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Present: Stepan, Maurik, Nathan, Matt, Tim, John, Raphael, Marzio, Omar

Please send additions and/or corrections to the EC email list.

1. Bump Hunt Paper Status.

Omar described toy studies he has been using to study fit systematics,: pulls, statistical power, and chi square. He's found that using
an exponential of a third order polynomial gives much better fits, with fewer parameters, than his previous fits with a 7th order polynomial
He is finding statistical power rather like the fits reported at JLAB last year, so the problem with very high limits seems to be solved. Fits
to the toys show relative insensitivity to the window width (maybe 14 sigma will work), have small pulls, and except at the peak of the mass
distribution, good chi squares. He's close to ready to proceed using the new function to produce new results. Tim has helped him considerably
in moving to this new parameterization and understanding its features.

The plan is as follows. Omar produces new results, and sends slides describing them to EC and PPC before this coming Friday. EC can review
these results at its meeting next week, and grants approval if merited. PPC is asked to approve (or not) on the same time table. If EC and PPC
approve the new results, they are sent to the collaboration for approval. It is understood that these results will be the final 2015 bump hunt
results, and will be incorporated into the paper and included in Matt Graham' presentation at APS.  As usual, Matt is asked to clear his slides
with PPC well before his talk on April 16.

2. Rules of the Road.

We discussed "Procedures for Presenting and Publishing Physics Results in HPS", Procedures for Presenting and Publishing Physics Results in HPS (003).DOCX
After two changes requested by Stepan
and incorporated into the text above, we approved the new rules. Stepan agreed to engineer adding the suggested changes to our present
bylaws so that the collaboration as a whole can consider them as an amendment.

3. Update Plans for the Collaboration  meeting.

Stepan discussed the proposed announcement and agendas, collmeeting_agenda (002).pdf . The announcement was approved.

Respectfully submitted,

- status of the 2015 bump hunt analysis, analysis note and the draft of the paper 
Omar presented his final results on 2015 bump hunt. Results are ~x2 worse than what was presented at JLAB in May, 2017. For finishing the analysis, it was suggested to run more toys for mass region <39 MeV, to have the same statistics as for the higher mass region. 
EC approved the new results for presentation at ICHEP. Presentation slides will be sent to PCC for a final approval. 

For publication, Matt G. worked on the analysis note, it is almost ready, just needs to update numbers and figures. The same for the paper draft. If all goes well we should have both analysis note and the paper draft for the final review by EC/PPC and the collaboration this week. Then, after the approval, paper will be ready to be posted on arxiv on week of July 9th. 
 
- 2015 vertexing results for ICHEP (note, according to our updated bylaws collaboration should see slides at least a week before the talk) 
Matt G. gave an update on analysis efforts by him, Matt S. and Holly. Analysis using Pass6-fix had weird features. He suggested to present results from analysis using the pass8 data (note, pass8 data has z-vertex mass correlation). Background beyond z-cut is the same in both cases. More discussion and presentation will be given on Wednesday.   

- target for the next physics publication 
Overall consensus is that we should push for publication of 2016 data, bump hunt and vertexing in one paper. Since much has been done already on 2015 vertexing, it was suggested to combine that with 2016 data in the next publication. The vertexing team for 2015/2016 is more or less defined. We need to assign some one for the 2016 bump hunt analysis.  

- update on upgrades and the next run configuration (start of discussions) 
This has not been discussed.John