large anisotropy which follows specific scaling relations over a broad range of particle species is considered as evidence for the probable formation of a hot and dense partonic matter in Au+Au collisions at RHIC.
The accurate measurement of the reaction plane is a key factor in the study of azimuthal anisotropy.
In order to improve the resolution of such measurements in the PHENIX experiment at RHIC, we designed and fabricated a new Reaction Plane Detector (RxP).
RxP worked very well during the PHENIX Run7 period and demonstrated the design performance. As a result of the upgrade, the reaction plane resolution was improved by a factor of two.
This allows us to improve the precision of the measurements of azimuthal anisotropy for high-pT identified hadrons up to p_T of 6 GeV/c and v_4 up to p_T of 3 GeV/c and to perform a more detailed study of rare particles, such as Deuteron or Phi.
Primary author
Yoshimasa Ikeda
(University of Tsukuba, for the PHENIX collaboration)
