arXiv:1602.06857·v1·Nuclear Experiment
Physics case for a polarised target for AFTER@LHC
J.P. Lansberg · M. Anselmino · R. Arnaldi · S.J. Brodsky · V. Chambert · J.P. Didelez · M.G Echevarria · E.G. Ferreiro · F. Fleuret · Y. Gao · B. Genolini · C. Hadjidakis
Abstract
We review a number of ideas put forward in favour of the use of a polarised target along with the proposed idea of a fixed-target experiment using the LHC beams -- AFTER@LHC. A number of recent studies have shown that single transverse-spin asymmetries (STSAs) are large enough to be precisely measured in the region accessible with AFTER@LHC, in particular as regards the Drell-Yan process as well as single-pion, isolated-photon and jet production. AFTER@LHC with a polarised target would also be the ideal experimental set-up to measure the gluon Sivers effect via a number of original quarkonium STSA studies. We discuss first figures-of-merit based on simulations for AFTER@LHC with a polarised target.
Comments: 7 pages, 2 figures, 1 table, LaTeX. Proceedings of the XVIth International Workshop in Polarized Sources, Targets, and Polarimetry, PSTP2015, 14-18 September 2015, Bochum, Germany