1201.5900 (M. J. Tannenbaum)

Highlights from BNL-RHIC    [PDF]

M. J. Tannenbaum

Recent highlights from Brookhaven National Laboratory and the Relativistic
Heavy Ion Collider (RHIC) are reviewed and discussed. Topics include: Discovery
of the strongly interacting Quark Gluon Plasma (sQGP) in 2005; RHIC machine
operation in 2011 as well as latest achievements from the superconducting
Magnet Division and the National Synchrotron Light Source II project.
Highlights from QGP physics at RHIC include: comparison of new measurements of
charged multiplicity in A+A collisions by ALICE at the LHC to previous RHIC
measurements; Observation of the anti-alpha particle by the STAR experiment;
Collective Flow, including the Triangular Flow discovery and the latest results
on v3; the RHIC beam energy scan in search of the QCD critical point. The
pioneering use at RHIC of hard-scattering as a probe of the sQGP will also be
reviewed and the latest results presented including: jet-quenching via
suppression of high pT particles and two particle correlations; new results on
fragmentation functions using gamma-hadron correlations in p-p and Au+Au
collisions; comparison of jet imbalance in A+A relative to p-p collisions
measured by PHENIX using pizero-hadron correlations to CMS measurements with
reconstructed jets; first measurement by PHENIX of anisotropic flow of direct
photons in the thermal range 1< pT < 3 GeV/c, with v2 as large as that of
pions; a review of the equality of the suppression of inclusive pi0 (from light
quarks and gluons) and direct-single electrons (from the decay of heavy quarks)
in the transverse momentum range 4< pT < 9 GeV/c, at RHIC (now also seen with
reconstructed charm mesons by ALICE at the LHC) which disfavors a radiative
explanation of suppression and leads to a fundamental question of whether the
Higgs boson gives mass to fermions.

View original: http://arxiv.org/abs/1201.5900