Difference between revisions of "April 5, 2013 PID Upgrade"

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# [https://halldweb1.jlab.org/wiki/index.php/File:FlippedPi-K_4-5-13_JMH.pdf h'(2600) Background Investigation] (John)
 
# [https://halldweb1.jlab.org/wiki/index.php/File:FlippedPi-K_4-5-13_JMH.pdf h'(2600) Background Investigation] (John)
 
# [https://halldweb1.jlab.org/wiki/index.php/File:Pidupgrade4.5.13_v3.pdf Kinematic Smearing] (Justin)
 
# [https://halldweb1.jlab.org/wiki/index.php/File:Pidupgrade4.5.13_v3.pdf Kinematic Smearing] (Justin)
 +
 +
== Minutes ==
 +
 +
Combined DIRC/CKOV PID:
 +
* Preliminary ideas/design work for a combined PID system using the a gas threshold Cherenkov and DIRC from Babar read out with the same photodetectors.
 +
* Idea is to cover the full momentum range with combined TOF, DIRC, and CKOV for forward angles.
 +
* Several possible designs with single or double sided readout and possibly cutting the quartz bars in half.
 +
 +
h'(2600) Background Investigation:
 +
* Study details of remaining background from BDT analysis of h'(2600) channel, where the correct topology is reconstruced with the PID of two particles reversed (eg. K+ <--> pi+)
 +
* Most PID swaps are caused by ambiguous kinematics where K and pi have the same momentum magnitude.
 +
* Suppress combos with momentum of K and pi similar with a cut or include in BDT, stronger impact for high purity
 +
 +
Kinematic Smearing:
 +
* mcsmear used to degrade position resolution in single thrown pi+ sample to determine degradation in resolution expected for kinematic variables
 +
* Reconstructed tracks in data challenge data smeared by expected degradation in resolution for kinematic variables via "resolution map"
 +
* Results of selection efficiency and purity for w/ and w/out smearing, w/ and w/out CKOV for h'(2600) and eta'(2300) channels
 +
* Will produce similar studies for phi3(1850) and Y(2175) to be used in PAC proposal.

Revision as of 00:30, 8 April 2013

Meeting Time and Place

Friday April 5, 2013 at 1:30pm

Connections

To connect from the outside, please use ESNET or SeeVogh

  1. ) ESNET: 8542553
  2. ) SeeVogh: A conference has been booked under "GlueX PID Upgrade" from 1:00pm until 3:00pm (EDT).
    1. ) To phone into an SeeVogh meeting, from the U.S. call (626) 395-2112 and then enter the EVO meeting code, 155025.
    2. ) To use the SeeVogh Java script use the SeeVogh link.

Agenda

  1. Combined DIRC/CKOV PID (Baptiste)
  2. h'(2600) Background Investigation (John)
  3. Kinematic Smearing (Justin)

Minutes

Combined DIRC/CKOV PID:

  • Preliminary ideas/design work for a combined PID system using the a gas threshold Cherenkov and DIRC from Babar read out with the same photodetectors.
  • Idea is to cover the full momentum range with combined TOF, DIRC, and CKOV for forward angles.
  • Several possible designs with single or double sided readout and possibly cutting the quartz bars in half.

h'(2600) Background Investigation:

  • Study details of remaining background from BDT analysis of h'(2600) channel, where the correct topology is reconstruced with the PID of two particles reversed (eg. K+ <--> pi+)
  • Most PID swaps are caused by ambiguous kinematics where K and pi have the same momentum magnitude.
  • Suppress combos with momentum of K and pi similar with a cut or include in BDT, stronger impact for high purity

Kinematic Smearing:

  • mcsmear used to degrade position resolution in single thrown pi+ sample to determine degradation in resolution expected for kinematic variables
  • Reconstructed tracks in data challenge data smeared by expected degradation in resolution for kinematic variables via "resolution map"
  • Results of selection efficiency and purity for w/ and w/out smearing, w/ and w/out CKOV for h'(2600) and eta'(2300) channels
  • Will produce similar studies for phi3(1850) and Y(2175) to be used in PAC proposal.
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