Karl Slifer
discussed his work with the QFS model and RC:
Karl presented
his work on the QFS model for GDH. He modified the
code to include external RC.
The QFS Born cross section has a strong
Q2 dependence. The
final error on the cross section is 5-10%, with about
50% from the QFS simulation.
The collaboration suggested that Karl
should look closer at the error from
QFS.
For the radiation
length of the reference cell, Karl will assume the glass is
Corning 1720. Karl plans to
work on the polarized QE cross sections.
Seonho Choi
discussed the second paper on structure functions:
The
paper will include g1/g2 integration and d2.
For the plot of d2,Seonho
raised the question what is d2
at Q2 of zero, since at present there is nothing
to compare d2 with at a
low Q2. Zein-Eddine was considering only showing
d2 in the high Q2
region.
The collaboration
thought it would be good to show all the data for d2, but only
discuss the high energy region.
The collaboration would like Zein-Eddine to send
a draft out, so that the draft could
be discussed. There is also some urgency to
get the paper out as soon as possible.
Nilanga Liyanage
discussed the third paper on twist expansions/duality:
Nilanga showed
a plot of resonance data from 94-010 vs Nuchman scaling
variable. g13He
should be plotted instead of g1n. For the next
collaboration
meeting, Nilanga will improve the
figure, and form "partial" moments of g1 using
the delta and QE resonances.
The
collaboration discussed new experiments:
Xiaodong Jiang,
discussed a new proposal that will be presented at the next
PAC. The proposal will measure
the transversity of the neutron. The experiment
will use Big Bite to detect electrons,
and the HRS to detect charged pions.
Gordon Cates
discussed the preparations for Gen at high Q2. Much work
remains to be done for a late summer
2004 run period. It is hoped that Wolfgang
will aid with the production of target
ladders, and Guido Urciuoli may help with field
calculations due to the presence of
Big Bite next to the Helmholtz coils. For the
experiment, a larger pumping chamber
will be used for the target cells, and the laser
hut will not be used.
JP Chen discussed
conferences for 2003:
JP suggested that members of the collaboration
think about possible
conferences
to which they would like to go and to let him know of any
conferences
not included on the list.
Back
to Main Minutes page.