B K Jain
Articles written in Pramana – Journal of Physics
Volume 57 Issue 2-3 August 2001 pp 233-234
Volume 61 Issue 5 November 2003 pp 1001-1008
We report on the study of meson and resonance production in nuclear collisions near the threshold. Because of the large momentum transfer, these reactions occur at length scales less than the size of the hadrons. We explore whether they are best described in terms of the quark-gluon picture or the meson-exchange picture. Comparing our results with the available experimental data we conclude that the spin-averaged cross-sections are best described in meson-exchange picture. The description of the observed nucleon-nucleus and hyperon-nucleus spin-orbit potentials are found to be consistent with the quark-gluon exchange picture.
Volume 66 Issue 4 April 2006 pp 753-764
Final state interaction effects in
Volume 66 Issue 4 April 2006 pp 791-796
We locate resonances in
Volume 83 Issue 5 November 2014 pp 749-759
The presence of a resonance close to the threshold strongly effects the dynamics of the interacting particles at low energies. Production of 12C, the element for life, in 4He burning in Sun is a classic example of such a situation. In intermediate energy nuclear physics, this situation arises in the interactions of an 𝜂-meson with a nucleon and that of a $K^−$-meson with a proton at low energies, where both these systems have a resonance or a bound state near their thresholds, resulting in a strong attractive interaction. If putting these mesons in nuclear environment produces a strong attraction, it is possible that, in nature there may exist 𝜂- and $K^−$-nuclear bound states. Such a tantalizing possibility has led to experimental and theoretical programmes to search for them. These efforts have produced positive results. This paper gives a brief critical overview of these studies, emphasizing especially the efforts led by Bhabha Atomic Research Centre (BARC).