Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-05-18
Phys.Lett. B489 (2000) 390-396
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, latex
Scientific paper
10.1016/S0370-2693(00)00928-X
A non-vanishing vacuum expectation value for an antisymmetric tensor field leads to the violation of Lorentz invariance on the brane. This violation is controlled by the $\theta_{\mu \nu}$ parameter, which has a dimension of inverse mass squared. We assume that the zeroth order term in theta-expansion represents the Standard Model and study the effects induced by linear terms in theta_{\mu\nu}. Low-energy precision experiments place the limit on the possible size of this background at the level of $1/\sqrt{\theta} > 5 \times 10^{14}$ GeV. This poses certain difficulty for the TeV-range string scale models, in which the antisymmetric field has to acquire a relatively large mass to ensure that $\theta_{\mu \nu}=0$ and avoid cosmological moduli problem.
Mocioiu Irina
Pospelov Maxim
Roiban Radu
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