High Energy Physics Seminars

Relativistic weak quantum gravity, and it's significance for the standard model of particle physics.

by Prof. T. P. Singh (DAA, TIFR)

Monday, November 22, 2021 from to (Asia/Kolkata)
at TIFR, Mumbai
Description
A quantum system such as an electron does not produce a classical gravitational field. The produced gravity itself obeys the quantum superposition principle, and hence cannot be described as a weak gravitational perturbation of flat Minowski spacetime. Instead, it is described by a non-commutative spacetime, even at the low energies at which the standard model has currently been tested. This noncommutative spacetime acts back on the elementary particles which produce it, and determines their various properties such as quantization of electric charge, and the value 1/137 of the low energy fine structure constant. We unambiguously predict the existence of three light right-handed sterile neutrinos, and that the neutrino is a Majorana particle. In this talk we explain in a simple way how these results come about, and prospects for theoretically determining other parameters such as neutrino masses and the CKM quark mixing matrix.