Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-01-28
Phys.Atom.Nucl. 67 (2004) 773-803; Yad.Fiz. 67 (2004) 794-824
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages
Scientific paper
10.1134/1.2053340
The Bethe--Salpeter equations for the quark-antiquark composite systems with different quark masses, such as $q\bar s$ (with $q=u$,$d$), $q\bar Q$ and $s \bar Q$ (with $Q=c$,$b$), are written in terms of spectral integrals. For the mesons characterized by the mass $M$, spin $J$ and radial quantum number $n$, the equations are presented for the $(n,M^2)$-trajectories with fixed $J$. In the spectral-integral technique one can use the energy-dependent forces and get beyond instantaneous approximation. The mixing between states with different quark spin $S$ and angular momentum $L$ are also discussed.
Anisovich A. V.
Anisovich V. V.
Markov Vladimir N.
Matveev M. A.
Sarantsev A. V.
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