April 5, 2013 PID Upgrade
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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.