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9 papers · 2 filters
Access to decoupled information on Generalized Parton Distributions (GPDs) via Double Deeply Virtual Compton Scattering (DDVCS)
Shengying Zhao
The Generalized Parton Distributions (GPDs) constitute an appropriate framework for a universal description of the partonic structure of the nucleon. Double Deeply Virtual Compton…
Tetraquark Properties at Large
Wolfgang Lucha, Dmitri Melikhov, Hagop Sazdjian
Considering quantum chromodynamics in the consistent limit of simultaneous correlated increase of the number of colours, , beyond bounds and decrease of the strong coupl…
Multiquark-Adequate QCD Sum Rules: the Case of Flavour-Exotic Tetraquarks
Wolfgang Lucha, Dmitri Melikhov, Hagop Sazdjian
Frequently, theoretical discussions of multiquark hadron states prove to be contaminated or even dominated by contributions of conventional hadrons. For the approach to QCD bound s…
Tetraquark-adequate QCD sum rules for quark-exchange processes
Wolfgang Lucha, Dmitri Melikhov, Hagop Sazdjian
We consider quark-hadron duality relations and QCD sum rules for correlators involving exotic tetraquark currents, here specializing to the case of quark-exchange processes. We poi…
Bound states of relativistic nature
V. A. Karmanov, J. Carbonell, H. Sazdjian
Bethe-Salpeter equation, for massless exchange and large fine structure constant , in addition to the Balmer series, provides another (abnormal) series of energy levels whic…
Baryon-number violation by two units and the deuteron lifetime
F. Oosterhof, B. Long, J. de Vries +2
We calculate the lifetime of the deuteron with dimension-nine quark operators that violate baryon number by two units. We construct an effective field theory for interacti…