Bosonic string theory with constraints linear in the momenta

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dc.creatorMontesinos, Merced
dc.creatorVergara, Jose David
dc.date2001-05-03
dc.date2001-05-05
dc.date.accessioned2026-07-07T04:11:37Z
dc.date.available2026-07-07T04:11:37Z
dc.descriptionThe Hamiltonian analysis of Polyakov action is reviewed putting emphasis in two topics: Dirac observables and gauge conditions. In the case of the closed string it is computed the change of its action induced by the gauge transformation coming from the first class constraints. As expected, the Hamiltonian action is not gauge invariant due to the Hamiltonian constraint quadratic in the momenta. However, it is possible to add a boundary term to the original action to build a fully gauge-invariant action at first order. In addition, two relatives of string theory whose actions are fully gauge-invariant under the gauge symmetry involved when the spatial slice is closed are built. The first one is pure diffeomorphism in the sense it has no Hamiltonian constraint and thus bosonic string theory becomes a sub-sector of its space of solutions. The second one is associated with the tensionless bosonic string, its boundary term induces a canonical transformation and the fully gauge-invariant action written in terms of the new canonical variables becomes linear in the momenta.
dc.descriptionMinor changes, conclusions unaltered. 8 pages, revtex file. To appear in "Membranes 2000," Proceedings of the Fourth Mexican School on Gravitation and Mathematical Physics, Huatulco, 2000
dc.identifierhttps://arxiv.org/abs/hep-th/0105026
dc.identifierhttp://arxiv.org/abs/hep-th/0105026
dc.identifierRev.Mex.Fis. 49S1 (2003) 53-60
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/50661
dc.subjectHigh Energy Physics - Theory
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleBosonic string theory with constraints linear in the momenta
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