1 / 10

Trigger systematics on cusp-effect

Trigger systematics on cusp-effect. Spasimir Balev 28.04.2005. Codes to MBX. For version 15.21 of MBX (27.07.2003) and later, MFKTRIG needs L1code0 OR L1code2 . L1code0 : (Q1+Q2) * [ NUT(ntpeakloose) + Q1/10*NUT(LKRminbias) + (Q1*!Q2*1u*!AKL/D4)*(KMU3-PRE) ] L1code2 :

lilia
Download Presentation

Trigger systematics on cusp-effect

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. Trigger systematics on cusp-effect Spasimir Balev 28.04.2005

  2. Codes to MBX • For version 15.21 of MBX (27.07.2003) and later, MFKTRIG needs L1code0ORL1code2. • L1code0: (Q1+Q2) * [ NUT(ntpeakloose) + Q1/10*NUT(LKRminbias) + (Q1*!Q2*1u*!AKL/D4)*(KMU3-PRE) ] • L1code2: (Q1+Q2) * [ Q2*!AKL + Q1/100 + KLrandom ] • In the normal data-taking periods: • 99.9% of triggered by MFAKE events have L1code0 set to 1 • almost all of them pass through NUT(ntpeakloose) • 9.5% of them pass through Q1/10*NUT(LKRminbias) • 31.6% of triggered by MFAKE events have L1code2 set to 1 • 98% of them pass through Q2*!AKL • 3% of them pass through Q1/100

  3. NT-PEAK bad periods • In the bad NT-PEAK periods: • only 26% of the triggered by MFAKE events have L1code0 set to 1 • 93% of them pass through Q1/10*NUT(LKRminbias) • 99% of them have NUT(ntpeakloose) bit set to 1, but it is switched OFF from L1 code • 82% of triggered by MFAKE events have L1code2 set to 1 • 98% of them pass through Q2*!AKL • 3% of them pass through Q1/100 Good events / all events SS0 SS123 15663 15753  15732 15652   15688

  4. 70% L1 to MBX inefficiency 40%    L1 to MBX inefficiency 3% 0.7% NT-PEAK bad periods (summary) • Bad period [15652 – 15663] • Bad period [15688 – 16732] NT-PEAK with huge rate, switched OFF from L1 to MBX (also switched OFF from L2) • Bad period [15733 – 15753] NT-PEAK is only with Y-projection requirement  huge inefficiency • Rejection level for SS123  -18% (only bad periods  and  removed) • To do: • NUT bad bursts? • They reject mostly events from the bad NT-PEAK periods, but not all of them • May be we can cut the oscillations of NT-PEAK before the bad periods…

  5. Kaon mass vs. day-sample Full SS123 Bad periods rejected <MK> - MKPDG, keV Day-sample

  6. (Q1+Q2) inefficiency Without bad periods 1 and 2 Full SS123 117/140 123/141 Slope: -0.012 ± 0.017 Slope: 0.011 ± 0.015 114/140 123/140 M002 * Control trigger: NT-PEAK (or T0N for NT-PEAK bad periods)

  7. NT-PEAK inefficiency 152/148 Slope: -0.0005 ± 0.0425 Without bad periods 1 and 2 M002 151/147 * Control trigger: 1TRK-P (and L1code0 through Q1/10*NUT(Minbias))

  8. 1-TRK-P bit inefficiency Without bad periods 1 and 2 Full SS123 137/148 139/148 Slope: -0.030 ± 0.074 Slope: -0.023 ± 0.075 136/147 138/147 M002 * Control trigger: NT-PEAK (or T0N for NT-PEAK bad periods)

  9. 1-TRK-P trigger inefficiency Without bad periods 1 and 2 Full SS123 153/148 178/148 Slope: 0.56 ± 0.20 Slope: 0.63 ± 0.22 151/147 177/147 M002 * Control trigger: T0N

  10. Summary • We have to be careful with the good events in bad NT-PEAK periods, because they are going through different trigger chain (Q2*!AKL) • The rejection of these periods simplify the evaluation of systematics from the trigger, but leads to big distortions in achromat UP/DOWN ratio, which is important for “neutral asymmetry” analysis (but not for cusp-effect). • The c2 of the fits of inefficiency as a function of M002 are practically the same for linear and quadratic fitting function • c2 is good for each component of the trigger chain • The slopes in linear fit are compatible with 0 for each component of the trigger chain and within 3s for the trigger itself

More Related