M P Khanna
Articles written in Pramana – Journal of Physics
Volume 8 Issue 1 January 1977 pp 56-67 Nuclear And Particle Physics
Parity violating non-leptonic decays of hyperons and of charmed baryons in SU (8)
The parity violating non-leptonic decays of hyperons and of charmed baryons are discussed in the framework of SU (8) symmetry. Several relations in addition to the ones obtained earlier by using SU (4) symmetry and
Volume 8 Issue 4 April 1977 pp 309-314 Nuclear And Particle Physics
Decays of the mesons and the singlet photon
In an attempt to explain the recent measurements on the radiative decays of the vector-mesons (
Volume 8 Issue 5 May 1977 pp 462-470 Nuclear And Particle Physics
Magnetic moments of baryons in higher symmetry schemes including charm
Relations among the magnetic moments of charmed and uncharmed baryons are derived in the framework of SU(4) and SU(8) symmetries. The SU(3) result
Volume 8 Issue 6 June 1977 pp 524-532 Nuclear And Particle Physics
SU (8) mass relations among
Mass relations among charmed and uncharmed baryons belonging to
Volume 9 Issue 6 December 1977 pp 643-652 Nuclear And Particle Physics
Adjoint representation admixture to weak nonleptonic decays in SU(4) and SU(8)
In order to remove some of the unsatisfactory features of the GIM model, we consider
Volume 11 Issue 3 September 1978 pp 333-351 Particle Physics
Charm changing weak decays 1/2^{+} → 3/2^{+} + 0^{−}/γ in SU(4) and SU(8)_{w}
Weak decay modes (1/2^{+} → 3/2^{+} + 0^{−}/γ) of charmed baryons are studied. Relations among the various decay amplitudes are derived in isospin, SU(3), SU(4) and SU(8)_{w} symmetries. Sextet dominance in SU(3) forbids
Volume 13 Issue 3 September 1979 pp 261-268 Nuclear and Particle Physics
Magnetic moments of baryons in broken SU(4)
C P Singh Ramesh C Verma M P Khanna
Assuming that the anomalous magnetic moment interaction has the form
Volume 14 Issue 6 June 1980 pp 433-438 Nuclear And Particle Physics
Quark model predictions on the masses of heavier vector mesons
C P Singh Satish Kanwar M P Khanna
We use the quark model considerations of Federman, Rubinstein and Talmi and the relation (
Volume 16 Issue 3 March 1981 pp 249-255 Particle Physics
Symmetry breaking for the
Jatinder K Bajaj M P Khanna K Prema
Using the consistency requirements arising from the Coleman-Glashow null result for ‘tadpole’-type symmetry-breaking, we obtain a simple method of accounting for the SU(3) symmetry-breaking at the
Volume 16 Issue 6 June 1981 pp 487-492 Particle Physics
Masses of charmed and
C P Singh Avinash Sharma M P Khanna
Employing non-relativistic quasinuclear coloured quark model, which provides a unified description of mesons and baryons, masses of charmed and
Volume 21 Issue 4 October 1983 pp 241-246
Baryon magnetic moments in quark-diquark model
The baryon magnetic moments in quark-diquark model are studied and it is found that the diquark (spin 1 and 0) mixing which may arise as a result of quarkgluon interaction inside a hadron, leads to a good agreement of theory with experiment.
Volume 23 Issue 1 July 1984 pp 109-118 Particle Physics
Nonleptonic decay matrix elements in the variable pressure bag model
The consequences of the variable pressure bag model for the nonleptonic decays of hyperons and Ω^{−} are investigated. Though the order of magnitude and the relative sign for the various decay amplitudes are correctly reproduced, the overall results are small by a factor of 2 to 4, indicating that the theoretical predictions are strongly dependent on the model parameters.
Volume 24 Issue 4 April 1985 pp 619-628 Particle Physics
Ground state baryon magnetic moments and nucleon axial vector coupling
Ground-state baryon magnetic moments and nucleon axial vector coupling are calculated using
Volume 41 Issue S1 July 1993 pp 217-233 Heavy Flavour Physics
Flavour-spin symmetry and weak decays of heavy hadrons
Recent developments in the theory of heavy quarks have increased the prospects for the study of non-perturbative QCD in the weak decays of heavy mesons and baryons and for the reliable determination of some of the parameters of the Standard Model. It has been made possible due to the discovery of a spin-flavour symmetry for heavy quarks which arises in QCD when quark mass is taken to infinity. Certain properties in hadrons containing a heavy quark then become independent of its mass and spin. These ideas have tremendous impact on the phenemenology of heavy hadrons. In particular, these symmetries give rise to restrictive relations among weak decay amplitudes and reduce the number of independent form factors. By relating various matrix elements and fixing normalization of some matrix elements, the heavy quark symmetry has enhanced our predictive ability, allowing in some cases to bypass the difficulties of understanding hadronic structure.
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