[Clas12_dileptons] [EXTERNAL] Pass 2 Improvements

Richard Tyson (PGR) r.tyson.1 at research.gla.ac.uk
Mon Jul 3 08:36:45 EDT 2023

Hi All,

As you may know pass 2 has been completed for the RG-B spring2019 dataset. Unfortunately, we had some power outages due to flooding in our offices in Glasgow so I was only able to transfer over roughly 60% of spring 2019. On these 60% of spring2019 we see an improvement of:

  *   ~80% for J/psi produced on the proton ( ep_bound -> (e') e+ e- p ).
  *   ~50% for J/psi produced on the neutron ( en_bound -> (e') e+ e- n ).

I've attached some slides related showing the pass1/pass2 comparison. I'm going on holidays tomorrow so I won't be able to attend the next couple of meetings but please let me know by email if you have any questions. I think Silvia is intending to give an update at the collaboration meeting about pass 2 improvements in RG-B and I was also going to send her these slides.


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