Speaker
Lijuan Ruan
(Brookhaven National Laboratory)
Description
Di-leptons are ideal probes of the strongly interacting hot, dense medium
created at RHIC. They are not affected by the strong interaction once
produced, therefore they can probe the whole evolution of the collision.
In different mass regions, di-leptons can be used to probe vector meson
in-medium modifications, Quark Gluon Plasma (QGP) thermal radiations, and
color-screening features of QGP. In year 2010, the barrel time-of-flight
detector was completed, which enables clean electron identification with
full azimuthal coverage at mid-rapidity. In addition, the Muon Telescope
Detector and Heavy Flavor Tracker Upgrades, to be completed in year 2014,
providing clean muon identification and precise pointing resolution, will
enable the precise measurements of correlated charm contribution to
di-leptons, therefore, make it possible to measure QGP thermal radiation
using di-leptons. In this talk, I will review recent di-electron results
at STAR in p+p and Au+Au collisions at $\sqrt{s_{_{NN}}} = 200$ GeV and
discuss di-muon and e-muon physics capabilities with future detector
upgrades.
Primary author
Lijuan Ruan
(Brookhaven National Laboratory)
