Decay angular distributions of $K^{\ast }$ and $D^{\ast }$ vector mesons in pion-nucleon scattering

Abstract

The production mechanisms of open strangeness ($K^{\ast }$) and open charm ($D^{\ast }$) vector mesons in ${\pi }^{-}p$ scattering, namely, ${\pi }^{-}+p\to K^{\ast 0}+\Lambda$ and ${\pi }^{-}+p\to D^{\ast -}+{\Lambda }_c^{+}$, are investigated within the modified quark-gluon string model. In order to identify the major reaction mechanisms, we consider the subsequent decays of the produced vector mesons into two pseudoscalar mesons, i.e., $K^{\ast }\to K+\pi$ and $D^{\ast }\to D+\pi$. We found that the decay distributions and density matrix elements are sensitive to the production mechanisms and can be used to disentangle the vector trajectory and pseudoscalar trajectory exchange models. Our results for $K^{\ast }$ production are compared with the currently available experimental data and the predictions for $D^{\ast }$ production processes are presented as well. Our predictions can be tested at the present or planned experimental facilities.

10 pages, 9 figures, REVTeX

References in corpus (6)

• Heavy quarkonium: progress, puzzles, and opportunities
• Charmed-Meson Fragmentation Functions with Finite-Mass Corrections
• The total charm cross section
• Exclusive charm production in pbar p collisions at s^1/2 <15 GeV
• Production of strange and charmed baryons in pion induced reactions
• $K^0\Lambda$ and $D^{-}{\Lambda }_c^{+}$ production induced by pion beams off the nucleon

Cited by in corpus (3)

• Production of hidden-charm strange pentaquarks $P_{cs}$ from the $K^{-}p\to J/\psi \Lambda$ reaction
• Studying triangle singularity through spin observables
• Decay angular distributions of $K^{\ast }$ and $D^{\ast }$ mesons as a tool for the dynamics of open strange and charm production