M B Singh
Articles written in Proceedings – Section A
Volume 68 Issue 4 October 1968 pp 209-217
The coherent production of pions at 17·2 GeV in pion interactions with nuclei has been studied using Nuclear Emulsion Technique. The kinematical selection of such events was made out of three prong events in which all the prongs were identified as pions. The mean free path of coherent events was 65 meters. It was found that diffraction dissociation takes place with lighter nuclei, whereas the Coulomb dissociation plays a major role in the case of heavier emulsion nuclei.
Volume 68 Issue 5 November 1968 pp 228-243
Binding energy values of hyperfragments from a sample of 541 uniquely identified mesic decays with mass numbers A=3 to 14 are presented. There does not seem to be any detectable difference in the binding energy value of Λ inAH4 obtained from its two-body and three-body decay modes. Within statistical error, the binding energy values of Λ inAH4 andAH4 are also the same. From a sample of 2
Volume 69 Issue 2 February 1969 pp 78-87
A new method of obtaining the charge spectrum of light hyperfragments from their residual range distribution is described. This method has been used to determine the ratio (Q−) of non-mesic to π−-mesic decay of light hyperfragments. The values of Q− for hyperfragments of different charges are found to be in good agreement with theoretical calculations of Dalitz.
Volume 71 Issue 1 January 1970 pp 32-41
An attempt has been made to detect narrow resonant states ofΛHe5* (I = 2),ΛLi6 andΛBe9* (I = 1) from amongst a sample of 128 uniquely identifiedΛH4 and 195 uniquely identifiedΛHe5 hypernuclei produced by stopping Krmesons in a nuclear emulsion stack. From the experimental data presented, it is concluded that the production of any of these resonant states is not appreciable; upper limits of 20% and 15% are set for the proportion ofΛHe5 resulting from the decay ofΛLi6 andΛBe9* respectively.
Volume 71 Issue 3 March 1970 pp 101-110
From an analysis of 468 hypernuclei (HFs) with ranges > 120 μm, the non-mesic to π−-mesic ratio (Q−) forΛHe andΛHe5 HFs was found to be 1.37 ±0.17 and 1.58
Volume 71 Issue 6 June 1970 pp 257-265
The excited states of Li4, Li5 and Be8 have been investigated by studying the final state interactions in the π−-mesic decays ofΛHe4,ΛHe5 andΛLi8 respectively. The experimental results indicate the existence of final states like Li5* at 1·8 MeV and Be8* at 0 and 2·9 MeV to be dominant in the decay ofΛHe5* andΛLi8 respectively; the results on the decay ofΛHe4 suggest the presence of a Li4* state at about 4 MeV to dominate.