文档介绍：LHC: p- Pb data taking ? Carried out on January/February 2013 Beam energy: ?s NN = 5 .02 TeV E nergy asymmetry of the LHC beams ( E p = 4 TeV , E Pb = A? TeV ) ? rapidity shift ?y= in the proton direction Beam configurations: Data collected with two beam configurations (swapping the beams) p Pb < y CMS < Pbp -< y CMS <- p Pb -< y CMS < ? Integrated luminosities (ALICE) ? ? nb -1 (p- Pb sample, forward rapidity) ? ? ?b -1 (p- Pb sample, mid- rapidity) ? ? nb -1 ( Pb -p sample, backward rapidity) Summary of charmonium results 2 J/ ? ALICE CMS LHCb R pA vs y ?? R pA prompt vs y ? R pA vs p T? Q pA vs centr . ? Rel. y ield vs N ch (E T) ??(2S) ALICE CMS LHCb R pA vs y ? R pA prompt vs y R pA vs p T? Q pA vs centr . ? Rel. y ield vs N ch (E T) Additionally ? ALICE ? Double ratios ?( 2S )/J/ ?? vs y ?vs p T? vs centrality ? ALICE ?? LHCb : similar forw ./ backw . y-range (slightly larger for LHCb ) ? Satisfactory for forw / backw J/ ?, fairly good for ?(2S), CMS results will be e 3 ?(1S) ALICE CMS LHCb R pA vs y ?? R pA prompt vs y R pA vs p TQ pA vs centr . Rel. y ield vs N ch (E T) ??(2S) ALICE CMS LHCb R pA vs y R pA prompt vs y R pA vs p TQ pA vs centr . Rel. y ield vs N ch (E T) ??(3S) ALICE CMS LHCb R pA vs y R pA prompt vs y R pA vs p TQ pA vs centr . Rel. y ield vs N ch (E T) ? Summary of bottomonium results Additionally ? CMS ? Double ratios ?(2S)/ ?(1S) ?(3S)/ ?(1S ? Integrated ? vs N ch (E T)? Just scratching the surface ? more data needed Estimating the pp reference 4? No pp data available for the moment at ? s= TeV ? Negotiations with the machine for having a short pp run in fall 2015 ? Problem ? If a short run is chosen (few days) ? Take those days from the “ pp period ”, get low L int ? If a longer run is needed (few weeks) ? Take those days from the “ Pb-Pb period ”, get large L int ? Delicate bala