Difference between revisions of "April 5, 2013 PID Upgrade"
From GlueXWiki
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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
- ) ESNET: 8542553
- ) SeeVogh: A conference has been booked under "GlueX PID Upgrade" from 1:00pm until 3:00pm (EDT).
- ) To phone into an SeeVogh meeting, from the U.S. call (626) 395-2112 and then enter the EVO meeting code, 155025.
- ) To use the SeeVogh Java script use the SeeVogh link.
Agenda
- Combined DIRC/CKOV PID (Baptiste)
- h'(2600) Background Investigation (John)
- 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.