sPHENIX is a new detector at RHIC.

["Perepelitsa, Dennis" <dvp AT bnl.gov>]

Hi Chris,

Thanks a lot for the nice draft slides. 

Below are some combined comments from the Colorado group, from myself and Jamie Nagle: 

JLN:

Note the agenda here:   https://indico.bnl.gov/event/9385/

Excellent font choice and layout 

slide 6 - rate good for maximum statistics and also minimal physics bias

slide 7 - EMCal has tungsten powder, fiber design (spaghetti calorimeter).   No crystals.

slide 7 - not sure about terminology.   The front-end electronics (FEE) often refers to the digitizer board that we are working on with Chi and that sits in a rack.   I think the boards on the detector are the pre-amp and shaper boards (?)

slide 8 - I think it is fine to say "rapidity" instead of "pseudorapidty" and thus keep the line alignment better.

slide 9 - nice to reference the IEE article

slide 11 - "combination" -> "combined"

slide 15 - "First measurements" -> sometimes called "Day-1 Measurements"

slide 15 - a lot of plots with lots of labels, maybe add a cartoon or text above each one (e.g. jet-jet, g-jet, with some arrows)

slide 15 - again I like to align text, example would be to return and start new line with "sPHENIX can ..."

slide 16 - excellent

slide 21 - not for this week, but it would be great (DVP) if we can make the left plot corrected for the EM-scale of the calorimeter jets.    Then one can compare the shapes of the distributions in a more apples-to-apples way.   

Very good to practice walking through the slides for time.   You have a lot of information and do not want to get stuck on words.

DVP: 

slide 6: perhaps add two-pi azimuthal acceptance? (this seems like a minor point, but it’s important for some physics measurements - such as containment asymmetrically quenched dijet pairs, characterization of total energy flow in the event, etc.)

slide 6: I would add “unbiased triggering on jets in pp reference data” - an issue at RHIC 

slide 9: you might say something about the test beams more broadly: “Multi-year campaign of test beams at FTBF with successive EMCal+HCal prototypes.” ? 

slide 11: maybe “0.1x0.1” rather than 4x4? in any case, I think the re-towering detail is probably less important than a brief description of the algorithm. you could write “iterative algorithm to estimate dE_T / deta d(layer), while attempting to exclude jets from the estimate”

slide 14: I think it’s valuable to add that for tower jets, the reconstruction and calibration can be identical in pp as in Au+Au (the UE subtraction “factorizes”) which can result in very efficient cancellation of uncertainties - key for physics!

slide 15: these plots are fine to show some expected kinematic ranges with good “out of the box” reconstruction capability. for a look at expected physics sensitivity, you could make a slide with, for example, Figs 7.2 in our Beam Use Proposal: https://indico.bnl.gov/event/7881/attachments/30176/47160/sPH-TRG-2020-001.pdf - not sure if you have the room 

slide 15: a minor point - not sure if worth mentioning - but you could add that due to smaller ISR/FSR, one has an even tighter initial photon-jet pT correlation at RHIC 

slide 23: “daily” is probably an over-dramatization, but no strong objection :) 

Dennis

On Oct 20, 2020, at 9:53 AM, Christopher McGinn <chmc7718 AT colorado.edu> wrote:

Hello all,

Here is a rough draft of my talk representing the sPHENIX jet work in the RHIC/AGS user's meeting later this week. 

https://drive.google.com/file/d/1pEfBS09YG_gKR85GRCzLoNAJdjfiwiya/view?usp=sharing

sphenixJetRHICAGS_20201022.pdf drive.google.com

I will be adding attributions (both for materials and to individuals responsible for various studies), fixing some of the mis-alignments, and clarifying text. 

Please let me know what other suggestions you have, and thank you for your time,
Chris 

---------------------------------------------------------

Christopher McGinn

PostDoctoral Associate

University of Colorado Boulder
chmc7718 AT colorado.edu 
"Pretty cool"

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Dennis V. Perepelitsa

Assistant Professor, Physics Department

University of Colorado Boulder