2007.09.12 Endcap Electrons

 

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 pT > 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: pT distribution of tracks before E/p, dE/dx and pT cut

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

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

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

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

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

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

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

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

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

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

    Figure 14: dE/dx of tracks before E/p and dE/dx cuts (all pT 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.

    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

Pibero Djawotho
Last updated Wed Sep 12 08:29:53 EDT 2007