1 / 6

Check of new DC calib performance

Check of new DC calib performance. A new DC calibration procedure by P. De Simone and E. De Lucia has been set up, in order to act on events independently on the incoming cosmic-ray time, measured by EmC

fayre
Télécharger la présentation

Check of new DC calib performance

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Check of new DC calib performance • A new DC calibration procedure by P. De Simone and E. De Lucia has been set up, in order to act on events independently on the incoming cosmic-ray time, measured by EmC • A first effect was observed looking at the hardware efficiency for innermost 12 layers (small cells): the efficiency drop observed wrt 2002 data disappears • Use KS p+p- sample to check tracking • Compare old reconstruction wrt what is obtained using new s-t rel. • s-t from run 30875 (26 August) • using runs 30874+30882 for a total of about 200 nb-1

  2. Check of new DC calib performance • Checking tracking efficiency (sample of KL crash + 1 trk from IP) eTRK eTRK PT(MeV/c) PT(MeV/c)

  3. Check of new DC calib performance • Checking tracking efficiency (sample of KL crash + 1 trk from IP) eTRK eTRK qTRK(degrees) qTRK(degrees)

  4. Check of new DC calib performance • Checking tracking efficiency (sample of KL crash + 1 trk from IP) eTRK eTRK NEW OLD PT(MeV/c) PT(MeV/c)

  5. Check of new DC calib performance • Checking probability to split a track • Every track assigned to 3 categories: golden, kink, other (rejected) OLD CALIB NEW CALIB • In general, fraction of rejected events tends increase for p+ more than for p-. • Difficult to say with the present statistical uncertainty if assigments became more equalized

  6. Check of new DC calib performance • No big changes appear when s-t rel. from new DC calib are used • Ready to insert it in the official reconstruction, thus allowing tests to be done on larger statistics and also using Bhabha events

More Related