G2p Analysis Minutes

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Minutes of the weekly analysis meetings


Agenda

2/3/2016

Present: JP, Karl, Alex, Jixie, Toby, Jie, Chao, Ryan, Ellie, Vince

Feature Presentations:

  • Min

Gave an update on her acceptance study. She continued to compare the simulation result with data. Since the optics database is updated with the vertical beam position correction. The result suggests that the delta distribution is improved however the phi distribution still shows large discrepancy. She used this result to calculate the acceptance factor and applied it to the cross-section calculation. The result shows a factor of two difference. JP suggests that the acceptance calculated from the compare between the simulation and the data could still be influenced by the cross-section difference at small scattering angle. More details can be seen in her slides here.

General Discussion:

  • The replay package is restored on the work disk.
  • Toby will talk to Melissa and take over her packing fraction study.


1/26/2016

Present: Jixie, JP
By Phone: Jie, Chao, Ryan, Ellie

General Discussion:

  • The analysis meeting will be moved back to 10 am Wednesday starting from next week.
  • There is no meeting room available thus everyone will join by bluejeans. The meeting ID is 4828802914.


1/12/2016

Present: Melissa, Jixie
By Phone: Jie, Chao, Ryan, Toby, Ellie

Feature Presentations:

  • Ryan

Gave an update on his cross-section analysis of the small angle GDH data. yield study using simulation. He is working on the problem that after doing the tail subtraction and running the inelastic Radiative Correction code the fully corrected cross sections go negative at high <math>\nu</math>. To solve this, he did a fit on the Nitrogen form factor. During the fitting, two models is considered: the oscillator model and the Fermi Model and the Fermi Model is proved to be better. He will complete the calculation of the elastic tail by using the form factor in a few weeks. More details can be seen in his slides here.

  • Toby

Gave an review on the polarization uncertainty estimation. He claimed that the reason of the small uncertainties for the target polarization is because we took large amount of TE for each material. Thus the uncertainty of the calibration constant is reduced by average. Jixie suggests that the error propagation still need to be carefully checked. More details can be seen in his slides here

General Discussion:

  • Chao updated his optics technical note.
  • There is no meeting next week due to the Hall A collaboration meeting.



Jul-Dec 2015

Minutes_Jul2015_to_Dec2015


Jan-Jun 2015

Minutes_Jan2015_to_June2015


Jul-Dec 2014

Minutes_July2014_to_Dec2014


Jan-Jun 2014

Minutes_Jan2014_to_June2014


Jun-Dec 2013

Minutes_June2013_to_Dec2013


Jan-May 2013

Minutes_Jan2013_to_May2013


April-Dec 2012

Minutes_Apr2012_to_Dec2012


Jan-Mar 2012

Minutes_Jan2012_to_Mar2012


Jul-Dec 2011

Minutes_July2011_to_Dec_2011


Jan-Jun 2011

Minutes_Jan2011_to_June_2011