Higgs inflation is attractive because it identifies inflaton with the electroweak Higgs boson .
In this work , we construct a new class of supersymmetric Higgs inflationary models in no-scale supergravity with an SU ( 5 ) GUT group .
Extending the no-scale Kähler potential and SU ( 5 ) GUT superpotential , we derive a generic potential for Higgs inflation that includes the quadratic monomial potential and a Starobinsky-type potential as special limits .
This type of models can accommodate a wide range of the tensor-to-scalar ratio r = \mathcal { O } ( { 10 ^ { -3 } -10 ^ { -1 } } ) , as well as a scalar spectral index n _ { s } \sim 0.96 . PACS numbers : 98.80.Cq , 04.65.+e , 12.10.-g , 12.60.Jv Phys .
Rev .
D – Rapid Communication [ arXiv:1411.5537 ] . KCL-PH-TH/2014-48 , LCTS/2014-49 , CERN-PH-TH/2014-230