| 09:00-09:45 | Theory talk | A. Accardi |
| - Structure functions should be computed at least in NLO (from PDF). Parton model is LO only;
- Fits from JLab can be made available.
| |
| 09:45-10:20 | Calculation of PVDIS Asymmetries using Different PDF Fits | X. Zheng |
| - Need to understand the error bar of CTEQ10 vs. CTEQ6 (P. Reimer will talk to a CTEQ "insider"?);
- Will talk to theorists on using NLO structure functions;
- Will look into the new "nuclear CTEQ" fits.
| |
| 10:30-11:45 | Analysis Update | D. Wang |
| - Re-check Compton, write technical notes, double-check if detector non-linearity cannot solve the systematic discrepancy;
- Asymmetry analysis: Run lists should be updated;
- Resonance/radiative corrections:
- Will include M. Gortchsteyn's results in the comparison table;
- The
simplest "toy model" would be using DIS only. WIll also try the
"reverse scaling" (i.e. larger RES vs. DIS cross sections gives smaller
RES asymmetry compare to DIS formula);
- Xiaochao will have a meeting with the theorists to discuss these results.
- (D. Armstrong): Results should be published at the acceptance averaged Q2, not the central Q2.
- (Z.-E.
Meziani): Can we use an unfolding procedure for radiative corrections?
(what's the best:) and kindly volunteered to help on this task. There
were questions of whether this would work (KK or DA?).
| |
| 11:50-12:45 | Analysis Update | K. Pan |
| - Asymmetry results:
- run-based
method should give the most accurate results (KK) but here clearly do
not agree with methods 1 and 2. Must check the analysis;
- method
#2 is slug-based but each slug is pair-based. Could use
run-based to get the slug results, then get the slug-based asymmetries
-- This is also the final method used by HAPPEX-III and PREX.
- The two asymmetry analyses (D. Wang vs. K. Pan) must agree to <0.1ppm.
- Pion asymmetry results:
- W exchange is pure weak x-section and should be much smaller than gamma-Z interference (KK, XZ);
- After
the meeting, Xin Qian did a back-of-envelope calculation using the Q2
of pion electroproduction and found the asymmetry to be fraction of the
PVDIS asymmetry.
- Xiaochao will contact theorists (A. Afanasev, C. Carlson) for possible calculations of pion asymmetries.
- (Kent):
What is the effect of pion rate on the system deadtime? Must we
simulate the pions to get the correct results? (HATS does not simulate
pions so far);
| |
| 12:45-12:50 | Summary and Outlook, more discussions | X. Zheng |