| Autor: |
Helayel-Neto, J. A., de Moraes, L. M., Otoya, V. J. Vasquez |
| Rok vydání: |
2010 |
| Předmět: |
|
| Zdroj: |
Eur.Phys.J.C67:311-319,2010 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1140/epjc/s10052-010-1297-3 |
| Popis: |
In this paper, we reassess the issue of deriving the propagators and identifying the spectrum of excitations associated to the vielbein and spin connection of (1+2)-D gravity in the presence of dynamical torsion, while working in the first-order formulation. A number of peculiarities is pointed out whenever the Chern-Simons term is taken into account along with a combination of bilinear terms in the torsion tensor. We present a procedure to derive the full set of propagators, based on an algebra of enlarged spin-type operators, and we discuss under which conditions the poles of the tree-level 2-point functions correspond to physical excitations that do not conflict with causality and unitarity. |
| Databáze: |
arXiv |
| Externí odkaz: |
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