R Parthasarathy
Articles written in Pramana – Journal of Physics
Volume 13 Issue 5 November 1979 pp 457-473 Nuclear And Particle Physics
Effect of correlations on nuclear muon capture
The process μ^{−}+^{12}C→^{12}B+
As far as the partial capture rate is concerned the use of the unitary-model operator approach wave functions for^{12}C with
The^{12}B(1^{+}; g.s) recoil polarisation is found to be insensitive to the use of the unitary-model-operator-approach wave functions. When compared with the experimental data, we obtain
The total capture rate is found to be sensitive to the use of the unitary-modeloperator-approach wave functions which contain the effect of nucleon-nucleon short range correlations and we obtain a satisfactory agreement with the experiment for^{16}O and^{12}C, thereby revealing the importance of the effect of such correlations in the total capture rate studies.
Volume 22 Issue 6 June 1984 pp 513-521 Nuclear Physics
Muon capture by^{16}O—using a microscopic theory of particle-hole states
V N Sridhar R Parthasarathy Y R Waghmare
The partial capture rates for the process,
Volume 24 Issue 3 March 1985 pp 457-460 Particle Physics
On the classical solution of SO(3) gauge theory and ’t Hooft-Polyakov monopole
R Parthasarathy T S Santhanam K H Mariwalla
It is shown that the ansatz for the asymptotic (
Volume 26 Issue 6 June 1986 pp 477-480
Spectral asymmetry of Dirac Hamiltonian in a five-dimensional Kaluza-Klein theory
It is shown that the fermion number in a five-dimensional Kaluza-Klein theory (M^{4}×S^{1}) in which the fermion is interacting with a monopole field, is quantized in units of (ϕR)^{2} where the scalar ϕ is asymptotically constant and
Volume 32 Issue 4 April 1989 pp 563-572 Sub-Nuclear Physics
Gribov ambiguity in gauge theories
Gribov ambiguity in gauge field theories is discussed and it is shown that such an ambiguity exists even for Abelian theories in covariant gauge at finite temperature. Both geometric and algebraic proofs are presented. In view of the importance of non-perturbative methods, some special gauges are given in which such ambiguities do not exist or are not relevant. The significance of these in the study of confinement in QCD is pointed out.
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