sPHENIX HCal discussion

[Xiaochun He <xhe AT gsu.edu>]

Dear Joe,

 

Having the track projection is indeed very helpful. Thanks for the effort.

 

Given the intrinsic shower fluctuations in each of the calorimeter subsystems, I would think that the only meaningful layer locations are the entry points to each of the calorimeter system. It should be up to the calorimeter person who will take this info for the subsequent analysis needs. This is even more true when there is no PID info for the tracks.

 

With this said, I would think that it may be useful if the tracking package can provide a function call for the calorimeter analyzers for a projection at a given depth.

 

My two cents,

Xiaochun

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From: sPHENIX-HCal-l <sphenix-hcal-l-bounces AT lists.bnl.gov> on behalf of Osborn, Joe <osbornjd AT ornl.gov>
Date: Monday, February 22, 2021 at 8:20 AM
To: sphenix-emcal-l AT lists.bnl.gov <sphenix-emcal-l AT lists.bnl.gov>, sphenix-hcal-l AT lists.bnl.gov <sphenix-hcal-l AT lists.bnl.gov>
Subject: [Sphenix-hcal-l] Track-Calorimeter Projection Radii

Dear EMCal and HCal experts,

 

Following some discussion in the software meeting last week regarding track projection to the calorimeter layers, I am prioritizing getting a new track projection module functional for broader analysis use.

 

One point of discussion was to include the track projection global position with the track, so that analyzers could potentially match this track position to calorimeter clusters or towers in their own specific way depending on what kind of analysis they are performing. The track projection software takes a set of track parameters and projects them to an arbitrary cylindrical surface at a fixed radius from the beam axis.

 

So, my question is, what is the best radius to use for each of the calorimeter layers? I would assume this should correspond to the average maximum shower depth, but perhaps the experts think something else would be best.

 

Thank you,

 

Joe Osborn

 

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

 

Joe Osborn, Ph.D.

Postdoctoral Research Associate

Oak Ridge National Laboratory

osbornjd AT ornl.gov

(859)-433-8738