Low-energy limits on the antisymmetric tensor field background on the brane and on the noncommutative scale

DOI10.1016/S0370-2693(00)00928-XzbMATH Open1055.81610arXivhep-ph/0005191OpenAlexW3104637168MaRDI QIDQ1580574

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Publication date: 19 September 2000

Published in: (Search for Journal in Brave)

Abstract: 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 $het{a}_{muu}$ 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 u}. Low-energy precision experiments place the limit on the possible size of this background at the level of $1/sqrtheta>5imes10^{14}$ 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 $het{a}_{muu}=0$ and avoid cosmological moduli problem.

Full work available at URL: https://arxiv.org/abs/hep-ph/0005191

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