5 papers
Perturbation theory for a systematic account of the bound-state motion
Alexander N. Kvinikhidze, Hagop Sazdjian, Boris Blankleider
We derive a perturbation theory (PT) for the Lorentz boost operator in the space of two-nucleon wave functions. The latter is expressed in terms of the nucleon-nucleon () poten…
Meson scattering and tetraquarks in two-dimensional QCD
Hagop Sazdjian
Two-quark--two-antiquark systems with four different quark flavors are considered in the framework of two-dimensional QCD, in the light-cone gauge, at leading orders of the $1/N_c^…
Scattering of mesons and emergence of tetraquarks in two-dimensional QCD
Hagop Sazdjian
Scattering of two mesons is considered in the framework of two-dimensional QCD in the large- limit with four different quark flavors. The scattering takes place through two…
Abnormal solutions of Bethe--Salpeter equation with massless and massive exchanges
Jaume Carbonell1, Vladimir Karmanov, Ekaterina Kupriyanova +1
We summarize the main properties of the so called ''abnormal solutions'' of the Wick--Cutkosky model, i.e. two massive scalar particles interacting via massless scalar exchange ("p…
Structure and EM form factors of purely relativistic systems
V. A. Karmanov, J. Carbonell, H. Sazdjian
The Bethe-Salpeter equation for two massive scalar particles interacting by scalar massless exchange has solutions of two types, which differ from each other by their behavior in t…