Speaker
Mr
Kazuya Nagashima
(Hiroshima University)
Description
We will present our ongoing study of performance for measurement of jets and heavy flavors at the sPHENIX project using a Geant4 simulation.
The sPHENIX is the planned/anticipated upgrade of the PHENIX detector at RHIC.
The physics programs of sPHENIX primarily aim at jets and heavy flavors.
The program can be much enhanced with the preshower and the EMCal that provides separation of single photons from double photons from neutral pions up to 40 GeV/c and improved electron identification.
A possible design of the preshower and a possible design change of the EMCal has been studied using a Geant4 simulation.
The preshower detector is a very thin sampling calorimeter which is hence capable to observe electromagnetic showers at their initial development.
First we caluclate the lower limit of the opening angles of double photons from 40 GeV/c neutral pions.
Setting the cell size less than the lower limit allows us to identify the double photons, hence to separate high pT single photons from high pT neutral pions.
Second, we try to improve the rejection power against charged pions to get a clean electron sample.
In other words, electron identification is another key performance goal.
The rejection power is found to reach the order of a thousand by properly choosing the cut parameters on the energy and shower shape in the preshower and the EM calorimater.
| On behalf of collaboration: | PHENIX |
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Primary author
Mr
Kazuya Nagashima
(Hiroshima University)
