The data for the total cross-section ofK⁺ scattering on various nuclei have been analysed in the Glauber multiple scattering theory. Energy-dependentK⁺-nucleus optical potential is generated using the forwardK⁺-nucleon scattering amplitude and the nuclear density distribution. Along with this, the calculated totalK⁺-nucleus cross-sections using the effectiveK⁺-nucleon crosssection inside the nucleus are also presented.

π⁰γ invariant mass distribution spectrum has been calculated for the (γ, π⁰γ) reaction on¹²C nucleus at 2.5 GeV beam energy. These π⁰ and γ are assumed to originate due to the decay of vector mesons produced in the photonuclear reaction. The nuclear medium effect on vector mesons and the effect of π⁰ rescattering on the π⁰γ invariant mass spectrum have been investigated

The cross-section for the $\pi^{+} \pi^{-} \pi^{0}$ invariant mass distribution in the $\gamma p$ reaction in the GeV region is calculated. This reaction is assumed to proceed through the formation of the 𝜔-meson in the intermediate state, because the production cross-section for this meson in the $\gamm p$ reaction in the GeV region is significant and it has a large branching ratio (88.8%) in the $\pi^{+} \pi^{−} \pi^{0}$ channel. The cross-sections for this reaction are calculated using the energy-dependent reaction amplitude, $f_{\gamma p \rightarrow \omega p (0)$, extracted from the latest 𝜔-meson photoproduction data. We use established procedure to calculate other factors, like width and propagator of the 𝜔-meson, so that our calculation can provide reliable cross-section. The calculated results reproduce the measured $\pi^{+} \pi^{-} \pi^{0}$ invariant mass distribution spectra in the $\gamma p$ reaction.