https://doi.org/10.1140/epjc/s10052-017-5379-3
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
* e-mail: maccafer@to.infn.it
Received:
12
September
2017
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