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Some More Terminology Isospin is introduced to describe proton and neutron (later u- and d-quarks) as two different “polarization” states of one particle Multipole amplitudes: Similar to classical EM, the full amplitude can be decomposed in multipoles E 0, M 0, S 1, E 1, M 1 etc … (amplitudes too) Photocoupling amplitudes A 1/2, A 3/2, S 1/2 for an excited state give the probability (and the phase) of exciting such a state from proton and photon with specified combined helicity.
Form Factors 4-D analogue of Fourier transform for the spatial distribution of an object in 3-D. A good comparison point between theory and experiments. Q 2 dependent form factors can also be defined for transition from one state to another. Transition form factors are related to the internal structure of both initial and the final states.
Page 1 and 2: Monitoring of the Beam Time-Structu
Page 3 and 4: CLAS Detector in Hall B Nearly 4π
Page 5: Terminology for ep Scattering 4-mo
Page 9 and 10: S 11 (1535) and P 11 (1440) states
Page 11 and 12: Using the RF structure for PID The
Page 13 and 14: The “Sixty Hz” Application Uti
Page 15 and 16: Schematic of the System Beam bunche
Page 17 and 18: Detectors Used for the Study “Be
Page 19 and 20: Some Data Processing For some chan
Page 21 and 22: The phase of 499 MHz component We
Page 23: Conclusions Charged particle ID is

slides - CASA - Jefferson Lab

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