SN0640 : Physics Opportunities with STAR in 2020+

Author(s):The STAR Collaboration
Date:Oct. 19, 2015
File(s): STAR-2020-plan.pdf
Abstract: The 2015 NSAC Long Range plan notes in the first recommendation that "the upgraded RHIC facility provides
unique capabilities that must be utilized to explore the properties and phases of quark and gluon matter in the high
temperatures of the early universe and to explore the spin structure of the proton". In this document we outline the
STAR collaboration's plans for the 2020+ era, which are perfectly aligned with this mission. These plans include a
suite of unique measurements that can only be made with a p+p, p+A, and Au+Au collider at center-of-mass energies
below 500 GeV. They are designed to capitalize on STAR's existing resources which include a proven multi-purpose
detector, established calibration techniques and highly developed software infrastructure. The program outlined here
is an essential step towards the completion of the RHIC mission and will provide a natural transition to the highly
anticipated electron-ion collider program.
Key physics opportunities envisioned by STAR in 2020+ include:
  1.  Studies of the nuclear parton distribution and fragmentation functions
  2.  Understanding of the nature of the pomeron and potentially discovering the odderon
  3.  Extension of gluon polarization results down to low-x
  4.  Constraints on the transport coefficients ^e and ^q near Tc.
  5.  Constraints on the 3+1D hydrodynamic and temperature dependence of QGP properties

Charges from BNL ALD: 

The STAR Collaboration was charged to submit an updated assessment of the physics opportunities for the STAR detector
beyond the Beam Energy Scan II by the end of September 2015.
The document will then be sent to the PAC for comments on the proposed program.

Keywords:Upgrades, Drell-Yan, STAR2020, forward rapidity, beauty quarks, TPC limited streaming readout, longitudinal correlations