The ratio of the electromagnetic proton elastic form factors, G(E)(p)/G(M)(p), has been measured at Jefferson Lab up to Q(2) approximate to 9 (GeV/c)(2), by using the CEBAF 6 GeV electron beam, and revealing an unexpected and challenging physical behaviour. The 2014 scheduled 12 GeV upgrade will allow the measurement of G(E)(p)/G(M)(p) up to Q(2) approximate to 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. (C) 2010 Elsevier Ltd. All rights reserved.

Nucleon form factor studies at JLab

BELLINI, Vincenzo;MAMMOLITI, FRANCESCO;RUSSO, Giuseppe;SUTERA, CONCETTA MARIA;
2011-01-01

Abstract

The ratio of the electromagnetic proton elastic form factors, G(E)(p)/G(M)(p), has been measured at Jefferson Lab up to Q(2) approximate to 9 (GeV/c)(2), by using the CEBAF 6 GeV electron beam, and revealing an unexpected and challenging physical behaviour. The 2014 scheduled 12 GeV upgrade will allow the measurement of G(E)(p)/G(M)(p) up to Q(2) approximate to 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. (C) 2010 Elsevier Ltd. All rights reserved.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/33660
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