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arxiv: 1205.2575 · v1 · pith:IL2EYYFCnew · submitted 2012-05-11 · ✦ hep-ph · hep-ex· hep-lat· nucl-ex· nucl-th

Timelike gamma* N -> Delta form factors and Delta Dalitz decay

classification ✦ hep-ph hep-exhep-latnucl-exnucl-th
keywords deltadalitzdecaydistributiongammaregiontimelikebeam
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We extend a covariant model, tested before in the spacelike region for the physical and lattice QCD regimes, to a calculation of the gamma* N -> Delta reaction in the timelike region, where the square of the transfered momentum, q^2, is positive (q^2>0). We estimate the Dalitz decay Delta -> Ne+e- and the Delta distribution mass distribution function. The results presented here can be used to simulate the NN -> NNe+e- reactions at moderate beam kinetic energies.

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