Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-07-20
Phys.Lett.B647:194-199,2007
Physics
High Energy Physics
High Energy Physics - Theory
Added equation (20) clarifying usual assumption behind calculations of soft terms. Version published in PLB
Scientific paper
10.1016/j.physletb.2007.01.049
It is argued that classical string solutions should not be fine tuned to have a positive cosmological constant (CC) at the observed size, since even the quantum corrections from standard model effects will completely negate any classical string theory solution with such a CC. In fact it is even possible that there is no need at all for any ad hoc uplifting term in the potential since these quantum effects may well take care of this. Correspondingly any calculation of the parameters of the MSSM has to be rethought to take into account the evolution of the CC. This considerably complicates the issue since the initial conditions for RG evolution of these parameters are determined by the final condition on the CC! The Anthropic Principle is of no help in addressing these issues.
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