Speaker
Dr
Takashi Hachiya
(RIKEN)
Description
The production of heavy quarks is a powerful tool for investigating
the dense partonic medium created in high energy heavy ion collisions.
Due to their large masses, heavy quarks are mainly produced
at the initial stage of the collisions.
Therefore the heavy quark probes is sensitive to the full time evolution
of the heavy ion collision.
The PHENIX experiment measured the strong flow (v_2) of electrons
from heavy quark decays. This indicates that the heavy quarks
interacts with the medium more than it had been expected.
However these measurements could not distinguish between charm
and bottom decays, measuring instead an admixture of the two.
We installed the silicon vertex tracker (VTX) in year 2011 as a
detector upgrade. The VTX was designed to provide a clear separation
of the charm and bottom contributions by measuring electrons with
the distance of the closest approach to the primary vertex.
In this poster, the analysis method will be described in detail and
the status of electron flow from separated charms and bottoms
in Au+Au 200GeV collisions at RHIC-PHENIX will be presented and discussed.
Primary author
Dr
Takashi Hachiya
(RIKEN)
