Quarkonium Physics at a Fixed-Target Experiment Using the LHC Beams

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We outline the many quarkonium-physics opportunities offered by a multi-purpose fixed-target experiment using the p and Pb LHC beams extracted by a bent crystal. This provides an integrated luminosity of 0.5 fb{sup -1} per year on a typical 1cm-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 {radical}s{sub NN} {approx_equal} 115 GeV and at {radical}s{sub NN} {approx_equal} 72 GeV in PbA collisions. In a typical pp (pA) run, the obtained quarkonium ... continued below

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14 pages

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Lansberg, J.P.; /Orsay, IPN; Brodsky, S.J.; /SLAC; Fleuret, F.; Polytechnique, /Ecole et al. April 9, 2012.

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We outline the many quarkonium-physics opportunities offered by a multi-purpose fixed-target experiment using the p and Pb LHC beams extracted by a bent crystal. This provides an integrated luminosity of 0.5 fb{sup -1} per year on a typical 1cm-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 {radical}s{sub NN} {approx_equal} 115 GeV and at {radical}s{sub NN} {approx_equal} 72 GeV in PbA 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 PbA, they are comparable. By instrumenting the target-rapidity region, the large negative-x{sub F} 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 PbA collisions. A polarised proton target allows the study of transverse-spin asymmetries in J/{Psi} and {Upsilon} production, providing access to the gluon and charm Sivers functions.

Physical Description

14 pages

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  • Journal Name: Few Body Syst.53:11-25,2012; Conference: Presented at 30 Years of strong interactions: a three-day meeting in honor of Joseph Cugnon and Hans-Jurgen Pirner, Spa, Liege, Belgium, 6-8 Apr 2011

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  • Report No.: SLAC-PUB-14940
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 1038421
  • Archival Resource Key: ark:/67531/metadc833988

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  • April 9, 2012

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  • May 19, 2016, 3:16 p.m.

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  • June 21, 2016, 12:43 p.m.

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Lansberg, J.P.; /Orsay, IPN; Brodsky, S.J.; /SLAC; Fleuret, F.; Polytechnique, /Ecole et al. Quarkonium Physics at a Fixed-Target Experiment Using the LHC Beams, article, April 9, 2012; United States. (digital.library.unt.edu/ark:/67531/metadc833988/: accessed January 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.