Publication : t08/019
Higher-loop amplitudes in the non-minimal pure spinor formalism
Grassi P.A. (DISTA, Universita del Piemonte Orientale, via Bellini 25/g, 15100 Alessandria, ITALY)Vanhove P. (CEA, DSM, SPhT (Service de Physique Théorique), F-91191 Gif-sur-Yvette, FRANCE)
Abstract:Année de publication : 2009
We analyze the properties of the non-minimal pure spinor formalism. We show that Siegel gauge on massless vertex operators implies the primary field constraint and the level-matching condition in closed string theory by reconstructing the integrated vertex operator representation from the unintegrated ones. The pure spinor integration in the non-minimal formalism needs a regularisation. To this end we introduce a new regulator for the pure spinor integration and an extension of the regulator to allow for the saturation of the fermionic d-zero modes to all orders in perturbation. We conclude with a preliminary analysis of the properties of the four-graviton amplitude to all genus order.
Revue : JHEP 0905 089 (2009)
DOI : 10.1088/1126-6708/2009/05/089
Preprint : arXiv:0903.3903
Lien : http://iopscience.iop.org/1126-6708/2009/05/089/?ejredirect=.iopscience
Langue : Anglais
Fichier(s) à télécharger :
publi.pdf 1126-6708_2009_05_089.pdf
