Calculation of the N to Delta electromagnetic transition matrix element

A. Tsapalis (Univ. of Wuppertal); C. Alexandrou (Univ. of Cyprus); ETH Zurich); H. Neff (Univ. of Athens); J. W. Negele (MIT); K. Schilling (Univ. of Wuppertal); Ph. de Forcrand (CERN; Th. Lippert (Univ. of Wuppertal); W. Schroers (MIT)

arxiv: hep-lat/0209074 · v3 · submitted 2002-09-05 · ✦ hep-lat · nucl-ex· nucl-th

Calculation of the N to Delta electromagnetic transition matrix element

C. Alexandrou (Univ. of Cyprus) , Ph. de Forcrand (CERN , ETH Zurich) , Th. Lippert (Univ. of Wuppertal) , H. Neff (Univ. of Athens) , J. W. Negele (MIT) , K. Schilling (Univ. of Wuppertal) , W. Schroers (MIT)

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A. Tsapalis (Univ. of Wuppertal)

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classification ✦ hep-lat nucl-exnucl-th

keywords deltatransitionamplitudescalculationconsiderdipoleelectricelectromagnetic

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We present results on the ratio of electric quadrupole to magnetic dipole amplitudes, $R_{EM}={\cal G}_{E2}/{\cal G}_{M1}$, for the transition $\gamma N to \Delta$ from lattice QCD. We consider both the quenched and the 2-flavor theory.

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Calculation of the N to Delta electromagnetic transition matrix element

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