Weak Chiral Lagrangian and $pi^+$ Emission in ${}^4_{Lambda}$He
A new mechanism of $pi^+$ meson emission from the ${}^4_{Lambda}$He hypernucleus is suggested.
nucl-th↗
arXiv subjects
M. Shmatikov
Publications and source records attributed to M. Shmatikov.
Pion Correlations and Two-Particle Bound States
A method to investigate possible loosely bound dibaryon states is suggested. The momentum dependence of a two-pion correlation function is shown to depend on the (non)existence of a bound state.
nucl-th↗
Quarkonium Mass Splitting Revisited: Effects of Closed Mesonic Channels
Modifications of the mass spectrum the quarkonium induced by its virtual dissociation into a pair of heavy mesons is considered. Coupling between quark and mesonic channels results in noticeable corrections to spin-dependent mass splitting. In particular, the observable hierarchy of mass splittings in the $χ_c, χ_b$ and $χ'_b$ multiplets is reproduced.
hep-ph↗
Heavy-flavored strange pentaquark seems not to exist
Possible existence of a molecular-type heavy-flavored strange pentaquark is considered. No narrow state of such a type is shown to exist.
hep-ph↗
On the width of molecular states
Width of molecular-type $Q\bar{Q}q\bar{q}$ hadronic states is discussed. It depends on the quantum numbers of the state and on the details of the long-range mechanism ensuring the bindedness of a molecule. Specific cases when the width is large are considered in detail.
hep-ph↗
Hadronic molecules: meson-baryon hybrids
The existence of hadronic molecular-type hybrids consisting of a baryon and a meson is argued. Long-range interactions due to one-pion exchange is shown to be strong enough to produce a loosely bound state. Specific features of a molecular hybrid are discussed.
hep-ph↗
${\bar p} p$ Annihilation: Manifestations of Instanton Induced Quark Pair Production ?
Production of strangeness in the low-energy ${\bar p} p$ annihilation is analyzed as a manifestation of the instanton induced multiquark vertex. Approach based on the {\it qualitative} properties of the 't Hooft mechanism provides a unified description of available experimental data on $K$- and $ϕ$-meson production. Crucial tests for the hypothesized mechanism are suggested.
hep-ph↗