Swapan Das
Articles written in Pramana – Journal of Physics
Volume 61 Issue 5 November 2003 pp 1015-1019
Low energy
The data for the total cross-section of
Volume 66 Issue 5 May 2006 pp 947-952
(γ, π0γ) reaction on a nucleus in the GeV region
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
Volume 75 Issue 4 October 2010 pp 665-674 Research Articles
$\omega (\rightarrow \pi^{+} \pi^{-} \pi^{0})$ meson photoproduction on proton
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.
Volume 96, 2022
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