Hi everyone,

I am trying to understand why and how is the normalisation for the positron fraction, here I out two papers that made a different normalization of the positron fraction, but which of them is the correct one?, :

1.-

http://arxiv.org/abs/1307.62042.-

http://arxiv.org/abs/0906.1571v3,

in the case of 1.- \kappa multiply the positron flux and then the sum of both (in the denominator), how the same \kappa can normalizate different things? and when you eliminate the DM signal, \kappa cancel, so no normalisation in that case?? very strange for me.

for 2. the authors multiply \kappa with electron flux, but I don't understand why, positron fraction is normalised? , or I need to normalise both with different coefficient?

Thanks in advance..

Nicolás