The Future of Heavy Flavor Measurements with PHENIX Status of heavy flavor measu

The Future of Heavy Flavor Measurements with PHENIX Status of heavy flavor measu

The Future of Heavy Flavor Measurements with PHENIX Status of heavy flavor measu

Florence, Emily, Founder/President has reference to this Academic Journal, PHwiki organized this Journal The Future of Heavy Flavor Measurements with PHENIX Status of heavy flavor measurements with PHENIX Open heavy flavor Quarkonia Upgrades program as long as PHENIX Forward calorimetry NCC Precision vertex tracker VTX/FVTX Future measurements from PHENIX Charm-beauty separation with VTX in addition to FVTX Quarkonium spectroscopy with RHIC & PHENIX upgrades Summary in addition to Outlook Key Experimental Probes of Quark Matter Ruther as long as d experiment a atom discovery of nucleus SLAC electron scattering e proton discovery of quarks penetrating beam (jets or heavy particles) absorption or scattering pattern QGP Nature provides penetrating beams or “hard probes” in addition to the QGP in A-A collisions Penetrating beams created by parton scattering be as long as e QGP is as long as med High transverse momentum particles jets Heavy particles open in addition to hidden charm or bottom Calibrated probes calculable in pQCD Probe QGP created in A-A collisions as transient state after ~ 1 fm Hard Probes: Open Heavy Flavor Status Calibrated probe pQCD under predicts cross section by factor 2-5 Charm follows binary scaling Strong medium effects Significant charm suppression in addition to v2 Upper bound on viscosity Bottom potentially suppressed Open issues: Limited agreement with energy loss calculations! What is the energy loss mechanism Are there medium effects on b-quarks Electrons from c/b hadron decays Answers require direct observation of charm in addition to beauty Progress limited by: no b-c separation decay vertex with silicon vertex detectors statistics (BJ/) increase luminosity

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Hard Probes: Quarkonium Status J/y production is suppressed Large suppression Similar at RHIC in addition to SPS Larger at as long as ward rapidity Ruled out comover in addition to melting scenarios Consistent with melting J/y followed by regeneration Open issues: Are quarkonia states screened in addition to regenerated What is the regeneration (hadronisation) mechanism Can we extract a screening length from data Recent Lattice QCD developments: Quarkonium states do not melt at TC J/y Deconfinement Color screening Answers require “quarkconium” spectroscopy Progress limited by: statistics (J/, Y) increase luminosity statistical significance (’) mass resolution photon detection (cC) as long as ward calorimeter Future PHENIX Subsystems Nose Cone Calorimeter Silicon VTX in addition to FVTX MuTrig Station 1 MuTrig Station 2 MuTrig Station 3 PHENIX Upgrades in the Vertex Region VTX, FVTX in addition to NCC add key measurements to RHIC program: Heavy quark characteristics in dense medium Charmonium spectroscopy (J/, ’ , c in addition to ) Light qurak/gluon energy loss through g-jet Gluon spin structure (DG/G) through g-jet in addition to c,b quarks A-, pT-, x-dependence of the parton structure of nuclei

PHENIX Forward EM Calorimeter (NCC) W-silicon sampling calorimeter EM1 EM2 HAD NCC characteristics (DOE funding FY08) 40 cm from interaction point, 20 cm depth 2p coverage in azimuth in addition to 0.9 < h < 3.0 W-silicon sampling calorimeter 1.4 cm Mollier radius 42 X0 in addition to 1.6 labs Lateral segmentation 1.5x1.5 cm2 3 longitudinal segments 2x2 tracking layers with 500 mm strips p-g separation as long as overlapping showers PS tracking layers Main objective: direct photon in addition to p0 measurements Direct Observation of Open Charm in addition to Beauty Detection of decay vertex will allow a clean identifications of charm in addition to bottom decays m ct GeV mm D0 1865 125 D± 1869 317 B0 5279 464 B± 5279 496 Direct Observation of Open Charm in addition to Beauty Heavy flavor detection with VTX in addition to FVTX in PHENIX: Beauty in addition to low pT charm via displaced e in addition to /or m -2.710 Expected v2(be) in addition to v2(ce) with VTX Decisive measurement of v2 as long as both c in addition to b RHIC II increases statistics by factor >10 Tracking in addition to DCA Resolution with the FVTX General per as long as mance 3 or more planes hit per track Central Au+Au occupancy < 2.8% Good matching between FVTX in addition to muon tracker Sufficient DCA resolution (<200 mm) to separate prompt, heavy quark, in addition to p-K decays. D/B Monte Carlo Simulations with FVTX Heavy Ion RAA with FVTX Mechanisms as long as heavy/light quark suppression poorly understood Clear distinction among models, e.g. I.Vitev’s radiative, collisional in addition to dissociative energy loss predictions Heavy Ion RAA with FVTX (II) Statistical separation of charm in addition to bottom with DCA cuts Future Quarkonium Spectroscopy with PHENIX RHIC II luminosity upgrade Electron cooling in addition to stochastic cooling Increase integrated luminosity 2 nb-1 to 20 nb-1 per run precision measurements of RAA in addition to v2 as long as J/ FVTX: Track muons to primary vertex, reject decay background (Kmn) Improved mass resolution clean in addition to significant ‘ Background Rejection Upsilon at mid rapidity Rapidity dependence J/, ’, in addition to FVTX: Detected displaced vertex as long as charm in addition to beauty decays Precise charm in addition to beauty reference NCC: add photon measurement at as long as ward rapidity Measurement of C J/ possible Examples of Quarkonium Spectroscopy at RHIC II J/ measurements will reach high precision Charmonium Spectroscopy with the FVTX Remove p-K decays Background rejection factor 4 Improve mass resolution: 170 MeV 100 MeV Measurement of ‘ in central Au-Au collisions Au-Au p-p Charmonium spectroscopy with the NCC =1-1.5 =1.5-2 subtracted spectrum subtracted spectrum m-m (GeV/c2) Central Cu+Cu collisions S/B ~10% S/B~2% J/ in muon arm, g in NCC Conditional acceptance 58% if J/ detected Determine invariant mass in addition to subtract combinatorial background Proof of principle MC simulation pp should work, CuCu probable Full MC simulation in progress Quarkonium Spectroscopy with Forward Upgrades RHIC 2 nb-1 With NCC/FVTX RHIC 2 nb-1 W/O NCC/FVTX RHIC 20 nb-1 With NCC/FVTX ’ c J (1S) (2S) Reference model based on consecutive melting without regeneration (Note: This results in small ’, C yields, other models like regeneration model will give similar yields as long as J/, ’, C !) Timeline of PHENIX upgrades 2008 2012 RHIC 2010 Inner pixel layers electron cooling “RHIC II” 2014 Outer strip layers Construction VTX Large acceptance tracking Dh<1.2 Displaced vertex at mid rapidity FVTX Displaced vertex at as long as ward y Physics NCC Forward photon detection Florence, Emily SavvyMiss Founder/President

Summary in addition to Outlook Study of heavy flavor production provides key in as long as mation to underst in addition to the properties of quark matter Strong medium effects seem to exist at RHIC energies PHENIX devised a comprehensive upgrades program to address these issues First silicon vertex detector layers may start producing results by run 10 (Fall 2010) Expect completion of upgrades by 2011/12

Florence, Emily Founder/President

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