Elong-15-03-26

11 GeV Beam

Based on discussions with Mark and Gerry, I redid the rates using a differently-binned 11 GeV bin to increase nu and <math>W_{NN}^2= 2\nu m_D+m_D^2 -Q^2</math>, as there was concern about the curves not being valid for low nu~0.5 GeV. W was replaced with W_NN, and the dotted line shows <math>W_{NN}=m_D+50</math> MeV.

t20

Using the Bosted code, I calculated first preliminary estimates for t20 using existing kinematics (although the 8.8 GeV kinematic was replaced with the above 11 GeV), utilizing 35 days of beam time. Bosted likely over-estimates statistics (see below), so take with a grain of salt.

I had been working on the parameterization of the A and B form factors, but was having difficulty finding elastic cross section data to compare the results to. Looking at the Shutz76 data (E_beam=6.519 GeV, theta=8 deg, Q^2~0.8 GeV^2), the paramterized FFs were coming up orders of magnitude short from the data, whereas Bosted did a much better job.

I have also previously looked at another set of deuteron Shutz76 cross-section data at E_beam=11.671 GeV, theta=8 deg, Q^2~2.5 GeV^2, where Misak's code worked well. However, in the intervening months I've added a number of kinematic restrictions such that it won't calculate up to x=2 for t20, which I'm still looking to fix.