Investigation on the Bump in the resolution for higher energies / eta

for energies around 1000 !GeV there is a bump in the resolution for certain eta ranges... (see Fig. 1 a) - no bump and b) - pronounced bump for all calibrations )

Resolution_singeletabins_cscnote_all_J6_eta0_0.7.png Fig. 1a) J6 sample, new calibration for TopoJets, 0.0 < eta < 0.7

Resolution_singeletabins_cscnote_all_J6_eta1.5_2.5.png

Fig. 1b) J6, 1.5 < eta <2.5 here a bump is clearly visible - coming from the crack region?

This effect vanished for a finer binning in eta.... I suspect it comes from the fact, that only ONE Jxx sample was used, where the crack region resolutions dominated the resolution for a specific energy region (due to the fact that the bulk of events is in this kinematic region). See this file for more explanation: EtaBump.ppt

One more remark: It is true that the eta vs. energy plots is done for the J5 sample (unfortunately this plot is not ready for the J6 sample), but the correlation will be the same (apart from a shift along the energy axis). Furthermore, I get similar bumps in slightly different energy/eta regions for the J7 sample at the position, where they would expected, if the bulk events are responsible.

Finer eta binning

Resolution_singeletabins_FineEta_J6_0.png

Resolution_singeletabins_FineEta_J6_1.png

Resolution_singeletabins_FineEta_J6_2.png

Resolution_singeletabins_FineEta_J6_3.png

Resolution_singeletabins_FineEta_J6_4.png

Resolution_singeletabins_FineEta_J6_5.png

Resolution_singeletabins_FineEta_J6_6.png

Resolution_singeletabins_FineEta_J6_7.png

Resolution_singeletabins_FineEta_J6_8.png

-- KristinLohwasser - 25 Jul 2007

Edit | Attach | Watch | Print version | History: r3 < r2 < r1 | Backlinks | Raw View | WYSIWYG | More topic actions
Topic revision: r3 - 2007-07-26 - KristinLohwasser
 
    • Cern Search Icon Cern Search
    • TWiki Search Icon TWiki Search
    • Google Search Icon Google Search

    Main All webs login

This site is powered by the TWiki collaboration platform Powered by PerlCopyright & 2008-2019 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback