Following on the discovery of a strongly interacting quark-gluon plasma (QGP)
at RHIC, a program of detailed quarkonia measurements is crucial to
understanding the nature of deconfinement. Lattice QCD calculations suggest a
sequential melting of the quarkonia states in the deconfined medium. Such a
melting would lead to a suppression in the measured charmonium and bottomonium
yields. However, distinguishing a true suppression from shadowing, absorption,
and recombination effects requires detailed measurements of the charmonium
states (J/psi, psi', and chi_c) and bottomonium states (Y(1S), Y(2S), and
Y(3S)). Also, since measurements are needed not only in A+A, but also in p+p
for determining primary yields and in p+A for evaluating absorption, the
detector should perform well in all collision environments. To fully realize
the program outlined above, a new detector will be required at RHIC-II. We
present a proposal for a complete quarkonia program and the abilities of a new
detector, R2D, to meet the stated requirements. Comparisons will be made with
proposed upgrades to existing RHIC detectors and with the upcoming LHC program.Comment: 3 pages, submitted proceedings from PANIC '0
