APS » PROLA » Phys. Rev. Lett. » Volume 82 » Issue 1

Phys. Rev. Lett. 82, 45 - 48 (1999)

Electroproduction of the Δ(1232) Resonance at High Momentum Transfer
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V. V. Frolov et al.
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Received 3 August 1998

We studied the electroproduction of the Δ(1232) resonance via the reaction p(e,e′p)π0 at four-momentum transfers Q2  =  2.8 and 4.0 GeV2. This is the highest Q2 for which exclusive resonance electroproduction has ever been observed. Decay angular distributions for Δ→pπ0 were measured over a wide range of barycentric energies covering the resonance. The N–Δ transition form factor GM* and ratios of resonant multipoles E1+/M1+ and S1+/M1+ were extracted from the decay angular distributions. These ratios remain small, indicating that perturbative QCD is not applicable for this reaction at these momentum transfers.


©1999 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v82/p45
DOI: 10.1103/PhysRevLett.82.45
PACS: 13.60.Le, 13.40.Gp, 13.60.Rj, 14.20.Gk

* Present address: Physics Department, University of Minnesota, Minneapolis, MN 55455.
† Present address: Physics Program, Louisiana Tech University, Ruston, LA 71272.

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