https://dspace.imsc.res.in/xmlui/handle/123456789/623 Collected Works Tue, 06 Oct 2026 04:07:02 GMT 2026-10-06T04:07:02Z https://dspace.imsc.res.in/xmlui/handle/123456789/839 Introduction to String Theories Rajasekaran G. Fri, 01 Jan 1988 00:00:00 GMT https://dspace.imsc.res.in/xmlui/handle/123456789/839 1988-01-01T00:00:00Z https://dspace.imsc.res.in/xmlui/handle/123456789/827 Large neutrino mixing angles for type-I see-saw mechanism in SO(100 GUT Bipin.R.Desai.; Rajasekaran G.; Utpal Sarkar We consider the neutrino mixing angles in an SO(10) GUT with the usual Higgs structure in which neutrino masses are explained by the type-I see-saw mechanism. The Dirac-neutrino Yukawa matrix then has a structure similar to that of the u-quark. We determine the light neutrino mass matrix through type-I see-saw mechanism using the experimentally consistent u-quark Yukawa matrix. We find that large neutrino mixing-angles emerge naturally in this model. Sat, 01 Jan 2005 00:00:00 GMT https://dspace.imsc.res.in/xmlui/handle/123456789/827 2005-01-01T00:00:00Z https://dspace.imsc.res.in/xmlui/handle/123456789/836 Generalized Fock Spaces and New Forms of Quantum Statistics Rajasekaran G. The recent discoveries of new forms of quantum statistics require a close look at the under-lying Fock space structure. This exercise becomes all the more important in order to provide a general classification scheme for various forms of statistics, and establish interconnections among them whenever it is possible. We formulate a theory of generalized Fock spaces, which has a three tired structure consisting of Fock space, statistics and algebra. This general formalism unifies various forms of statistics and algebras, which were earlier considered to describe different systems. Besides, the formalism allows us to construct many new kinds of quantum statistics and the associated algebras of creation and destruction operators. Some of these are: orthostatistics, null statistics or statistics of frozen order, quantum group based statistics and its many avatars, and ‘doubly-infinite’ statistics. The emergence of new forms of quantum statistics for particles interacting with singular potential is also highlighted. Sun, 01 Jan 1995 00:00:00 GMT https://dspace.imsc.res.in/xmlui/handle/123456789/836 1995-01-01T00:00:00Z https://dspace.imsc.res.in/xmlui/handle/123456789/832 HEP research in the Indian context - Reply Rajasekaran G.; Ramachandran R. Wed, 01 Jan 1997 00:00:00 GMT https://dspace.imsc.res.in/xmlui/handle/123456789/832 1997-01-01T00:00:00Z