Nuclear Physics Seminars

ics Nuclear
Tuesday, September 26, 2006
3:30 PM
Physics Building, Room 204
Inna Aznauyan [Host: Donal Day]
Jefferson Lab
"Q 2 Evolution of &gamma * N → N * Transition Amplitudes from Pion Electroproduction Data"
ABSTRACT:
I will make short introduction to clarify some notations used in N * physics and to present resonances which we have investigated within N * program of Hall B (JLab). Then I will discuss goals of N * program related to the Q 2 evolution of &gamma * N &rarr N * amplitudes. Here the focus will be on the investigation of the scale of transition from nonperturbative to perturbative regime of QCD and on the nature of the Roper resonance. Further, I will discuss approaches used for the extraction of resonance contributions to the pion electroproduction and present the results obtained from JLab (mostly Hall B) data. This will be followed by the discussion of the obtained results and conclusion.

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