GlueX Analysis Workfest 2018

From GlueXWiki
Revision as of 14:57, 4 May 2018 by Dalton (Talk | contribs) (Undo revision 86859 by Dalton (talk))

Jump to: navigation, search

Purpose

  1. To discuss analysis tools, techniques, and results required as input for amplitude analyses and absolute cross section measurements.
  2. To actively work in groups on solving these problems, with well defined deliverables to come from the Workfest.

Workfest Tasks

The workfest tasks are split into two teams below. Team mascots and logos are up for debate... suggestions welcome.

Planning discussion

R&D Team Tasks

Comparison of track and shower efficiencies between data and MC (Simon, Alex A., Jon, Will M., Ahmed)

  • Suggested studies: Missing particle in well-defined final states and measure efficiency of reconstruction
    • Possible reactions for tracking effic.: Missing π or proton in γp → π+π-p, γp → π+π-π0p, γp → π+π-π+π-p
    • Possible reactions for shower effic.: Missing γ in γp → π+π-π0p (FCAL), γp → π+π-π0π0p (BCAL?)
  • Deliverable: Initial evaluation of efficiency vs kinematic variables (p, θ, φ) for data and MC
  • Bonus points: Initial evaluation of resolution (measured - missing particle KinFit) for kinematic variables (p, θ, φ)

Comparison of kinematic fit χ2 between data and MC (Daniel, Alex B, Stuart, Mike M.)

  • Suggested studies: Analysis of multiple final states with different constrains (P4, P4+vertex, P4+vertex with mass constraints)
    • Possible reactions: γp → π+π-p (ρ and Δ++), γp → K+K-p (φ and Λ(1520)), γp → π+π-π0p (ω and η), γp → π0γp (ω), γp → π+π-ηp (η'), γp → π0π0ηp (η')
  • Deliverable: background subtracted χ2 distributions for data and MC for charged, neutral, and mixed final states
  • Bonus points: Prepare for tuning of MC parameters and/or covariance matrices to improve data/MC agreement

Validation Team

Comparison of branching ratios between data and MC (Mark D., Tegan, Mahmoud)

  • Suggested studies: Analysis of multiple decay modes for ω, η, and η' to measure ratio of branching ratios (with MC efficiency correction)
    • Possible reactions: γp → γγp (η), γp → π+π-π0p (ω and η), γp → π0π0π0p (η), γp → π0γp (ω), γp → π+π-ηp (η'), γp → π0π0ηp (η')
  • Deliverable: background subtracted and efficiency corrected ω, η and η' yields
  • Bonus points: investigate dependence on kinematic variables: Eγ, -t, etc.

Cross section evaluation for benchmark channel (Thomas, Simon)

  • Suggested studies: Evaluate all ingredients of cross section: yield, efficiency, flux for benchmark channel
    • Possible reactions: γp → π+π-p
  • Deliverable: scripts to evaluate cross section for benchmark channel with a given version of software/calibrations
  • Bonus points: implement in monitoring database

Event-by-event studies of benchmark channels (Sean, Jon, ???)

  • Suggested studies: ???
    • Possible reactions: J/ψ, Ξ, Δ++
  • Deliverable: scripts to monitor event yield and/or other observables with a given version of software/calibrations
  • Bonus points: implement in monitoring database

Quantitative comparison of data and weighted phasespace MC for angular dependent analyses (Alex A., Alex B.)

  • Suggested studies: Fit vector meson SDME using current MC efficiency to compare weighted MC with data
    • Possible reactions: γp → π+π-p (ρ), γp → K+K-p (φ)
  • Deliverable: quantitative comparison (χ2, Kolmogorov-Smirnov, etc.) of weighted phasespace MC angular distribution with data
  • Bonus points: ???

Workfest Software and Conditions

  • version.xml:
  • sim-recon branch:
  • hdds branch:
  • calibration time:
  • calibration variation:

Development of analysis scripts in hd_utilities directory?

Workfest Datasets

2017 Low Intensity Data

  • Run numbers:
  • EVIO location:
  • REST location:
  • Analysis TTree location:

MC Simulation Samples

Conditions

  • Run number:
  • Background: random trigger
  • Beam energy range: Eγ = 3 - 11.6 GeV, with coherent edge set at 8.8 GeV

Samples

Generator Number of events (106) Settings Planned usage
bggen 100 General inclusive sample for many studies
gen_etaRegge 1 η → γγ Branching Ratios, KinFit χ2
gen_etaRegge 1 η → π+π-π0 Branching Ratios, KinFit χ2
gen_etaRegge 1 η → π0π0π0 Branching Ratios, KinFit χ2
gen_etaRegge 1 η' → π+π-η Branching Ratios, KinFit χ2
gen_etaRegge 1 η' → π0π0η Branching Ratios, KinFit χ2
gen_2pi_amp 1 Physical distribution for ρ → π+π- and Phasespace KinFit χ2, Efficiencies, Cross section, ρ SDME
gen_omega_3pi 1 ω → π+π+π0 Branching Ratios, KinFit χ2, Efficiencies
gen_omega_radiative 1 ω → π0γ Branching Ratios, KinFit χ2
gen_2k_amp 1 Physical distribution for φ → K+K- and Phasespace KinFit χ2, Efficiencies, Cross section, φ SDME
gen_amp 1 b1 → ωπ0, ω → π+π+π0 Efficiencies

Location and Time

The "Workfest" will take place at:

DATES: May 15 - 17, 2018

LOCATION: CEBAF Center F326

Registration

Please add your name to the list of attendees below and indicate which task(s) you're interested in contributing to. No formal registration or registration fee is required.

Name Participate at JLab (Yes/No) Task you're interested in contributing to
Justin Stevens Yes Track/shower efficiency and accidental subtraction/flux normalization
Simon Taylor Yes Track/shower efficiency and tuning covariance matrices
Sean Dobbs Yes Track/shower efficiency and general MC tuning, statistical tools
Alex Austregesilo Yes Track/shower efficiency and accidental subtraction/flux normalization
Daniel Lersch Yes Tuning the covariance matrix for kinematic fits
Thomas Britton Yes MC tuning and accidental subtraction/flux normalization
Alex Barnes Yes Tuning covariance matrices and statistical tools
Jon Zarling Yes Track/shower efficiency with ω mesons. Tuning of inclusive MC?
Mike McCracken Prob. remote Tuning the covariance matrix for kinematic fits
Mahmoud Kamel Yes validating the track/shower efficiency determination from MC using the η/η' branching ratios
Mark Dalton Yes
Elton Smith Yes
Tegan Beattie Yes
Ahmed Foda Yes
Matt Shepherd Yes
Stuart Fegan Yes

Remote Participation

Remote participation will be possible, but the intention is to have a group of people actively working together at JLab. Thus remote participation will not be optimal.

  1. To join via a Web Browser, go to the page [1] https://bluejeans.com/115815824.
  2. More information on connecting to bluejeans is available.

Agenda

Tuesday May 15, 2018

  • 9:00 Introduction of workfest tasks and logistics (60)
    • 9:00 Workfest introduction (10)
    • 9:20 Overview of R&D team plans (25)
    • 9:40 Overview of Validation team plans (25)
  • 10:00 Begin working session (coffee provided)
  • Lunch on your own
  • 15:00 Informal update on tasks and discussion (coffee provided)

Wednesday May 16, 2018

  • 9:00 Informal update on tasks and discussion (coffee provided) (60)
  • 10:00 Begin working session
  • Lunch on your own
  • 15:00 Informal update on tasks and discussion (coffee provided)

Thursday May 17, 2018

  • 9:00 Informal update on tasks and discussion (coffee provided) (60)
  • 10:00 Begin working session
  • Lunch on your own
  • 15:00 Summary of deliverables achieved and discussion of future work (coffee provided)
    • 15:00 Summary of R&D team deliverables and future plans (60)
    • 16:00 Summary of Validation team deliverables and future plans (60)