April 5, 2013 PID Upgrade

Meeting Time and Place

Friday April 5, 2013 at 1:30pm

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).
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.

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.