1 / 29

PHENIX p/d+A , e+A overview

PHENIX p/d+A , e+A overview. p,d,e+A Workshop BNL, June 26, 2013 R. Seto University of California, Riverside. Outline. The present: Setting the stage – Old and New PHENIX results The immediate future MPC-EX: direct photons and π 0 s at high η in p+A , H 3 +Au

jeb
Download Presentation

PHENIX p/d+A , e+A overview

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. PHENIX p/d+A, e+A overview p,d,e+AWorkshop BNL, June 26, 2013 R. Seto University of California, Riverside

  2. Outline • The present: Setting the stage – Old and New PHENIX results • The immediate future • MPC-EX: • direct photons and π0s at high η in p+A, H3+Au • Further in the future (brief, covered by J. Huang, workshop 2- forward upgrades) • fSPHENIX • ePHENIX

  3. Au+Au, Pb+Pb: sQGP. How is it born? Δη s Thermalized; Hydrodynamics; Flow sQGP t~0.6 fm t Pre-thermalization; Glasma? η Initial state Color Glass Condensate? t=0.0 fm PHENIX (2011) PRL 107, 252301 “Small” systems

  4. p+Pb, d+Au A Control and the initial state PHENIX PRL 91, 072303 (2003) t η QS Initial state Color Glass Condensate? t=0.0 fm PRL 107, 172301(2011)

  5. p+Pb, d+Au LHC: the ridge?? Central 2% trig assoc Δη ? Y=“per trigger yield” Central 2% Periph 52% t η Initial state Color Glass Condensate? t=0.0 fm 2<|Δη|<5 ATLAS PRL 110 182302 (2013)

  6. p+Pb, d+Au PHENIX 0.25 Au+Au 0-5% PRL 105, 062301 (2010) v2 d+Au 0.5<|Δη|<0.7 arXiv1303.1794

  7. Mid-Forward Particle/Energy Correlations 3<|Δη|<4

  8. 3<|Δη|<4

  9. p+Pb, d+Au Δη t η Initial state Color Glass Condensate? t=0.0 fm

  10. p+Pb, d+Au Glasma? Long range rapidity Correlations Δη t~0.6 fm Glasma t Pre-thermalization; Glasma? η Initial state: Color Glass Condensate? t=0.0 fm Hypothesis I: Initial state fluctuations “inflated” to long range correlations

  11. p+Pb, d+Au Glasma? Long range rapidity Correlations Δη Atlas Data compared To Glasma model Q02(proton)=0.168 GeV2 Dusling, Venugopalan arXiv:1302.7018 (2013) t~0.6 fm Glasma t Pre-thermalization Glasma? η Initial state Color Glass Condensate? t=0.0 fm Δ ϕ Hypothesis I: Initial state fluctuations “inflated” to long range correlations

  12. p+Pb, d+Au Flow? sQGP in small systems? Δη Thermalized Hydrodynamics Flow: sQGP. sQGP t~0.6 fm Pre-thermalization Hydrodynamic Calculations P. Bozek PRC 85, 014911 Initial state Color Glass Condensate? t=0.0 fm Hypothesis II: Flow (Hydro) In a thermalized sQGP

  13. Conclusions? • None yet • Very interesting phenomena • More Experimental data/Theoretical work needed

  14. The Immediate future (p+A – run 15): MPC-EX upgrade to PHENIX • How do gluons behave at very high density (i.e. low-x) • What is the initial condition for formation of the sQGP? • Present ideas: CGC, Modified Structure functions, shadowing • RG in p+A • AN in polarizedp+A as a measure of QS • What is the origin of long range rapidity correlations in small systems? • controlling the geometry • p+A (Au, Cu, Si, C) , He3+Au • Present ideas: the Glasma, Flow in small systems Initial State?

  15. MPC-EX reconstruction of π0s and γdirect at forward rapidityfrom low Q2to kinematic limit 3.1<|η|<3.8 8 layer(4X0) Silicon minipad, Tungsten sandwich Preshower in front of PbWO4 MPC calorimeter arXiv:1301.1096

  16. How does it work? MPC: Shower energy MPC-EX  γγ invariant mass Opening angle Energy Sharing 40 GeV single γ 40 GeV π0

  17. Projected γdir Measurement of nuclear gluon distribution as benchmark Projected 90% CL Present limits

  18. Polarizedp+A Collisionsas a measurement of Qs Large π SSAs seen at forward rapidity In transversely polarized pp at RHIC Left at pt <<Qsat Right π π π Single spin asymmetries can act as a probe of the saturation scale. Kang, Yuan: PRD 84, 034019 (2011) • Dependence of QsAon A, centrality • Combined with other measurements this can estimate Qsp

  19. Spin Dependent Cross section Kang, Yuan: PRD 84, 034019 (2011) A sp Relative to Quark jet CGC inspired k┴ dependent unintegrated Gluon distribution function Low-x Transversely polarized proton P sq q k┴,π π Collins Fragmentation Function This is one mechanism. Others: e.g. Sivers: see Boer et al. PRD 74, 074018 Kang-Xiao arXiv 1212.4309 Odderon (3 gluon)exchange: YovchegovarXiv:1201.5890

  20. π0 in Polarized p+A as a tool to study Gluon saturation Left p Right A pT

  21. π0 in Polarized p+A as a tool to study Gluon saturation Left Right A p pT

  22. π0 in Polarized p+A as a tool to study Gluon saturation Left Right A p pT

  23. sPHENIX, fsPHENIX, ePHENIX The longer term

  24. ePHENIX LOI - Charge • Plans to upgrade/reconfigure PHENX to form a first generation eRHIC detector • Important part of BNL’s strategic plan for LRP • Plan for machine: • 10x100 eA @ L=6×1032 cm-2 s-1, ppequiv • 10 x255 (ep) @ L= 1033 cm-2 s-1 • Physics reach ala EIC white paper • Technical detail • Sufficient to provide a preliminary cost estimate • Rough construction schedule • Due date: Sept 30

  25. sPHENIX • Jets+heavy flavor in Heavy Ion Collisions • Replace central arms with hermetic detector • HCAL, EMCAL, Preshower, tracking w/solenoidal B arXiv:1207.6378 2015 incl MPC-EX 2019

  26. PHENIX (2013) • fsPHENIX • Physics • Transverse spin of proton • p+A studies (e.g. G1 , G2) • Heavy ions under study • Add forward arm • EMCAL, HCAL • Tracking: GEMS+Bfield • PID: RICH • ePHENIX • Physics • Nucleon spin structure (ΔG) • TMD, motion of confined partons • Parton imaging (Lum?) • Gluon saturation – diffractive events • Additional detectors • EMCAL in electron direction • DIRC in central ARMS • Replace central tracking with TPC or GEMs • Roman Pots? Details in Workshop 2: Jin Huang ~2025

  27. A detector concept – EIC collisions η~1 R (cm) R (cm) HCal η~-1 HCal EMCal -1.2 Aerogel & RICH EMCal & Preshower EMCal & Preshower μ-TPC η~4 GEM Station2 z (cm) GEMs GEMs Station1 GEM Station3 GEM Station4 DIRC p/A e- Jin Huang <jhuang@bnl.gov>

  28. PHENIX+MPC-EX → sPHENIX→fsPHENIX→ePHENIX Glasma sQGP? e+A e+p

  29. Conclusions • “small” systems (p/d/He3+A) are exhibiting exciting new phenomena • Study of initial state • New ideas • Study of pre-thermalized state (GLASMA) • Perhaps study of sQGP in small systems • MPC-EX– new tool for study of (p/d/He3+A) • Gluon “suppression” at low-x via direct photons • ANπ0 in p+A as a measurement of QS • PHENIX→sPHENIX→fsPHENIX→ePHENIX • Evolutionary program for a study of the sQGP, Cold nuclear matter (saturation), and proton spin

More Related