GlueX Analysis Workfest 2018
From GlueXWiki
Contents
- 1 Purpose
- 2 Workfest Tasks
- 2.1 R&D Team Tasks
- 2.2 Validation Team
- 2.2.1 Comparison of branching ratios between data and MC (Mark D., Tegan, Mahmoud)
- 2.2.2 Cross section evaluation for benchmark channel (Thomas, Simon)
- 2.2.3 Event-by-event studies of benchmark channels (Sean, Jon, ???)
- 2.2.4 Quantitative comparison of data and weighted phasespace MC for angular dependent analyses (Alex A., Alex B.)
- 3 Workfest Software and Conditions
- 4 Workfest Datasets
- 5 Location and Time
- 6 Registration
- 7 Remote Participation
- 8 Agenda
Purpose
- To discuss analysis tools, techniques, and results required as input for amplitude analyses and absolute cross section measurements.
- 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.
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), 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:
Workfest Datasets
2017 Low Intensity Data
Run numbers: EVIO location: REST location: Analysis TTree location:
MC Simulations Samples
Conditions
- Run number:
- Background: random trigger
- Beam energy range: Eγ = 3 - 11.6 GeV
Generators
Generator | Number of events (106) | Settings | Planned usage |
---|---|---|---|
bggen | 100 | General inclusive sample | |
gen_etaRegge | 1 | ||
gen_2pi_amp | 1 | ||
gen_omega_3pi | 1 | ||
gen_omega_radiative | 1 | ||
gen_2k_amp | 1 | ||
genr8 | 1 |
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.
- To join via a Web Browser, go to the page [1] https://bluejeans.com/115815824.
- 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)