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- Title
Quarkonium Physics at a Fixed-Target Experiment using the LHC Beams.
- Authors
Lansberg, J.; Brodsky, S.; Fleuret, F.; Hadjidakis, C.
- Abstract
We outline the many quarkonium-physics opportunities offered by a multi-purpose fixed-target experiment using the p and Pb Large Hadron Collider (LHC) beams extracted by a bent crystal. This provides an integrated luminosity of 0.5 fb per year on a typical 1 cm-long target. Such an extraction mode does not alter the performance of the collider experiments at the LHC. With such a high luminosity, one can analyse quarkonium production in great details in pp, pd and pA collisions at $${\sqrt{s_{NN}}\simeq 115}$$ GeV and at $${\sqrt{s_{NN}}\simeq 72}$$ GeV in Pb A collisions. In a typical pp ( pA) run, the obtained quarkonium yields per unit of rapidity are 2-3 orders of magnitude larger than those expected at RHIC and about, respectively, 10(70) times larger than for ALICE. In Pb A, they are comparable. By instrumenting the target-rapidity region, the large negative- x domain can be accessed for the first time, greatly extending previous measurements by Hera-B and E866. Such analyses should help resolving the quarkonium-production controversies and clear the way for gluon PDF extraction via quarkonium studies. The nuclear target-species versatility provides a unique opportunity to study nuclear matter and the features of the hot and dense matter formed in Pb A collisions. A polarised proton target allows the study of transverse-spin asymmetries in J/ ψ and $${\Upsilon}$$ production, providing access to the gluon and charm Sivers functions.
- Subjects
QUARKONIUMS; LARGE Hadron Collider; CRYSTALS; LUMINOSITY distance; COLLISIONS (Nuclear physics); GLUONS; PROTONS
- Publication
Few-Body Systems, 2012, Vol 53, Issue 1-2, p11
- ISSN
0177-7963
- Publication type
Article
- DOI
10.1007/s00601-012-0445-8