Sum rules and dualities for generalized parton distributions : is there a holographic principle? (CROSBI ID 145999)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Kumerički, Krešimir ; Müller, Dieter ; Passek-Kumerički, Kornelija
engleski
Sum rules and dualities for generalized parton distributions : is there a holographic principle?
To leading order approximation, the physical content of generalized parton distributions (GPDs) that is accessible in deep virtual electroproduction of photons or mesons is contained in their value on the cross-over trajectory. This trajectory separates the t-channel and s-channel dominated GPD regions. The underlying Lorentz covariance implies a correspondence between these two regions through their relation to GPDs on the cross-over trajectory. This point of view leads to a family of GPD sum rules which are a quark analogue of finite energy sum rules and it guides us to a new phenomenological GPD concept. As an example, we discuss the constraints from the JLab/Hall A data on the dominant u-quark GPD H. The question arises whether GPDs are governed by some kind of holographic principle.
generalized parton distributions ; deeply virtual Compton scattering ; sum rules ; duality
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
Podaci o izdanju
58 (2)
2008.
193-215
objavljeno
1434-6044
10.1140/epjc/s10052-008-0741-0