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Nondiagonal DVCS as a Restorable Component of GPDs in Meson and Nucleon Analysis

This paper discusses the role of nondiagonal Deeply Virtual Compton Scattering (DVCS) in understanding Generalized Parton Distributions (GPDs), emphasizing its relationship with mesons and nucleons. It covers the impact of additional variables in characterizing mesons and presents a classification of GPDs relevant to nucleon interactions. The advantage of utilizing QCD strings to probe and excite exotic baryons is examined, with specific attention to the new narrow nucleon state (N*(1685)) revealed in eta photoproduction. The research highlights the dynamics of quark interactions and strong color fields.

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Nondiagonal DVCS as a Restorable Component of GPDs in Meson and Nucleon Analysis

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  1. is

  2. Nondiagonal DVCS

  3. b a

  4. Restorable part of GPD is contained in M.V.P. ´07 A. Moiseeva+MVP ´08 Vanderhaeghen+MVP´08

  5. Additional variables charachterizing meson +N See classification of N->meson +N GPDs In /Stratmann, MVP ´06/

  6. photon is hard

  7. Advantage of QCD strings to excite exotic baryons Hard photon removes a quark from N at once The quark returns back New Narrow Nucleon N*(1685) Revealed in eta photoproduction /Kuznetsov, MVP, JETP Lett. 88 (2008) 399/ Strong colour field Strong reararngenemt of colour

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