4 papers
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^…
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…
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…