N. Achasov

activity

19971999

collaborators

5 papers

hep-ph1999

Chiral dynamics of many pion systems: the rho to 4 pi and omega to 5 pi decays

N. N. Achasov, A. A. Kozhevnikov

Based on the Weinberg lagrangian or, in a new language, the lagrangian of hidden local symmetry added with the term induced by the anomalous lagrangian of Wess and Zumino, the dyna…

hep-ph1999

Exclusive hadron production in e^+e^- collisions up to the J/psi energy

N. N. Achasov, A. A. Kozhevnikov

The predictions are presented for the diagonal and transition form factors of light hadrons in the time-like region up to the production threshold of an open charm quantum number.…

hep-ph1999

Two-Photon Production of Four-Quark States Up to the $J / ψ$ Energy

N. N. Achasov, G. N. Shestakov

Evidence for an explicitly exotic state with isospin 2 and spin-parity 2^+ near the $ρρ$ threshold and nontrivial complementary indications of the unusual quark composition of the…

hep-ph1998

Nature of the scalar $a_{0} (980)$ and $f_{0} (980)$ -mesons

N. N. Achasov

It is presented a critical consideration of all unusual properties of the scalar $a_{0} (980)$ and $f_{0} (980)$ -mesons in the four-quark, two-quark and molecular models. The arguments a…

hep-ph1997

Mechanisms of the Reaction $π^{-} p \to a_{0}^{0} (980) n \to π^{0} η n$ at High Energies

N. N. Achasov, G. N. Shestakov

Over the last twenty years, it was assumed that the reaction $π^{-} p \to a_{0}^{0} (980) n \to π^{0} η n$ at high energies is dominated by $b_{1}$ Regge pole exchange. We show that the new Brookhav…

Chiral dynamics of many pion systems: the rho to 4 pi and omega to 5 pi decays

Exclusive hadron production in e^+e^- collisions up to the J/psi energy

Two-Photon Production of Four-Quark States Up to the J/ψ Energy

Nature of the scalar a0​(980) and f0​(980)-mesons

Mechanisms of the Reaction π−p→a00​(980)n→π0ηn at High Energies

Two-Photon Production of Four-Quark States Up to the $J / ψ$ Energy

Nature of the scalar $a_{0} (980)$ and $f_{0} (980)$ -mesons

Mechanisms of the Reaction $π^{-} p \to a_{0}^{0} (980) n \to π^{0} η n$ at High Energies