Deep exclusive {pi}{sup +} electroproduction off the proton at CLAS
The exclusive electroproduction of {pi}{sup +} above the resonance region was studied using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Laboratory by scattering a 6 GeV continuous electron beam off a hydrogen target. The large acceptance and good resolution of CLAS, together with the high luminosity, allowed us to measure the cross section for the {gamma}* p {yields} n {pi}{sup +} process in 140 (Q{sup 2}, x{sub B}, t) bins: 0.16<x{sub B}<0.58, 1.6 GeV{sup 2}<Q{sup 2}<4.5 GeV{sup 2} and 0.1 GeV{sup 2}<-t<5.3 GeV{sup 2}. For most bins, the statistical accuracy is on the order of a few percent. Differential cross sections are compared to two theoretical models, based either on hadronic (Regge phenomenology) or on partonic (handbag diagram) degrees of freedom. Both can describe the gross features of the data reasonably well, but differ strongly in their ingredients. If the handbag approach can be validated in this kinematical region, our data contain the interesting potential to experimentally access transversity Generalized Parton Distributions.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 1067325
- Report Number(s):
- JLAB-PHY-12-1608; DOE/OR/23177-2234; arXiv:1206.2326
- Journal Information:
- The European Physical Journal A, Vol. 49
- Country of Publication:
- United States
- Language:
- English
Similar Records
Deeply virtual and exclusive electroproduction of omega mesons
Exclusive Electroproduction of meson rho on the nucleon Virtualite Intermediate With the CLAS Detector at Jlab; Electroproduction Exclusive de meson rho sur le nucleon Virtualite Intermediaire Avec le Detecteur CLAS at Jlab