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Elke, Ernst and Huan 1

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Identified the key physics questions for pp and pA LoI Regular meeting Friday 11:00 am First Face-to-Face Meeting: January 11 th and 12 th 2014 Identified responsibles for simulating each of the key observables related to the key physics questions R&D upgrade proposals related/crucial for pp-pA physics 2013: o pp2pp phase IIa and the later full phase-II o FMS-preshower o Forward Tracking R&D before 2013: o ECal and HCal STAR & EIC R&D 2 E.C. Aschenauer

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deliverablesobservables what we learn requirementscomments/competition HP13 (2015) Test unique QCD predictions for relations between single- transverse spin phenomena in p-p scattering and those observed in deep-inelastic lepton scattering. A N for , W +/-,Z 0, DY Do TMD factorization proofs hold. Are the assumptions of ISI and FSI color interactions in pQCD are attractive and repulsive, respectively correct high luminosity trans pol pp at √s=500 GeV DY: needs instrumentation to suppress QCD backgr. by 10 6 at 3

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deliverablesobservables what we learn requirementscomments/competition DM8 (2012) determine low-x gluon densities via p(d) A direct photon potentially correlations, i.e. photon-jet initial state g(x) for AA-collisions A-scan LHC and inclusive DIS in eA eA: clean parton kinematics LHC wider/different kinematic reach; NA61 impact parameter dependent g(x,b) c.s. as fct. of t for VM production in UPC (pA or AA) initial state g(x,b) for AA-collisions high luminosity, clean UPC trigger LHC and exclusive VM production in eA eA: clean parton kinematics LHC wider/different kinematic reach “saturation physics” di-hadron correlations, -jet, h-jet & NLO DY, diffraction pT broadening for J/Ψ & DY -> Q s is the initial state for AA collisions saturated measurement of the different gluon distributions CNM vs. WW capability to measure many observables precisely large rapidity coverage to very forward rapidities polarized pA A scan complementary to eA, tests universality between pA and eA CNM effects R pA for many different final states K 0, p, K, D 0, J/Ψ,.. as fct of rapidity and collision geometry is fragmentation modified in CNM heavy quarks vs. light quarks in CNM A scan to tag charm in forward direction -vertex separation of initial and final state effects only possible in eA long range rapidty correlations “ridge” two-particle correlation at large pseudo-rapidity do these correlations also exist in pA as in AA tracking and calorimetry to very high rapidities interesting to see the √s dependence of this effect compared to LHC is GPD E g different from zero A UT for J/Ψ through UPC Ap ↑ GPD E g is responsible for L g first glimpse unique to RHIC till EIC turns on underlying subprocess for A N ( 0 ) A N for 0 and underlying subprocess for A N ( 0 ) sensitivity to Q s good 0 and reconstruction at forward rapidities resolving a legacy in transversely polarized pp collisions Key measurements for p ↑ A scattering 4

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pp & pA Obsevables: direct photon: Akio + Oleg for FMS+Preshower determines requirements; if new FCS has the same performance studies done A N for W +/- / Z 0 : Dima and Salvatore as they do the 2011 analysis already A LL jets, di-jets: Ernst and Bernd’s group gamma-jets, hadron-jets: Zhenju’s group, Huan’s group diffraction: Elke, JH, Bill S., RP-group A N ( 0 ): FMS-group A UT for J/Ψ through UPC Ap ↑ & pp ↑ : Elke, Bill S. and UPC and RP group Drell-Yan: Akio + Oleg have done already many studies for DY at 500 GeV at y > 2; A N : Bernd’s group p T broadening DY: NLO DY for Saturation: Huan’s group pp Obsevables: IFF, A UT collins & sivers: Anselm and Jim D. D LL for hyperons: Qinghua’s group PWA of the invariant mass spectrum in pp p’M X p’ in central exclusive production: JH and pp2pp-group pA Obsevables: UPC: Janet’s group, Ramiro, JH Ridge: Fuqiang Wang R pA for different final states: Saskia and jet-correlation group p T broadening for J/Ψ, Χs and di-hadron correlations: Saskia and jet-correlation group, Thomas Theorist we need to help us with predictions or impact plots: Marco Stratmann, ZhangBo, Feng, X. Wang, Andreas Metz Hannu Paukkunen / EPS-group Adrian, Jamal, Raju, Yuri, Anna * to be contacted could we get hydro predictions for the ridge. would be nice to have somebody for the exotic 5 E.C. Aschenauer

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