6533b833fe1ef96bd129c9da

RESEARCH PRODUCT

Measurement of the partial cross sectionsσTT,σLT, and(σT+ɛσL)of the1H(e,e′π+)nreaction in theΔ(1232)resonance

P. BourgeoisZ. L. ZhouG. TsentalivichA. HottaS. StaveTancredi BottoA. J. SartyRoss MilnerS. ŠIrcaI. NakagawaWilliam BertozziW. TurchinetzEfstathios StiliarisM. FarkondehC. TschalaerS. GeorgakopoulosJ. R. CalarcoJ. KirkpatrickR. S. HicksA. KarabarbounisF. CasagrandeRicardo AlarconYukinori SatoShalev GiladA. HoltropR. A. MiskimenJ. ShawK. A. DowS. KowalskiNikos SparverisTadaaki TamaeE. SixT. ZwartM. O. DistlerCostas N. PapanicolasAron M. BernsteinX. Jiang

subject

Nuclear reactionPhysicsNuclear and High Energy PhysicsPionMesonHadronResonanceSigmaElementary particleAtomic physicsNucleon

description

We report precision {sup 1}H(e, e{sup '{pi}+})n measurements in the {Delta}(1232) resonance at Q{sup 2}=0.127(GeV/c){sup 2} obtained at the MIT-Bates out-of-plane scattering facility. These are the lowest, but nonzero, Q{sup 2} measurements in the {pi}{sup +} channel. The data offer tests of the theoretical calculations, particularly of the background amplitude contributions. The chiral effective field theory and Sato-Lee model calculations are not in agreement with this experiment.

https://doi.org/10.1103/physrevc.84.028201