Constraining CSL model from standard cosmology and spectral distortions of CMBR

Continuous Spontaneous Localization (CSL) model modifies the linear Schr\"{o}dinger equation of standard Quantum Mechanics by adding stochastic non-linear terms to it. The aim of such a model is to describe the quantum (probabilistic) nature of microsystems along with the classical nature (violation of superposition principle) of macroscopic ones. The addition of such non-linear terms in the Schr\"{o}dinger equation leads to non-conservation of energy of the system under consideration. Thus, a striking feature of such a spontaneous collapse model is to heat non-relativistic particles with a constant rate. If such a process is physical, then it has the ability to perturb the well-understood thermal history of the universe. In this talk we will analyze the impacts of such heating terms coming from CSL models on standard evolution of non-relativistic matter and on the formation of CMBR. We will also put constraints on the CSL strength parameter $\lambda$ by considering that the standard evolution of non-relativistic matter is not hampered and the observed precise blackbody spectrum of CMBR would not get distorted (in the form of $\mu-$type and $y-$type distortions) so as to violate the observed bounds.