Response of EEMC for: gamma, electron, proton, ...
Examples of showers profiles for: gamma, electron, proton ; E=6-150 GeV
Event samples with 1 track/eve for gamma, electron, muon, pion-, proton with
pt=50GeV/c, eta=1.2, phi=-90 deg,100 events/file, TTree with response and histo are at:
/star/data22/MC/balewski/pp4run3/response
Spectra of energy deposits (GEANT) at various EEMC components (pres1/2, smdU/V, post, tower) for selected particles.
Simulation was made with the muon.kumac under staf.
Simulation was made with single particle per event, shoot at phi=-90 deg with pT and eta as in the table. Energy in the table is calculated as E=pT*cosh(eta) [rest mass of particles ignored]. EEMC geometry with instrumented 12 sectors.
The .ps file are stored at http://www.star.bnl.gov/protected/spin/eemc/respons/elos-fig/ . They were generated with the rdTree.C script.
Linearity of response and energy resolution
Gaussian was fitted to tower spectra. Energy resolution sig(E)/E has two components: A/sqrt(E) and a constant B. Most of energy points were used to extract A and. (Fit could be done better ). The actual sampling fraction was used to convert fitted slope to A.
particle
| PID
| Tower only
| Tower + SMD
|
fig
| sampling
| A
| B
| fig
| sampling
| A
| B
|
gamma
| 1
| .ps
| 4%
| 15%
| 4%
| .ps
| ~5.2%
| 14%
| 2.3%
|
electron
| 3
| .ps
| .ps
|
muon -
| 6
| .ps
| .ps
|
pion -
| 9
| .ps
| .ps
|
proton
| 14
| .ps
| .ps
|
The .ps file are localized at http://www.star.bnl.gov/protected/spin/eemc/respons/e-reco/ They were generated with the plTw.C script.