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Two Particle Production in Proton-Nucleus Collisions

Two Particle Production in Proton-Nucleus Collisions. Jamal Jalilian-Marian Institute for Nuclear Theory University of Washington. Probing the CGC. Deep Inelastic Scattering: ep(A) ---> eX Structure functions: F 2 , F L Particle production Nucleus - Nucleus Collisions

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Two Particle Production in Proton-Nucleus Collisions

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  1. Two Particle Productionin Proton-Nucleus Collisions Jamal Jalilian-Marian Institute for Nuclear Theory University of Washington

  2. Probing the CGC • Deep Inelastic Scattering: ep(A) ---> eX • Structure functions: F2, FL • Particle production • Nucleus - Nucleus Collisions • Initial conditions, multiplicities, CGC + …. • Proton - Nucleus Collisions • Multiplicities • Single Particle production • Hadrons, dileptons, photons • Two particle production • Hadron + photon • Hadron + hadron

  3. Color Glass Condensate • DPG: high pt, leading twist, DLA DGLAP • CQF: anomalous dimension, leading twist, BFKL • CGC: saturation region, all twist, JIMWLK

  4. Particle production in pA: hadrons • Forward rapidity at RHIC:phase space in xbj opens up • Small xbj gluons in nuclei: xbj < 0.01 • Large xbj quarks and gluons in deuteron: xbj ~ 0.1 JJM: Nucl-th/0402080 KKT: hep-ph/0405045

  5. Particle production in pA • Electromagnetic probes of CGC: cleaner • Photons • Dileptons: M is an additional knob • Recombination? FG + JJM: PRD66 (2002) 014021 JJM, NPA379 (2004) 319

  6. Two Particle Production in pA • Photon + hadron • Direct probe of the dipole cross section • Background for energy loss in AA FG + JJM: PRD66 (2002) 014021

  7. Two Gluon Production in DIS • Two gluon production • Classical • Quantum • Violation of kt factorization • Breakdown of fan diagrams + AGK approach!! JJM + YK: hep-ph/0405266

  8. Two particle production in pA • Two hadron production in the forward region • Quark + gluon JJM + YK: hep-ph/0405266

  9. Quark and Gluon Production in pA

  10. Quark and Gluon Production in pA Quark and gluon propagators

  11. Quark and Gluon Production in pA with

  12. Quark and Gluon Production in pA

  13. Quark and Gluon Production in pA

  14. Quark and Gluon Production in pA

  15. Two Hadron Production in pA Mid rapidity RHIC:classical Forward rapidity RHIC, LHC:quantum evolution Evolution equation for product of V’s, U’s (single inclusive production ~ two V’s or U’s)

  16. Summary • QCD at small xbj CGC • CGC at RHIC • AA • Initial conditions, multiplicities • pA • Multiplicities • Single particle spectra • Two particle correlations

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