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We investigate the comparative studies of cosmological baryon asymmetry indifferent neutrino mass models with and without {\theta}_13 by considering thethree diagonal form of Dirac neutrino mass matrices, down-quark (4,2), up-quark(8,4) and charged lepton (6,2). The predictions of any models with {\theta}_13are consistent in all the three stages of leptogenesis calculations and theresults are better than the predictions of any models without {\theta}_13 whichare consistent in a piecemeal manner with the observational data. For the bestmodel, the normal hierarchy Type-IA for charged lepton (6,2) without{\theta}_13, the predicted inflaton mass required to produce the observedbaryon asymmetry is found to be 3.6x10 to the power 10 GeV corresponding toreheating temperature TR 4.5x10 to the power 6 GeV, while for the same modelwith {\theta}_13, the inflaton mass is 2.24x10 to the power 11 GeV, TR 4.865x10to the power 6 GeV and weak scale gravitino mass m(2 divided by 3) 100 GeVwithout causing the gravitino problem. These values apply to the recentdiscovery of Higgs boson of mass 125 GeV. The relic abundance of gravitino isproportional to the reheating temperature of the thermal bath. One can have theright order of relic dark matter abundance only if the reheating temperature isbounded to below 10 to the power 7 GeV.

Baryon Asymmetry in Neutrino Mass Models with and without {\theta}_13