Day 76 ZDC analysis

Introduction

 

I've analyzed the following runs, taken 17 March 2009 (day 76) with the spin rotators on:

10076019-021,024-026. 

 

The fill number is 10382 with the following polarizations: yellow = 33.4+/-1.5% and blue=37.5+/-0.9%.

 

These events were taken with the standard zdc_smd_east and zdc_smd_west triggers.

Tuesday Afternoon Update

I've include runs 10076075-6.  Also I changed the form of the fit function to the phi distribution to make it more readable  now is p0*sin(x-p1) and I restrict p1 to be in the fit range of -2 to 2 radians.

 

 

 

If I look at all my results with the zdc_smd_east and zdc_smd_west triggers so far and do a weighted average of the analyzing power by the uncertainty, I get an average analyzing power of Ay = 7.6% and Ab = 7.5%. 

 

Now using the with the fit above it looks like the fractional yellow beam transverse component is 15+/-3% and the fractional blue beam  transverse is 21+/-3%.  The angles are given by the p1 variable above: 0.7+/-0.2 radians for yellow and -1.8+/-0.2 for blue.

Results - also attached as a pdf below