Further Comments on the Symmetric Subtraction of the Nonlinear Sigma Model

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dc.creatorBettinelli, Daniele
dc.creatorFerrari, Ruggero
dc.creatorQuadri, Andrea
dc.date2007-01-22
dc.date2007-10-08
dc.date.accessioned2026-07-07T11:23:36Z
dc.date.available2026-07-07T11:23:36Z
dc.descriptionRecently a perturbative theory has been constructed, starting from the Feynman rules of the nonlinear sigma model at the tree level in the presence of an external vector source coupled to the flat connection and of a scalar source coupled to the nonlinear sigma model constraint (flat connection formalism). The construction is based on a local functional equation, which overcomes the problems due to the presence (already at one loop) of non chiral symmetric divergences. The subtraction procedure of the divergences in the loop expansion is performed by means of minimal subtraction of properly normalized amplitudes in dimensional regularization. In this paper we complete the study of this subtraction procedure by giving the formal proof that it is symmetric to all orders in the loopwise expansion. We provide further arguments on the issue that, within our subtraction strategy, only two parameters can be consistently used as physical constants.
dc.description26 pages, minor changes, to appear in Int. J. Mod. Phys. A
dc.identifierhttps://arxiv.org/abs/hep-th/0701197
dc.identifierhttp://arxiv.org/abs/hep-th/0701197
dc.identifierInt.J.Mod.Phys.A23:211-232,2008
dc.identifierdoi:10.1142/S0217751X08038226
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194941
dc.subjectHigh Energy Physics - Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.titleFurther Comments on the Symmetric Subtraction of the Nonlinear Sigma Model
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