Endcap Electrons

This analysis is based on the work of Jan and Justin on SMD Profile Analysis for different TPC momenta. See here for a list of cuts. The original code used by Jan and Justin is here.

• Transverse running

• Analysis uses 64 out of 300 runs from 2006 pp transverse run
• MuDst are located at:

  /star/institutions/iucf/balewski/prodOfficial06_muDst/

• No trigger selection


Figure 1: Number of tracks surviving each successive cut



Figure 2a: Number of tracks per trigger id for all electron candidates. Most common trigger ids are:

127652	eemc-jp0-etot-mb-L2jet	EEMC JP > th0 (32, 4 GeV) and ETOT > TH (109, 14 GeV), minbias condition, L2 Jet algorithm, reading out slow detectors, transverse running
127271	eemc-jp1-mb	EEMC JP > th1 (49, 8 GeV) && mb, reading out slow detectors, transverse running
127641	eemc-http-mb-l2gamma	EEMC HT > th1 (12, 2.6 GeV, run < 7100052;13, 2.8 GeV, run >=7100052) and TP > TH1 (17, 3.8 GeV, run < 710052; 21, 4.7 GeV, run>=7100052 ), minbias condition, L2 Gamma algorithm, reading out slow detectors, L2 thresholds at 3.4, 5.4, transverse running
127622	bemc-jp0-etot-mb-L2jet	BEMC JP > th0 (42, 4 GeV) and ETOT > TH (109, 14 GeV), minbias condition, L2 Jet algorithm, reading out slow detectors, transverse running; L2jet thresholds at 8.0,3.6,3.3



Figure 2b: Number of tracks per trigger id for all electron candidates for p_T > 4 GeV. The dominant trigger ids become:

127641	eemc-http-mb-l2gamma	EEMC HT > th1 (12, 2.6 GeV, run < 7100052;13, 2.8 GeV, run >=7100052) and TP > TH1 (17, 3.8 GeV, run < 710052; 21, 4.7 GeV, run>=7100052 ), minbias condition, L2 Gamma algorithm, reading out slow detectors, L2 thresholds at 3.4, 5.4, transverse running
127262	eemc-ht2-mb-emul	EEMC HT > th2 (22, 5.0 GeV) && mb, reading out slow detectors, emulated in L2, transverse running, different threshold from 117262
127271	eemc-jp1-mb	EEMC JP > th1 (49, 8 GeV) && mb, reading out slow detectors, transverse running
127652	eemc-jp0-etot-mb-L2jet	EEMC JP > th0 (32, 4 GeV) and ETOT > TH (109, 14 GeV), minbias condition, L2 Jet algorithm, reading out slow detectors, transverse running



Figure 3: p_T distribution of tracks before E/p, dE/dx and pT cut



Figure 4: p_T distribution of electron candidates with p_T > 4 GeV



Figure 5: η distribution of electron candidates (all p_T)



Figure 6: φ distribution of electron candidates (all p_T)



Figure 7: dE/dx of tracks before E/p and dE/dx cuts (all p_T)



Figure 8: dE/dx of tracks before E/p and dE/dx cuts (p_T > 4 GeV)



Figure 9: dE/dx of tracks before E/p and dE/dx cuts (all p_T and 0.8 < η < 1.0)



Figure 10: dE/dx of tracks before E/p and dE/dx cuts (all p_T and 1.0 < η < 1.2)



Figure 11: dE/dx of tracks before E/p and dE/dx cuts (all p_T and 1.2 < η < 1.4)



Figure 12: dE/dx of tracks before E/p and dE/dx cuts (all p_T and 1.4 < η < 1.6)



Figure 13: dE/dx of tracks before E/p and dE/dx cuts (all p_T and 1.6 < η < 1.8)



Figure 14: dE/dx of tracks before E/p and dE/dx cuts (all p_T and 1.8 < η < 2.0)

• Click here for SMD profiles of transverse electron candidates.
• Click here for ROOT file with transverse electrons ntuple.


• Longitudinal running

• MuDst are located at:

  /star/institutions/iucf/hew/2006ppLongRuns/
  



Figure 2.1



Figure 2.2: The dominant trigger ids are:

137273	eemc-jp1-mb	EEMC JP > th1 (52, 8.7 GeV) && mb, reading out slow detectors, longitudinal running 2
137641	eemc-http-mb-l2gamma	EEMC HT > th1 (16, 3.5 GeV) and TP > th1 (20, 4.5 GeV), minbias condition, L2 Gamma algorithm, reading out slow detectors, L2 thresholds at 3.7, 5.2, longitudinal running 2
137262	eemc-ht2-mb-emul	EEMC HT > th2 (22, 5.0 GeV) && mb, reading out slow detectors, emulated in L2, longitudinal running 2
137222	bemc-jp1-mb	BEMC JP > th1 (60, 8.3 GeV) && mb, reading out slow detectors, longitudinal running 2



Figure 2.3a



Figure 2.3



Figure 2.4



Figure 2.5



Figure 2.6



Figure 2.7



Figure 2.8



Figure 2.9



Figure 2.10

• Click here for SMD profiles of longitudinal electron candidates.
• Click here for ROOT file with longitudinal electrons ntuple.

• Code

Click here for a tarball of the code used in this analysis.

• Summed SMD response

SMD response function

• f(x)=p0*(0.69*exp(-0.5*((x-p1)/0.87)**2)/(sqrt(2*pi)*0.87)+0.31*exp(-0.5*((x-p1)/3.3)**2)/(sqrt(2*pi)*3.3))
  

• p0 = yield

• p1 = centroid

Transverse

21 electrons



Longitudinal

99 electrons