### parametrization of Hubble parameter

Posted:

**February 25 2020**i want to add a new parameterization of H(z)**2 = Hfid**2 (A (1+z)**3+ B + Cz + D (1+z)**e)**0.5

to study the evolution of Hubble without too many assuming low redshift physics and recreating the triangle plot of the paramater A, B, C, D, e. this is an expansion of lambdacdm model which is the default in cosmomc. if i want to add that and only using sn and bao data, which file i can modify? indeed, i know where to locate the likelihood for data and new equation but since this is not just adding new likelihood but also modifying the model and i cant find any source on that topic, i am left confused. m sorry for such a lot of question. i am recreating the work previously done by Lemos et al. on model independent H(z) reconstruction.

to study the evolution of Hubble without too many assuming low redshift physics and recreating the triangle plot of the paramater A, B, C, D, e. this is an expansion of lambdacdm model which is the default in cosmomc. if i want to add that and only using sn and bao data, which file i can modify? indeed, i know where to locate the likelihood for data and new equation but since this is not just adding new likelihood but also modifying the model and i cant find any source on that topic, i am left confused. m sorry for such a lot of question. i am recreating the work previously done by Lemos et al. on model independent H(z) reconstruction.