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Revision 56 (Garth Huber, 06/14/2019 02:31 PM) → Revision 57/132 (Mireille Muhoza, 06/17/2019 11:38 AM)
h2. Experiment Overview The pion occupies a special place in nature as one of the lightest hadrons, with one valence quark, and one valence antiquark. Small as it might be, the pion is also responsible for the long range character of the strong interaction that binds the atomic nucleus together. If chiral symmetry (left-right symmetry of rules governing strong interactions) symmetry, which implies that Dirac Fermions are massless, were an exact global symmetry of strong interactions then pions would be massless. Through gluon-quark interaction and by explicit inclusion of light quark masses, chiral symmetry of massless QCD undergoes explicit symmetry breaking, thus giving the pion its mass. This puts the pion at the core of the mechanism that dynamically generates all the mass of the hadrons and makes it a crucial element in understanding hadron structure. E12-07-105 Globally, this experiment will aim to confirm the potential of pion measurements both for studies of the pion structure itself and E12-06-101 of the 3D structure of the proton, in terms of spatial imaging (tomography). This joint experiment allows for the measurement will make precise measurements of the L/T separated pion longitudinal and transverse seperated electroproduction cross section at low Q2. E12-07-105 aim is to probe conditions for factorization of deep exclusive measurements for charged pions in GPD studies and the pion form factor respectively at factor. The results may be useful in constraining the highest Q 2 achievable at a 12 GeV Jefferson Lab. Carrying out this experimetn at high values longitudinal backgrounds in the extraction of Q2 can allow us to study nonperturbative dynamics of QCD wile also searching for a transition to the perturbative regime. pion form factor from pion electroproduction data. In addition, measurements in non-parallel kinematics will allow for simultaneous extraction of the data obtained mwill provide us with information important in understanding reaction mechanisms interference terms and serve as a benchmark for test of t-dependence of the models used π+ cross section. The E12-06-101 experiment will make precise measurements at low Q2 from which we will test the method by which we can further test methods to calculate extract the structure of light hadrons. pion form factor. ------------- ---- h2. E12-06-101 and E12-07-105 Documents * Proposals: ** "E12-07-105":https://misportal.jlab.org/mis/physics/experiments/viewProposal.cfm?paperId=512 ** "E12-06-101":https://misportal.jlab.org/mis/physics/experiments/viewProposal.cfm?paperId=680 ** PAC-47 Jeopardy Document attachment:jeopardy_pac19.pdf * "Hall C Wiki":https://hallcweb.jlab.org/wiki/index.php/Main_Page * "Hall C Electronic Logbook":https://logbooks.jlab.org/book/hclog * "Hall C Information":https://www.jlab.org/physics/hall-c * "Experiment Schedule":https://www.jlab.org/physics/experiments/schedule ---- h2. Run Information * [[Run Plans and Run Sheets]] * "PionLT Specific Shift Instructions":https://hallcweb.jlab.org/wiki/index.php/Pion-LT_specific_shift_instructions * "Online Analysis Instructions":https://hallcweb.jlab.org/wiki/index.php/Pion-LT_analysis_instructions#Detailed_Online_Analysis_Instructions * "Experimental Safety Asessment Documentation Summer 2019":https://hallcweb.jlab.org/safety-docs/Summer2019/ESAD.pdf * "Conduct of Operations Summer 2019":https://hallcweb.jlab.org/safety-docs/Summer2019/ESAD.pdf * "Information for Shift Takers":https://hallcweb.jlab.org/wiki/index.php/Information_for_Shift_Takers * "Documentation for Running Hall C":https://www.jlab.org/Hall-C/document/manuals.html * "Beam Schedule":https://www.jlab.org/exp_prog/experiment_schedule/2019/20190225.0.pdf * "Shift Signup":https://misportal.jlab.org/mis/apps/physics/shiftSchedule/index.cfm?experimentRunId=HALLC-SPRING-2019 * "Shift Signup, read only":https://misportal.jlab.org/mis/physics/shiftSchedule/?experimentRunId=HALLC-SPRING-2019 * Hall C How-Tos: "1":https://hallcweb.jlab.org/document/howtos/ , "2":https://hallcweb.jlab.org/wiki/index.php/How-to * "Analysis on Cdaq":https://hallcweb.jlab.org/wiki/index.php/Analysis_How-to * "Contact Experts":https://hallcweb.jlab.org/wiki/index.php/Experts_on_call ---- h2. Data Analysis * "UTIL_PION Git Repository":https://github.com/JeffersonLab/UTIL_PION * "SIMC":https://hallcweb.jlab.org/wiki/index.php/SIMC_Monte_Carlo * "Hall C Analyzer":https://hallcweb.jlab.org/wiki/index.php/ROOT_Analyzer * [[Online Replay Histograms]] * "Joint Hall A & C Data Analysis":https://redmine.jlab.org/projects/podd/wiki/Workshop2018 * "L/T Separation Software":https://github.com/billlee77/omega_analysis (see Sec 4.2 of https://misportal.jlab.org/ul/publications/view_pub.cfm?pub_id=15234 for description) ---- h2. Meetings * "Hall C Commissioning Analysis Meetings":https://hallcweb.jlab.org/wiki/index.php/Commissioning_analysis_meetings * "Detector Working Group Meetings":https://hallcweb.jlab.org/wiki/index.php/Detector_Working_Group_Meetings#Detector_Working_Group_Meetings_in_2017 * [[Pion LT Meetings]] * [[BlueJeans Information]] ---- h2. Collaboration * [[Spokespersons]] * [[Collaboration List]] * [[Mailing List]]