|DATE||December 04 (Wed), 2019|
|SPEAKER||Lee, Hyun Min|
|HOST||Leem, Jae Hoon|
|TITLE||Relaxation of four-form fluxes for Higgs mass, cosmological constant and flattening inflaton potential|
We consider the cosmological relaxation of the Higgs mass and the cosmological constant due to the four-form fluxes in four dimensions. We present concrete models of a singlet scalar field with four-form couplings where the Higgs mass is relaxed to a right value as well as the Universe reheats to a sufficiently high reheating temperature after the last membrane nucleation. We also discuss some of interesting features in the cases of singlet scalar fields with non-minimal or minimal couplings to gravity. We also discuss the implications of the non-minimal four-form coupling to gravity for chaotic inflation models with a pseudo-scalar field. The non-minimal four-form coupling to gravity flattens the inflaton potential at large field values, respecting the shift symmetry in the effective Lagrangian. We show the success of inflationary predictions and robustness of the results against higher order terms and address the reheating in these scenarios.