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On the interplay between Q^2 and t dependence in exclusive diffractive production of real photons and vector mesons in ep collisions Fiore, Roberto Jenkovszky, Lázsló L. Lavorini, A. Magas, Volodymyr Física nuclear Partícules (Física nuclear) Fotons Col·lisions (Física nuclear) Nuclear physics Particles (Nuclear physics) Photons Collisions (Nuclear physics) We show how the familiar phenomenological way of combining the Q2 (photon virtuality) and t (squared momentum transfer) dependences of the scattering amplitude in Deeply Virtual Compton Scattering (DVCS) [1, 2] and Vector Meson Production (VMP) [2] processes can be understood in an off-mass-shell generalization of dual amplitudes with Mandelstam analyticity [3]. By comparing different approaches, we managed also to constrain the numerical values of the free parameters. 2014-02-27T08:08:59Z 2014-02-27T08:08:59Z 2012 2014-02-27T08:08:59Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: http://www.ujp.bitp.kiev.ua/index.php?item=j&id=158 Ukrainskii Fizicheskii Zhurnal, 2012, vol. 57, num. 12, p. 1197-1204 (c) Fiore, Roberto et al., 2012 info:eu-repo/semantics/openAccess Bogolyubov Institute for Theoretical Physics, National Academy of Science of Ukraine Articles publicats en revistes (Física Quàntica i Astrofísica)