Minutes of the Blast analysis meeting on Thursday 10/19/2006

From: Michael Kohl (kohlm@mit.edu)
Date: Thu Oct 19 2006 - 13:57:18 EDT


Hi,

below are the minutes of today's analysis meeting. The next meeting will
be on Thursday 11/02/2006 09:00am at Bates.

Find the Eugene's presentation in
http://blast.lns.mit.edu/PRIVATE_RESULTS/USEFUL/ANALYSIS_MEETINGS/meeting_061019/

Regards,

    Michael

Minutes:
d(e,e'n):
  -See ppt
  -Discrepancies beween VZ and EG's asymmetries observed, to be
   straightened out
  -Also MC asymmetries differ, though based on same MC files -> debug
   macros
  -As the following step, compare results between 2004 and 2005
  -Study e,e'n vector and tensor asymmetries, compare wit hArenhoevel, role
   of FSI at low Q2
  -Neutron time correction bar-by-bar: constant shift for vertical bars,
   angle-dependent for horizontal Ohio bars
  -Matching of missing momentum components and cms angle
  -Revision of cuts
  -Neutron rate/C: Compare with (e,e'p)/C (->Adam?), also 2004 and 2005.
   Did neutron efficiency change (drop?) in 2005?

-MK will focus on T20 next. Expect review at collaboration meeting on
  11/17
-Finalize GMn analysis thereafter

Two-photon effects:
-Richard and Michael putting together a document describing the use of
  positrons and electrons in a storage ring to measure the cross section
  ratio for e+p/e-p.
-Measurement at low epsilon (0.2-0.4): expect 5-10% effect on the ratio
  due to two-photon exchange.
-Typical beam energies ~1.8-2.5 GeV, in combination with Blast detector
-Optimized luminosity needed (unpolarized) 10^32-10^33
-To be proposed for DESY/DORIS

Status of the proton PRL (as of Oct. 19, 2006):
===============================================
CURRENT STATUS OF MANUSCRIPT: With referee(s)

CORRESPONDENCE:
SENT RECEIVED DESCRIPTION
19Oct06 Review request to referee; response not yet received
09Oct06 16Oct06 Reminder to referee; response received
09Oct06 09Oct06 Reminder to referee; response received
22Sep06 09Oct06 Review request to referee; report received
22Sep06 Review request to referee; response not yet received
15Sep06 Acknowledgment sent to author via email
15Sep06 Corr. to author (paper long; short version NOT required now)
08Sep06 Correspondence (miscellaneous) sent to author via email

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