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Closed Bosonic String Field Theory at Quintic Order: Five-Tachyon Contact Term and Dilaton Theorem

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dc.contributor.author Moeller, Nicolas en_US
dc.date.accessioned 2006-10-11T07:32:11Z en_US
dc.date.accessioned 2011-09-07T20:27:13Z
dc.date.available 2006-10-11T07:32:11Z en_US
dc.date.available 2011-09-07T20:27:13Z
dc.date.issued 2006-10-11T07:32:11Z en_US
dc.identifier.citation JHEP 03 (2007) 043 en_US
dc.identifier.uri http://preprints.sissa.it/xmlui/handle/1963/1871 en_US
dc.description.abstract We solve the geometry of the closed string field theory five-point vertex. Our solution is calculated in terms of quadratic Strebel differentials which are found numerically all over the relevant subspace of the moduli space of spheres with five punctures. Part of the boundary of the reduced moduli space is described in terms of an algebraic curve, while the remaining part has to be evaluated numerically. We use this data to compute the contact term of five tachyons and estimate its uncertainty to be of about 0.1%. To put to a test the theory and the computations done, we calculate the contact term of five dilatons. In agreement with the dilaton theorem, it is found to cancel the term obtained from the tree level Feynman diagrams built with three- and four-vertices. This cancellation, achieved with a precision of about 0.1%, is within the estimated margin error on the contact term and is therefore a very good evidence that our computations are reliable. The techniques and numerical algorithm developed in this paper make it possible to compute the contact amplitude of any five off-shell closed bosonic string states. en_US
dc.format.extent 565670 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.relation.ispartofseries SISSA;57/2006/EP en_US
dc.relation.ispartofseries arXiv.org;hep-th/0609209 en_US
dc.relation.uri 10.1088/1126-6708/2007/03/043 en_US
dc.title Closed Bosonic String Field Theory at Quintic Order: Five-Tachyon Contact Term and Dilaton Theorem en_US
dc.type Preprint en_US
dc.contributor.department Elementary Particle Theory en_US
dc.contributor.area Physics en_US


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