Higher-dimensional geometric sigma models
Apstrakt
Geometric sigma models have been defined as geometric theories of metric excitations of a given background geometry, and then covariantized by identifying the coordinates of space-time with a set of scalar fields. By construction, these theories have the property of accommodating both the scalar matter of pure geometric origin and a ground state specified in advance. Using this fact, one can build a Kaluza-Klein geometric sigma model by specifying the background metric of the form M-4 x B-d, thus obtaining a theory free of the classical cosmological constant problem. Previously exploited ideas to use scalar fields in the form of a nonlinear sigma model coupled to gravity to trigger the compactification failed to give massless gauge fields after dimensional reduction. In this paper, sigma modified geometric a model is suggested, which reconciles the masslessness of the gauge fields with the zero value of the cosmological constant. [S0556-2821(99)03310-6].
Izvor:
Physical Review D, 1999, 60, 2
DOI: 10.1103/PhysRevD.60.025003
ISSN: 2470-0010; 2470-0029
WoS: 000081467700044
Scopus: 2-s2.0-16444383970
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Vasilić, Milovan PY - 1999 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2261 AB - Geometric sigma models have been defined as geometric theories of metric excitations of a given background geometry, and then covariantized by identifying the coordinates of space-time with a set of scalar fields. By construction, these theories have the property of accommodating both the scalar matter of pure geometric origin and a ground state specified in advance. Using this fact, one can build a Kaluza-Klein geometric sigma model by specifying the background metric of the form M-4 x B-d, thus obtaining a theory free of the classical cosmological constant problem. Previously exploited ideas to use scalar fields in the form of a nonlinear sigma model coupled to gravity to trigger the compactification failed to give massless gauge fields after dimensional reduction. In this paper, sigma modified geometric a model is suggested, which reconciles the masslessness of the gauge fields with the zero value of the cosmological constant. [S0556-2821(99)03310-6]. T2 - Physical Review D T1 - Higher-dimensional geometric sigma models VL - 60 IS - 2 DO - 10.1103/PhysRevD.60.025003 ER -
@article{ author = "Vasilić, Milovan", year = "1999", abstract = "Geometric sigma models have been defined as geometric theories of metric excitations of a given background geometry, and then covariantized by identifying the coordinates of space-time with a set of scalar fields. By construction, these theories have the property of accommodating both the scalar matter of pure geometric origin and a ground state specified in advance. Using this fact, one can build a Kaluza-Klein geometric sigma model by specifying the background metric of the form M-4 x B-d, thus obtaining a theory free of the classical cosmological constant problem. Previously exploited ideas to use scalar fields in the form of a nonlinear sigma model coupled to gravity to trigger the compactification failed to give massless gauge fields after dimensional reduction. In this paper, sigma modified geometric a model is suggested, which reconciles the masslessness of the gauge fields with the zero value of the cosmological constant. [S0556-2821(99)03310-6].", journal = "Physical Review D", title = "Higher-dimensional geometric sigma models", volume = "60", number = "2", doi = "10.1103/PhysRevD.60.025003" }
Vasilić, M.. (1999). Higher-dimensional geometric sigma models. in Physical Review D, 60(2). https://doi.org/10.1103/PhysRevD.60.025003
Vasilić M. Higher-dimensional geometric sigma models. in Physical Review D. 1999;60(2). doi:10.1103/PhysRevD.60.025003 .
Vasilić, Milovan, "Higher-dimensional geometric sigma models" in Physical Review D, 60, no. 2 (1999), https://doi.org/10.1103/PhysRevD.60.025003 . .