Login

Invisibles

Flat View
See by year
Monthly View
See by month
Weekly View
See by week
Daily View
See Today
Search
Search
   
New Light Species and the CMB by Matthew Walters (John Hopkins U)
Tuesday 23 April 2013, 15:00 - 16:00

Reference:

Invisibles Journal Club: New Light Species and the CMB

Matthew Walters
John Hopkins University
IFIC's Seminar Room

Webinar from Barcelona: I will discuss recent work done in collaboration with Christopher Brust and David E. Kaplan. Specifically, I will consider the effects of new light species on the Cosmic Microwave Background within the framework of effective field theory. These effects are parameterized in terms of the relativistic degrees of freedom present at recombination. After reviewing the relevant details of early universe thermodynamics, I will provide a map between the parameters of any particular theory and the predicted effective number of degrees of freedom. I will then use this map to interpret the recent results from the Planck satellite, presenting new constraints on the parameter space of several models containing new light species.

 

Back

Copyright © Monday the 11th 2017. Sabor y Origen de la Materia. - All rights reserved.