AR-2020-21

269 33 rd ANNUAL REPORT 2020-21 Department of Physics, Gurukula Kangri University, Haridwar (Coordinator: Hemwati Nandan) Areas of Research Lectures Publications using ICARDFacilities · Classical Gravity · Cosmology The physics of two particles with different energies colliding near the horizon of a static spherically symmetric black hole is explored in view of the Bañados, Silk, andWest (BSW) scenario. Surprisingly, we observed that even for the static spherically symmetric (i.e., Schwarzschild like) black holes, it is possible to obtain an arbitrarily high centre of mass energy from the two test particles colliding near the horizon of a black hole, if one fine-tunes the parameters of geodesicmotion . The connection between gravitational dynamics of the horizon and thermodynamics for the case of charged radiating rotating axially symmetric black holes is studied in detail, and it is shown that Einstein field equations near apparent horizon can be interpreted in the formof thermodynamic laws . ission, Government of India, byArvind Ranade (Vigyan Prasar, NewDelhi). · The physics of stars , byT. R. Seshadri, (University of Delhi). · The ultimate cosmic chakravyuh: Black holes , by PatrickD. Gupta (University of Delhi). · Gravitation interaction in daily life situations, by Padma Sri Professor H. C. Verma, (Formerly from IIT, Kanpur). · Recent discoveries in gravity and cosmology, byM. Sami, (CTP, JMI, NewDelhi). · Eva Hackmann, Hemwati Nandan, and Pankaj Sheoran (2020) Particle collisions near static · · Adityam spherically symmetric black holes, PhLB, 810, 135850. Uma Papnoi, and Sushant G. Ghosh (2020) Thermodynamics from field equations for charged radiating rotating black hole near horizon , IJMPA 35(19), 2050092.