Status DG Section of Whitepaper

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Status DG Section of Whitepaper

• J. Sowinski, A. Deshpande, Y. Goto, M.
  Stratmann,B. Surrow

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Our charge from Steve should probably
include brief updates on present projections of
Delta G and transverse spin sensitivities to be
attained in the remaining 200 GeV running Will
there be sufficient integrated luminosity to
attain the desired Delta G sensitivities in
photon and photon-jet production? If not, are
there alternatives?
For you in this talk What is missing? What is
too much? Refine the message?
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Only room for the most prominent results
PHENIX Incl. p0s
STAR Incl. jets
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These results from RHIC have had a strong impact
on our knowledge of DG
Global fit D. de Florian, R. Sassot, M. Stratmann
and V. Vogelsang
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Add run 9 to G.A. (Run6)/4
Future Increased statistics for inclusives still
have important contributions to make
DG0.15 DG0
PHENIX 25 pb-1 P60
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Semi-inclusive channels to map Dg(x)
STAR di-jets 50 pb-1 P60
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g-jets limited in statistics at 50 pb-1 but
still could have impact
100 eff. - Perfect BG rejection in STAR for
g-jets. Di-jets hard to beat but strong cross
check could be possible.
xgluon resolution greatly improved with vertex
tracker
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Placeholder for feasibility of g-jet statistical
precision
SMD shower shape bg rejection vs. g efficiency
STAR MC simulations hope to still have
something by PAC
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What about lower xgluon ?
What is Dg(x)/g(x) allowed to do for xlt0.02?
Dg(x0.02)/g(x0.02)0.05
Q2 10GeV2
FMS g-jet f correlation for pT2GeV and estimate
significant number of events in 50 pb-1 wrt
Dg(x)/g(x)0.05
Central detectors
FMS g central jet
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W physics means lots of beam time at 500
GeV. What can we do there for DG? Lower x.
The end of this talk but not the work.