A-term inflation and the MSSM

Details A-term inflation and the MSSM A-term inflation and the MSSM

2006-08-28

arxiv.org/abs/hep-ph/0608299v3

JCAP 0701:015,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 3 figures; Comments added, typos corrected

Scientific paper

10.1088/1475-7516/2007/01/015

The parameter space for A-term inflation is explored with $W=\lambda_p \phi^p/(p M_P^{p-3})$. With p=6 and \lambda_p~1, the observed spectrum and spectral tilt can be obtained with soft mass of order 10^2 GeV but not with a much higher mass. The case p=3 requires \lambda_p~10^{-9} to 10^{-12}. The ratio m/A requires fine-tuning, which may be justified on environmental grounds. An extension of the MSSM to include non-renormalizable terms and/or Dirac neutrino masses might support either A-term inflation or modular inflation.

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