Regular Article - Theoretical Physics
BCFT and OSFT moduli: an exact perturbative comparison
Dipartimento di Fisica, Universitá di Torino and INFN, Sezione di Torino, Via Pietro Giuria 1, 10125, Torino, Italy
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Accepted: 8 November 2017
Published online: 26 November 2017
Starting from the pseudo- gauge solution for marginal deformations in OSFT, we analytically compute the relation between the perturbative deformation parameter in the solution and the BCFT marginal parameter , up to fifth order, by evaluating the Ellwood invariants. We observe that the microscopic reason why and are different is that the OSFT propagator renormalizes contact-term divergences differently from the contour deformation used in BCFT.
© The Author(s), 2017