Microscopic cluster model study of 3He+p scattering

We calculate the 3He+p scattering phase shifts for the S and P waves in a microscopic cluster model, in which the description of the 3He wave function is extended from a simple (0s)3 model to a three-body model. We employ two different nucleon-nucleon interactions, the Minnesota (MN) and AV8' potentials, to investigate the role of the d+2p channel in the low-energy phase shifts. The role of the d+2p channel in the P-wave phase shifts is very sensitive to the choice of the potential. The d+2p channel is indispensable in reproducing the resonant phase shifts in the AV8' potential while it plays a minor role in the MN potential. On the contrary, the role of this channel in the S-wave nonresonant phase shifts is negligible in both potentials.