Tachyon Potential in a Magnetic Field with Anomalous Dimensi

Products defined in the context of noncommutative gauge theory allow for an interpolation between exact results on tachyon potentials at zero and large background B-fields. Techniques for computations of effective actions are transposed from the framework

CPHT-RR048.0804

TachyonPotentialinaMagneticField

withAnomalousDimensions

arXiv:hep-th/0410180v1 17 Oct 2004PascalGrange´Centredephysiqueth´eoriquedel’Ecolepolytechnique,routedeSaclay,91128PalaiseauCedex,Francepascal.grange@cpht.polytechnique.frABSTRACT

Productsde nedinthecontextofnoncommutativegaugetheoryallowforaninterpolationbetweenexactresultsontachyonpotentialsatzeroandlargebackgroundB- elds.Techniquesforcomputationsofe ectiveactionsaretransposedfromtheframeworkofgaugetheorytotheframeworkofboundarystring eldtheory,resultingindeformationsofthenoncommutativetachyonpotentialbyanomalousdimensions.

October2004

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