Physics case for a polarised target for AFTER@LHC

Authors :: Lansberg, J. P.
Anselmino, M.
Arnaldi, R.
Brodsky, S. J.
Chambert, V.
Didelez, J. P.
Echevarria, M. G
Ferreiro, E. G.
Fleuret, F.
Gao, Y.
Genolini, B.
Hadjidakis, C.
Hrivnacova, I.
Kikola, D.
Kurepin, A.
Lorce, C.
Massacrier, L.
Nass, A.
Pisano, C.
Schienbein, I.
Schlegel, M.
Scomparin, E.
Seixas, J.
Signori, A.
Steffens, E.
Topilskaya, N.
Uggerhoej, B. Trzeciak U. I.
Uras, A.
Ulrich, R.
Yang, Z.
Source :: PoS PSTP2015 (2015) 042
Publication Year :: 2016
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.<br />Comment: 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