Inflation with a running spectral index in supergravity

The first year Wilkinson Microwave Anisotropy Probe data favor primordial adiabatic fluctuation with a running spectral index with nₒ>1 on a large scale and nₒ1 (hybrid inflation) or nₒ<1 (new, chaotic, or topological inflation). We give a sensible particle physics model in supergravity that accommodates the desired running of the spectral index using double inflation.