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 θ(μν) parameter, which has a dimension of inverse mass squared. We assume that the zeroth order term in θ-expansion represents the Standard Model and study the effects induced by linear terms in θ(μν). Low-energy precision experiments place the limit on the possible size of this background at the level of 1/√θ ≥ 5 x 1014 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 θ(μν) = 0 and avoid cosmological moduli problem. (C) 2000 Elsevier Science B.V.
|Original language||English (US)|
|Number of pages||7|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Sep 21 2000|
Bibliographical noteFunding Information:
M.P. thanks A. Lossev for very helpful discussions and interest taken in this work. I.M. and R.R. thank I. Chepelev for discussions. This work was supported in part by the Department of Energy under Grant No. DE-FG02-94ER40823 and NSF grant PHY-9722101.