Hi,
below are the minutes of today's analysis meeting.
The next meeting (the last one of this year) will be on Thursday
12/21/2006 at 09:00am at Bates.
Find today's presentations in
http://blast.lns.mit.edu/PRIVATE_RESULTS/USEFUL/ANALYSIS_MEETINGS/meeting_061207/
Regards,
Michael
Minutes:
-MK reporting from a discussion with EG on strategy how to address
systematic errors (in GEn).
While reconstruction errors of angles and momenta can be considered
independent (for the error propagation into an observable), certain
parameters such as hPz and theta^* are actually correlated by a certain
amount. This is quantified in the propagation of correlated errors by the
correlation coefficient. This correlation coefficient could e.g. be
derived from the covariance matrix of multi-dimensional fits of the
asymmetries. Determining the hPz vs. theta^* correlation coefficient for
d(e,e'p) is on Adam's task list.
As it turned out in ep elastic, the (anti)correlation of hPz and theta^*
resulted in a reduced sensitivity of the observable (the form factor
ratio) on the uncertainties of those parameters. A similar effect might
lead to a reduction of the systematic error in GEn, as the earlier
estimate of 12%/degree due to spin angle uncertainty may become less when
the correlation with the hPz uncertainty is accounted for.
-Tavi sent plots of yields and extracted g1/s0, g2/so in p(e,e') for the
Delta region 1100<W<1400 versus Q2 and vs. x, compared with the
quantified elastic tail contribution calculated with ELRADGEN. See plots
in
http://blast.lns.mit.edu/PRIVATE_RESULTS/USEFUL/ANALYSIS_MEETINGS/meeting_061207/
-A draft proposal for moving BLAST to DESY to investigate
the multiple-photon exchange amplitude in lepton-proton elastic
scattering has been written and will be sent to Hamburg this week.
The proposed experiment aims to measure the (unpolarized) electron-proton
to positron-proton cross section ratio with 1% uncertainty in statistics
and systematics.
The proton PRL was resubmitted earlier this week.
Status of the proton PRL (as of Dec. 07, 2006):
===============================================
CURRENT STATUS OF MANUSCRIPT: With editors
CORRESPONDENCE:
SENT RECEIVED DESCRIPTION
04Dec06 Correspondence (miscellaneous) sent to author via email
30Nov06 04Dec06 Ed. decision and/or ref. comments to author; response rcvd
22Nov06 27Nov06 Review request to referee; report received
22Nov06 23Nov06 Review request to referee; report received
20Nov06 Correspondence (miscellaneous) sent to author via email
03Nov06 17Nov06 Ed. decision and/or ref. comments to author; response rcvd
03Nov06 Correspondence (miscellaneous) sent to author via email
03Nov06 Communication (miscellaneous) received from author
19Oct06 02Nov06 Review request to referee; report received
22Sep06 31Oct06 Review request to referee; report received
09Oct06 16Oct06 Reminder to referee; response received
09Oct06 09Oct06 Reminder to referee; response received
22Sep06 09Oct06 Review request to referee; report received
15Sep06 Corr. to author (paper long; short version NOT required now)
15Sep06 Acknowledgment sent to author via email
08Sep06 Correspondence (miscellaneous) sent to author via email
+-------------------------------------+--------------------------+
| Office: | Home: |
|-------------------------------------|--------------------------|
| Dr. Michael Kohl | Michael Kohl |
| Laboratory for Nuclear Science | 5 Ibbetson Street |
| MIT-Bates Linear Accelerator Center | Somerville, MA 02143 |
| Middleton, MA 01949 | U.S.A. |
| U.S.A. | |
| - - - - - - - - - - - - | - - - - - - - - -|
| Email: kohlm@mit.edu | K.Michael.Kohl@gmx.de |
| Work: +1-617-253-9207 | Home: +1-617-629-3147 |
| Fax: +1-617-253-9599 | Mobile: +1-978-580-4190 |
| http://blast.lns.mit.edu | |
+-------------------------------------+--------------------------+
This archive was generated by hypermail 2.1.2 : Mon Feb 24 2014 - 14:07:33 EST