24 research outputs found
Tetraquarks as Diquark Antidiquark Bound Systems
In this paper, we study four-body systems consisting of diquark antidiquark,
and we analyze diquark-antidiquark in the framework of a two body (pseudo
point) problem. We solve Lippman Schwinger equation numerically for charm
diquark antidiquark systems and find the eigenvalues to calculate the binding
energies and masses of heavy tetraquarks with hidden charms. Our results are in
good agreement with theoretical and experimental data
The BFT Method With Chain Structure
We have constructed a modified BFT method that preserves the chain structure
of constraints. This method has two advantages: first, it leads to less number
of primary constraints such that the remaining constraints emerge
automatically; and second, it gives less number of independent gauge
parameters. We have applied the method for bosonized chiral Schwiger model. We
have constructed a gauge invariant embedded Lagrangian for this model.Comment: To appear in Phys. Lett.
Finite Order BFFT Method
We have proposed a method in the context of BFFT approach that leads to
truncation of the infinite series regarded to constraints in the extended phase
space, as well as other physical quantities (such as Hamiltonian). This has
been done for cases where the matrix of Poisson brackets among the constraints
is symplectic or constant. The method is applied to Proca model, single self
dual chiral bosons and chiral Schwinger models as examples.Comment: 14 pages, no figure to appear in Int. J. of Mod. Phys.
Calculating Masses of Pentaquarks Composed of Baryons and Mesons
We consider an exotic baryon (pentaquark) as a bound state of two-body systems composed of a baryon (nucleon) and a meson. We used a baryon-meson picture to reduce a complicated five-body problem to simple two-body problems. The homogeneous Lippmann-Schwinger integral equation is solved in configuration space by using one-pion exchange potential. We calculate the masses of pentaquarks θc(uuddc¯) and θb(uuddb¯)