sPHENIX is a new detector at RHIC.

[David Morrison <morrison AT bnl.gov>]

Dear collaborators,

Thanks to Stacyann Nelson (FAMU) we have the following minutes from the last general meeting.

Cheers,
Dave

There were 32 members logged in and 9 at BNL 2-219

Meeting called to order at 12:04pm by spokesperson Dave Morrison.

The meeting started with the wonderful news about the software and computing review. Dave M. noted that it was a good review and that all the 16 recommendations made in 2018 were either fully completed or partially completely going into this 2019 review. Dave  M. also mentioned that one of the most compelling and positive thing was the reconstruction of Au-Au from 500sec to 10sec a factor or 50.

He commended the collaboration on the hard work by many persons involved.  

Dave M. then presented highlights from the recently successfully concluded Science and Technology review that ended September 16^th. He noted that for this review presentations were made by Gunther(sPHENIX science), Ed Obrien(project) and local groups.

Most of the highlights surrounded the iHCAL which caused a good discussion and many persons asked questions and made suggestions for the way forward.

One such question was regarding the iHCAL on how to better improve or strengthen its impact, suggestions made by Jamie, Martin etc

Gunther suggested that to strengthen one could made energy plots and show how the resolutions is affected. He also made reference to unfolding paper by Atlas which shoed 2% systematic uncertainty increased. He suggested that this study could also be performed to see RHIC’s performance with unfolding.

There was an intense discussion on ways to better justify the iHCAL for sPHENIX, overall the suggestion was to strengthen the physics observable for the iHCAL and Ed Obrien suggested to also make the iHCAL discussion more pointed towards two leading persons.

Dave M. also mentioned that the NPPS group is advised to start working with sPHENIX in the software development area. He then went on to speak about the upcoming Quark matter. He mentioned that sPHENIX has one approved talk which will be given by Yuanjing Ji and the poster. He mentioned that some speaker for poster session were already confirmed and will be contacted by end of today but there are still posters with no speakers yet confirmed which need to be worked on soon.

Dave M. concluded his presentation speaking about other upcoming events which are listed on the final slide of his presentation.

Next presenter was Ed Obrien on the project updates. He started on the most positive news. He informed the collaboration that as of this morning PD -2/3 has been official approve as the lab director Dunne Gibbs has added his signature. He applauded the extensive hard work of the collaboration and said many thanks.

Dave M. then ask, “can we now say sPHENIX will be built?” and Ed responded with a wholehearted “YES”

Ed then continued to speak about sPHENIX project calendar, the dates of completion of various projects. He spoke of the updates for 1008 transitioning with the last sector of PHENIX completely removed. He gave an extensive list of completed projects and few that still needs paperwork follow through.  He also mentioned modification that has to be made to the track in 1008 in order to support the weight of sPHENIX.

Ed also endorses the hard work of the OHCAL group as most of the sectors are advancing well.

He finalized his talk with the budget updates. No questions were raised.

We then transistions into reports by various topical groups. Sasha B gave updates Cold QCD. He stated that so far the group has made progress, one such progress is the implementation of the forward EMCal shower profile into the Fun4All.He also relayed the progress from the John Lajoe’s group, then went on to speak about posters relating to Quark Matter 2019. He highlighted topics of interest for the posters. One interesting point which he made was the evolution into EIC. This prompted responses from Dave and Ed, whom voiced that QM2019 is good place to start up EIC evolution from PHENIX ->sPHENIX->EIC.

The jet group upgrade was presented by Rosie Reed, she started by mentioning the date of there next monthly meeting. She gave updates regarding the calibration study by Fernando who is using a Numerical Inversion method in pp. This she stated is different form method used by Iowa group.

She also brought up the idea of bringing more compelling physics for the iHCAL giving several areas such as improved Jet energy scale and resolution, better unfolding etc

 that would be of interest but needs more research.

At this Christoff mentioned that he TASK force was wondering about the procedures and how much pp luminosity varies with AuAu interms of perfectly calibrated detector.

Gunther reminded Rosie that her group has a poster for the QM2019 as such she reiterated that they will more or likely concentrate on Inclusive and semi-inclusive observables in terms of unfolding.

The next speaker, was Xin Dong. He concentrated on matters relating to the upcoming QM2019. He mentioned the one sPHENIX talk by his group member and the several areas of which the heavy flavor group would like to concentrate their effort for QM2019.His topics ranges from Λc – Hadronization, di-bi-jet performance to stream DAQ for pp- Low momentum.

Dave M. suggested that Xin contacted Ivan via regarding the paper published concerning RHIC and LHC but using different mass ranges. Dennis P asked about the kinematic difference between sPHENIX and the published paper. He also asked to be included on the email to Ivan. Dave responded that the plots will have different mass ranges, but Gunther said that further investigation is required for such observable over the mass ranges.

Gunther then went on to state that all the groups should work on improving the current plots that they have making them uniform rather than trying to work on different things in the few weeks remaining before QM2019.

Xin then asked about documentation, Gunther informed him that indico is what is been used but then something was mentioned about a BNL supported invino. Chris P stated that invino is necessary but  not the final database.

The meeting was adjourned at 1:43.

-- 
David Morrison  Brookhaven National Laboratory  phone: 631-344-5840
                Physics Department, Bldg 510 C    fax: 631-344-3253
                          Upton, NY 11973-5000  email: dave AT bnl.gov