Articles written in Pramana – Journal of Physics
Volume 41 Issue S1 July 1993 pp 427-439 Non Accelerator Particle Physics
It is well known that baryon (lepton) number is not conserved in the standard electroweak theory due to the anomaly. As a consequence, the electroweak phase transition provides plausible ground for producing the baryon number asymmetry of the universe, besides erasing any prexisting asymmetry. This occurs via processes which surmount the instanton potential barrier. The barrier is given by the static saddle point solution of the electroweak theory, called the sphaleron, which we shall briefly expose. This is followed by a pedagogical account of how the asymmetry can be created during the electroweak phase transition including the pitfalls that await the innocent practitioner.
Volume 51 Issue 1-2 July 1998 pp 273-286
Subhendra Mohanty Varun Sahni S Chakraborty Ashok Goyal Sukanta Dutta Debajyoti Choudhury Shobhit Mahajan Amitabha Mukherjee Hatem Widyan Urjit Yajnik S Mohanty J A Grifols Uma Mahanta Sarira Sahu Varun Sahni Tarun Souradeep Albert Stebbins Ioav Waga Vikram Soni N Panchapakesan R Brandenberger
The astroparticle physics working group witnessed intense discussion and activity covering a broad range of topics ranging from supergravity and baryogenesis to compact stars and the large scale structure of the Universe. A summary of some of the subject areas in which collaborations were initiated during WHEPP-5 is presented below.
Volume 59 Issue 2 August 2002 pp 375-383
We consider the modification of a single-particle Schrödinger equation by the inclusion of an additional gravitational self-potential term which follows from the prescription that the ‘massdensity’ that enters this term is given by
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