Production of strange and charmed baryons in pion induced reactions

TL;DR

This paper compares theoretical models to predict strangeness and charm baryon production in pion-induced reactions, finding charm production is significantly suppressed and the Regge approach aligns well with experimental data.

Contribution

It introduces a comparative analysis of effective Lagrangian and Regge models for baryon production, highlighting the suppression of charm relative to strangeness and validating the Regge approach against data.

Findings

Charm production cross section is 10^3 to 10^6 times smaller than strangeness.

Regge approach effectively explains experimental data across energies.

Coupling constants for charm are assumed equal to those for strangeness.

Abstract

We study the strangeness and charm productions induced by the pion beam, i.e. the $\pi^-$p $\rightarrow$ $K^{*0}\Lambda$ and $\pi^-$p $\rightarrow$ $D^{*-}\Lambda_c^+$ reactions, based on two different theoretical frameworks: an effective Lagrangian method and a Regge approach. In order to estimate the magnitude of the charm production relative to that of the strangeness production, we assume that the coupling constants for the charmed meson and baryon vertices are the same as those for the strangeness channel. We found that the total cross section for the charm production was about $10^3 - 10^6$ times smaller than that for the strangeness production, depending on theoretical approaches and kinematical regions. We also discuss each contribution to observables for both reactions. In general, the Regge approach explains the experimental data very well over the whole energy region.