Abhijit Kumar Saha

5 Questions 7 Answers 0 Followers

Questions related from Abhijit Kumar Saha

Why is the connection between cosmology and particle phyics important?

Usually we always look for particle physics description of cosmology to explain several cosmological puzzles like dark matter, inflation. My question is exactly why we look for such a bridge...

05 May 2018 5,081 11 View

What does 'UV Completion' mean and what is meant by a theory is IR free?

Is there any relation of both with QCD?

11 November 2014 4,713 6 View

Why are scalar perturbations in FRW metric not called "gravity" waves?

It is said that tensor perturbations in FRW metric satisfies some wave equations. And the solutions of those wave equations are called gravity waves. My confusion is why the word "gravity" comes...

05 May 2014 476 11 View

What is meant by scale invariance in big bang cosmology?

In a big bang cosmology there is a parameter called spectral index that measures deviation of scalar curvature perturbation from scale invariance. I want to know what is this invariance?

04 April 2014 7,390 4 View

At present which inflation model is most acceptable among the hybrid, chaotic, and etc. models?

And why?

02 February 2014 5,063 0 View