sPHENIX HCal discussion

[Stefan Bathe <stefan.bathe AT baruch.cuny.edu>]

Dear All,

Here are the minutes from last week’s meeting (also on indico):

Regards,

Stefan

—

Dan Lis—Simulation update (see slides)

———————————————————————————

- new angular and energy distribution 

- comparison of muon peak at 4 and 40 GeV:  at 40 GeV platform is same in lower and upper towers

ACTION ITEMS:  

- include reference

- include comparison of angular shapes

- slide 4:  why channel 1 different?

Ejiro—simulation update (see slides)

————————————————————————

- comparison with Dan’s simulation:  means similar

ACTION ITEMS:

- compare full distribution (not just one parameter):  Ejiro

- why South-North difference:  Dan

Saif—PR correction (see slides)

—————————————————————

- PR now also corrected for tiles that had earlier threshold correction

- width now narrower

ACTION ITMES:

- is narrowing of width quantitatively what one would expect from width of PR distribution:  Saif

- renormalize PR to average at unity for every tile shape:  Saif 

- include corrected PR in tile installation db:  Dan Richford

Hanpu—analysis update (see slides)

————————————————————————

- higher level of low-E platform in lower towers in data is consistent with lower towers’ having platform in simulation (Dan Lis) (and lower towers not)

- edge towers (B32) show elevated level of low-E platform in both upper and lower tower

CONCLUSION:  observations consistent with cause for low-E platform being combination of muons depositing less energy in lower tower b/c of energy loss in upper tower; and muons depositing less energy b/c of trajectory only going through part of tower

- distributions of PR-corrected MPV by tile shape

  - broken down in production and preproduction

  - observation: preproduction tiles perform worse even after PR correction

CONCLUSION:  PR correction not perfect

ACTION ITEMS:

- three versions of mean MPV vs sector # plot:

  - 1) raw

  - 2) PR corrected

  - 3) PR and temperature corrected

- update plots of  PR-corrected MPV distributions (per sector) once PR entries in db are fixed

-- 

---------------------------------------------------------------------------------
Stefan Bathe

Professor of Physics
Baruch College, CUNY

Baruch:                                     BNL:
17 Lexington Ave                      Bldg. 510
office 940                                  office 2-229
phone 646-660-6272                phone 631-344-8490
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On Jul 26, 2021, at 10:25 PM, Stefan Bathe <stefan.bathe AT baruch.cuny.edu> wrote:

Dear All,

We’ll have another HCal muon calibration meeting tomorrow, Tuesday, July 27, at 11:00am:

https://indico.bnl.gov/event/12576/

(Zoom info below)

If you would like to give an update (and aren’t already on the agenda), please let me know and I’ll put you on.  

Regards,

Stefan

ZOOM INFO:

Stefan Bathe is inviting you to a scheduled Zoom meeting.

Topic: HCal Calibration
Time: This is a recurring meeting Meet anytime

Join Zoom Meeting
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Meeting ID: 817 4933 0526
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---------------------------------------------------------------------------------
Stefan Bathe

Professor of Physics
Baruch College, CUNY

Baruch:                                     BNL:
17 Lexington Ave                      Bldg. 510
office 940                                  office 2-229
phone 646-660-6272                phone 631-344-8490
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