Difference: RichDC04Perf (16 vs. 17)

Revision 172005-11-12 - ChristopherRJones

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META TOPICPARENT name="RichSoftwarePerformance"

LHCb RICH Performance in DC04

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Cherenkov Theta Angle Resolution

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The following images show the Cherenkov theta resolutions obtained in the DC04 data production, for forward tracks only (for other track types, see the attached image tar file). The resolution is defined as the difference between the reconstruction cherenkov theta angle for a given track and pixel pair, and the expected Cherenkov angle for the given track in the radiator medium (based on the reconstructed track parameters).
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The following images show the Cherenkov theta resolutions obtained in the DC04 data production, for forward tracks only (for other track types, see the the attached data files available here). The resolution is defined as the difference between the reconstruction Cherenkov theta angle for a given track and pixel pair, and the expected Cherenkov angle for the given track in the radiator medium (based on the reconstructed track parameters).

Note, if you require eps format images, these can be found in the image tar files available here.

  Aerogel CK theta resolution for forward tracks C4F10 CK theta resolution for forward tracks
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  The following figures show the distributions for the number of detected unscattered Cherenkov photons in each of the radiator media. Only saturated tracks (beta>0.99) were used.
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Note, if you require eps format images, these can be found in the image tar files available here.
 Number of unscattered detected aerogel photons per track for DC04 Number of detected <a class=C4F10 photons per track for DC04" width="567" height="384" /> Number of detected CF4 photons per track for DC04
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  The following figures show the RICH particle identification performance, as a function of momentum. No cuts on the delta Log-Likelihood values are applied; tracks are ID using the "best" measure, i.e. the mass hypothesis that gave the minimum overall likelihood.
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The figures of merit used are the RichHeavyID and RichLightID identifications for the 2 to 100 GeV momentum range, and only for forward tracks.
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The figures of merit used are the RichHeavyID and RichLightID identifications for the 2 to 100 GeV momentum range, and only for forward tracks.

Note, if you require eps format images, these can be found in the image tar files available here.

  Rich Heavy PID performance versus momentum for DC04 Rich Light PID performance versus momentum for forward tracks in DC04
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 Rich kaon PID performance versus momentum for forward tracks in DC04 Rich pion PID performance versus momentum for forward tracks in DC04
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Positive and Negative Track Comparisions

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Positive and Negative Track Comparisons

  The following images gives a comparison of the RichHeavyID and kaon performance for positive and negative tracks. The figures was produced for all track types combined. Currently the comparision is statistics limited; No difference can be seen between the positive and negative tracks. However, a small difference is expected and thus larger statistics studies will follow.
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Note, if you require eps format images, these can be found in the image tar files available here.
 Comparision of the Heavy ID performance for positive and negative tracks in DC04 Comparision of kaon ID performance for positive and negative tracks in DC04
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 The following figures given the RichHeavyID performance as a function of track momentum when only one of the two RICH detectors are used and for RICH1 when only aerogel or the C4F10 radiators are considered. The information from the other radiators are simply ignored. As with the previous performance curves, only forward tracks are included.
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Note, if you require eps format images, these can be found in the image tar files available here.
 RICH Heavy ID performance for the aerogel radiator only, for forward tracks in DC04 RICH Heavy ID performance for the <a class=C4F10 radiator only, for forward tracks in DC04" width="567" height="384" /> RICH Heavy ID performance for RICH1 only, forward tracks in DC04
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  The red points are the K->K,Pr efficiency whilst the blue points represent the pi->K,Pr mis-identification rate. The solid points give the overall performance when all radiators are combined, whilst the open crosses, squares and triangles give the individual performance in the aerogel, C4F10 and CF4 radiators respectively.
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Note, if you require eps format images, these can be found in the image tar files available here.
 The RICH Heavy ID performance in each radiator compared to that obtained overall

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