GDH Analysis Meeting
Karl Slifer discussed the Choi/Slifer
comparison for the asymmetry check:
-
Using Seonho Choi's limits, Karl's and Seonho's parallel
and perpendicular
asymmetries agree well for all energies
-
Karl compared the different limits Seonho and he applied
to
the data
-
Main cause of difference between Seonho's and Karl's
asymmetries
comes from small roundoff errors for floating
point
numbers. Asymmetries vulnerable to small accumulated
error
Summary:
-
Two asymmetry analyses give similar results
-
Some small differences remain if different run lists
and limits
are used.
(mostly below pion threshold)
-
Need to verify that statistical error correctly accounts
for prescale and
DT correction
Karl's Current Work:
-
Radiative corrections
-
Correcting cross sections for dilution
-
Prepare for talks at GDH2002
-
Fit Lightbody and O'Connel to experimental data
Zein-Eddine Meziani gave a brief
update of Seonho's analysis:
-
Worked on mostly checks
-
Examined RC issues at mostly the lowest Q2
Gordon Cates gave a brief overview
of the final work to submit the first PRL
Work to be done for GDH:
-
Begin work on second PRL paper
-
Zein-Eddine started writing the abstract and first
paragraph
-
Once the CDR for the 12 GeV upgrade is finished, Zein-Eddine
will have
the whole summer to write a good version
-
Nilanga discussed the outline for the third PRL on
twist expansion
and duality
-
g1 (g2, A1) as function
of Nach. variable on 3He
-
DIS and evolve it down to our Q2
-
Moments of g1
-
Higher twists extraction
-
Karl Slifer may write the long paper, which will focus
on final results.
-
Karl plans to graduate next spring
Conference talks:
-
Hall A Meeting: Xiaochao (A1n), Todd (g2n), Vince
(target)
-
Brookhaven (Sept. 2002): (Todd, ...)
-
GDH2002 (early July 2002): (Gordon, Nilanga,
Karl)
-
Bled: (Alexandre)
-
PANIC02: (Zein-Eddine)
-
Elba (end of June): (Wolfgang)
-
Gordon Conference: (Todd)
Future Experiments:
-
High Q2 GEn:
-
Neither spectrometer used. Use BigBite and neutron
detector
-
Field clamps will effect H0 for GEn.
Need shield plates for
higher field
-
(e'd) experiment (Doug H.)
-
Will study S' and D state of 3He (nuclear
effects)
-
Hall A, PAC 22 proposal
-
Duality experiment
-
Future d2 proposal
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