Hydrogen runs transversity
From Hall A Wiki
- Select Electron from BigBite (1st pass)
Cut on the preshower BB.ts.ps.e>400
We could cut on the vertex z to exclude the electron from the target windows. abs(BB.tr.vz)<0.18
The formula is p_elastic = (1.231*0.938)/(0.938+1.231*(1-BB.tr.pz/BB.tr.p))
We could also cut on the expected momentum to select the elastic electrons.