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Richard Trotta, 05/07/2018 01:21 PM

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*Welcome to the Kaon-LT Wiki Page*
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* Our meetings take place every 3-4 weeks over BlueJeans
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h1. *Notes from Meetings*
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h2. February 22, 2018
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*  Discussion of "Andres's":https://redmine.jlab.org/documents/19 slides on elastic W calculation in hcana - initial issue with negative W values seems to be due to outdated information in standard.kinematics file. Additional investigation ongoing.
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* Brief description of Samip's work - working on coincidence timing decoding with JLab staff and re-optimization of kinematics
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* Discussion of Richard's slides on run plan kinematics and preparations -
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** everyone agrees that in general want to have as many L/T cross section separations as possible in a robust run plan balancing statistics vs. systematics
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** before actual run may want to do a 3D optimization in all kinematic variables to get the best possible delta(epsilon) for the L/T separations
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** for each setting will need 1-2 shifts for calibrations - need to negotiate with other experiments in run group
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** kinematics plots W-Q2 show that still need to do some optimization
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** run sheets: include raster size, update coincidence count labeling, and carbon target labeling
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* Discussion of next meeting. Garth at JLab 8-16 March - might have meeting during that time.
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* *Action Items:*
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** Post slides/notes from this meeting and procedure to set up hcana in Redmine (Tanja)
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** Update run sheet and kinematic optimization for W/Q2 (Garth)
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** Circulate elastic calculations for kinematic settings (Samip)
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** Continue investigation of elastic data and run plan kinematics (Andres/Richard)
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** Test software installation instructions (Pete)
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** Draft email to JLab management about need for small angle beam pipe - need to have HMS minimum angle of less than 13 degrees for kaon L/T separations (Tanja) 
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h2. March 29, 2018
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* Details of adding points to fall run plan - will be ready sooner, likely in week of 4/1 (Garth, Samip, Tanja)
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* Luminosity scans (Ryan, Andres, "Richard":https://redmine.jlab.org/documents/16, Pete)
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* Macros, SIDIS analysis (Hem, Anashe)
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* Elastic data (TBD)
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h2. April 26, 2018
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* Discussion luminosity scan analysis (earlier scan) - "Richard":https://redmine.jlab.org/documents/18
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** Shown is a scaler-based analysis using scalers from report file and from ROOT tree - the values are different, why that is has to be checked
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** Notes on efficiencies in report file:
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*** DT (EDTM) is not electronic deadtime. Instead use for now 50ns* trigger rate for HMS and 100ns* trigger rate for SHMS
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*** Cherenkov efficiency seems low (check if that is due to PID, thresholds, pi/e, etc)
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*** Tracking efficiency needs to be checked
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*** 3/4 trigger efficiency seems ok
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* Discussion luminosity scan analysis (later scan) - Ryan
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** Fewer carbon runs than earlier scan
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** Shown is a tracking-based analysis using data from the ROOT trees
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** First results for carbon, LH2, and LD2, but efficiencies need to be checked
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* SIDIS analysis - Hem
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** Shown is a data/MC comparison for different kinematic settings. Agreement in shape is very good. Normalization has yet to be applied.
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** Discussion about agreement in z and apparent offset - relation of this offset with spectrometer offset
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* Analysis of exclusive events in SIDIS - Samip
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** Shown is a look at the first kaon events in exclusive limit of SIDIS data
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** Ongoing work on implementing coincidence time into tree
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* Discussion of run plan, and in particular possible low Q2/low energy
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** Assume that kaon low Q2=0.4 already included - have kinematics with specified beam energies, if needed
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** For pion form factor and LT, have two possible settings that can use the prescribed beam energies: Q2=1.45 and 0.35 GeV2 - prioritize towards the higher Q2 as not as sensitive to offsets
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** Garth will put this together in a draft email
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h2. May 10, 2018
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h1. BlueJeans Information
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* Browser: https://bluejeans.com/7578012727
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* Bluejeans app (https://www.bluejeans.com/downloads): "Join A Meeting" with Meeting ID: 7578012727 (no pass code required)
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* Phone: 1-888-240-2560 (other numbers:  http://bluejeans.com/numbers)
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** Participant code is 7578012727#