title: Nucleon form factor studies at JLab.
abstract: The ratio of the electromagnetic proton elastic form factors, G(p)(E)/G(p)(M), has been measured at Jefferson Lab up to Q(2) approximately 9(GeV/c)(2), by using the CEBAF 6GeV electron beam, and revealing an unexpected and challenging physical behaviour. The 2014 scheduled 12GeV upgrade will allow the measurement of G(p)(E)/G(p)(M) up to Q(2) approximately 15(GeV/c)(2), by taking advantage of the new large-acceptance forward spectrometer Super BigBite (SBS) in Hall A. Measurements of neutron form factors in the region around 10(GeV/c)(2), where quark confinement plays an important role, are expected to show the behaviour already observed in the proton case.
authors.affiliation: Dipartimento di Fisica ed Astronomia, Università di Catania, via Santa Sofia 64, I-95123 Catania, Italy. antonio.giusa@ct.infn.it
authors.forename: A
authors.initials: A
authors.lastname: Giusa
authors.forename: V
authors.initials: V
authors.lastname: Bellini
authors.forename: F
authors.initials: F
authors.lastname: Mammoliti
authors.forename: G
authors.initials: G
authors.lastname: Russo
authors.forename: M L
authors.initials: ML
authors.lastname: Sperduto
authors.forename: C M
authors.initials: CM
authors.lastname: Sutera
authors.forename: E
authors.initials: E
authors.lastname: Cisbani
authors.forename: F
authors.initials: F
authors.lastname: Garibaldi
authors.forename: G M
authors.initials: GM
authors.lastname: Urciuoli
authors.forename: M
authors.initials: M
authors.lastname: Capogni
authors.forename: G D
authors.initials: GD
authors.lastname: Cates
authors.forename: K
authors.initials: K
authors.lastname: de Jager
authors.forename: B
authors.initials: B
authors.lastname: Wojtsekhowski
mesh_terms: D004583:Electrons; D019471:Elementary Particle Interactions; D004601:Elementary Particles; D004867:Equipment Design; D009502:Neutrons; D011522:Protons; D011834:Radiation Monitoring / Q000295:instrumentation*; D013057:Spectrum Analysis / Q000295:instrumentation*
chemical_list: D011522:Protons