Recent content by 302021895

I'm not sure I follow you...

I am studying the generation of tensor perturbations during inflation, and I am trying to check every statement as carefully as possible. Starting from the metric ds^2 = dt^2 - a^2(\delta_{ij}+h_{ij})dx^idx^j I make use of Einstein's equations to find the equation of motion for the...

Oh... I think then that I will cross such analysis from being included in our paper, since my coauthors want it done asap. In any case, it is definitely worth checking the first release, even if it is only as a personal challenge.

Thanks a lot. What you've written makes a lot of sense, although I have no clue on how to use those tools, but the LAMBDA site looks much more friendly that the Planck web page that I was looking at before. I'll give it a try. When you refer to the 'second release software', do you mean that I...

I apologize in advance if this is not the correct place to post this. I am currently writing a paper in no-scale supergravity inflation, and now that the Planck 2015 results are here, it would be nice to use them to constrain the parameters of the model. I am in particular interested in the...

Awesome! Thanks for the help!

I am working on all of the problems from Georgi's book in Lie algebras in particle physics (independent study), but I am stuck on one of them. The question is the following: "Find (2,1)x(2,1) (in su(3) using Young tableaux). Can you determine which representations appear antisymmetrically in...

I just started studying supersymmetry, but I am a little bit confused with the superspace and superfield formalism. When expanding the vector superfield in components, one obtains therms of the form \theta^{\alpha}\chi_{\alpha}, where \theta is a Grassmann number and \chi is a Weyl vector. I...