Abstract
In this paper we analyze in detail how the measurements of exclusive electroproduction of mesons on neutrons would complement the studies of generalized parton distributions (GPDs) of the proton, providing independent experimental observables. Some of these processes on neutrons have very distinctive features, and thus we expect that measurements on liquid deuterium would allow to clearly distinguish them from similar processes on protons, giving a very clean probe of the GPD. In the case of charged meson production, all produced hadrons are charged, and for this reason we expect that the kinematics of this process could be easily reconstructed. We estimate the cross-sections in the kinematics of the Jefferson Laboratory experiments using current phenomenological GPD models.
Highlights
Understanding the structure of the hadrons nowadays is one of the major goals of high energy physics, and it occupies a central place in the program of modern accelerator facilities
This structure is parametrized in terms of the so-called generalized parton distributions (GPDs) which can be studied in Bjorken kinematics in a wide class of processes [1,2]
While the number of processes which can be used for studies of GPDs is rather large [3,4,5,6,7,8,9,10,11], the precision analyses are currently performed with deeply virtual Compton scattering (DVCS) [12,13,14,15,16,17,18,19] and deeply virtual production of light mesons (DVMP) [20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43], with most of the existing studies focusing on proton targets or production off protons inside nuclei
Summary
Understanding the structure of the hadrons nowadays is one of the major goals of high energy physics, and it occupies a central place in the program of modern accelerator facilities Today, this structure is parametrized in terms of the so-called generalized parton distributions (GPDs) which can be studied in Bjorken kinematics in a wide class of processes [1,2]. Some of the processes on neutrons have distinctive features, and for this reason their measurement on liquid deuterium potentially provides a very clean channel for study of GPDs. As will be explained, the neutron GPDs either allow to probe new flavor combinations, or when contribute to the same combinations as on the proton, have better sensitivity to the region of negative light-cone fractions x, usually attributed to sea quarks. III we present numerical results using currently available models of GPDs, and draw conclusions
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