English

Probing Hadronic Structure with The Decay $\Delta\rightarrow Nl^+l^-$

Nuclear Theory 2008-11-26 v1

Abstract

We compute the branching ratio for ΔNe+e\Delta\rightarrow Ne^+e^- and ΔNμ+μ\Delta\rightarrow N\mu^+\mu^- in chiral perturbation theory and find that both decays should be observable at CEBAF. With sufficiently low thresholds on the e+ee^+e^- invariant mass a branching ratio of 105\sim 10^{-5} may be observed for ΔNe+e\Delta\rightarrow Ne^+e^-. For the ΔNμ+μ\Delta\rightarrow N\mu^+\mu^- decay mode we predict a branching ratio of 3×1073\times 10^{-7}. The dependence of the M1 and E2 amplitudes on the momentum transfer will provide a useful test of chiral perturbation theory which predicts 20%\sim 20\% variation over the allowed kinematic range.

Keywords

Cite

@article{arxiv.nucl-th/9303015,
  title  = {Probing Hadronic Structure with The Decay $\Delta\rightarrow Nl^+l^-$},
  author = {Malcolm N. Butler and Martin J. Savage and Roxanne P. Springer},
  journal= {arXiv preprint arXiv:nucl-th/9303015},
  year   = {2008}
}

Comments

6 pages, 3 figures, UCSD/PTH 93-06, QUSTH-93-02, Duke-TH-93-48

R2 v1 2026-07-22T18:38:38.580Z