Log entry time 12:58:24 on August18,2003

Entry number 111855

quick + dirty elastic analysis to check sign flip and order of magnitude of raw asymmetry. fig 1 is the dW(=W-M_He)

spectra. i integrate from 0 to 11 MeV in dW. errors are stat only.



(raw asymmetries in ppt)



run	target	BHWP	data		expect

3680 	0 deg 	OUT 	-9.8 +/- 1.5 	+7.1

3689 	0 deg 	IN 	+4.3 +/- 1.5	-7.1

3696 	180 deg IN 	-6.3 +/- 1.5	+7.1

3706 	180 deg OUT 	+8.0 +/- 1.5	-7.1



avg = 7.1 +/- 0.8



this looks okay except for the overall sign is different. i have verified that my code uses the same sign convention as the expectation. i believe that the sign difference is related to the

comment Eugene made regarding the (negative) sign of the beam polarization

(g-2 precession).



my next pass will include correction for livetime asym, correction for charge asym, target pol, beam pol, and a look at all

the runs.