Closed Bosonic String Field Theory at Quintic Order II: Marginal Deformations and Effective Potential - High Energy Physics - TheoryReport as inadecuate




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Abstract: We verify that the dilaton together with one exactly marginal field, form amoduli space of marginal deformations of closed bosonic string field theory topolynomial order five. We use the results of this successful check in order tofind the best functional form of a fit of quintic amplitudes. We then use thisfit in order to accurately compute the tachyon and dilaton effective potentialin the limit of infinite level. We observe that to order four, the effectivepotential gives unexpectedly accurate results for the vacuum. We are thus ledto conjecture that the effective potential, to a given order, is a goodapproximation to the whole potential including all interactions from thevertices up to this order from the untruncated string field. We then go on andcompute the effective potential to order five. We analyze its vacuum structureand find that it has several saddle points, including the Yang-Zwiebach vacuum,but also a local minimum. We discuss the possible physical meanings of thesevacua.



Author: Nicolas Moeller

Source: https://arxiv.org/







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