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Observational tests of open strings in braneworld scenarios

dc.contributor.authorFreese, Katherineen_US
dc.contributor.authorLewis, Matthew J.en_US
dc.contributor.authorSchaar, Jan Pieter van deren_US
dc.date.accessioned2006-12-19T19:17:43Z
dc.date.available2006-12-19T19:17:43Z
dc.date.issued2003-07-01en_US
dc.identifier.citationFreese, Katherine; Lewis, Matthew J.; Schaar, Jan Pieter van der (2003). "Observational tests of open strings in braneworld scenarios." Journal of High Energy Physics. 07(026). <http://hdl.handle.net/2027.42/49139>en_US
dc.identifier.issn1126-6708en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/49139
dc.description.abstractWe consider some consequences of describing the gauge and matter degrees of freedom in our universe by open strings, as suggested by the braneworld scenario. We focus on changes in causal structure described by the open string metric and investigate their observational implications. The causal structure is described not by the usual metric gμν, but instead by the open string metric, that incorporates the electromagnetic background and the NS-NS two-form, Gμν = gμν−(2πα′)2(F2)μν. The speed of light on the brane is now slower when propagating along directions transverse to electromagnetic fields or NS-NS two-forms, so that Lorentz invariance is explicitly broken. We describe experiments designed to detect the predicted variations in the open string causal structure on the brane: interferometric laboratory based experiments, experiments exploiting astrophysical electromagnetic fields, and experiments that rely on modification to special relativity. We show that current technology cannot probe beyond open string lengths of 10−13 cm, corresponding to MeV string scales. We also point out that in a braneworld scenario, constraints on large scale electromagnetic fields together with a modest phenomenological bound on the NS-NS two-form naturally lead to a bound on the scale of canonical noncommutativity that is two orders of magnitude below the string length. We show that theoretical constraints on the NS-NS two-form bound the scale of noncommutativity to be well below the Planck length, (|θ|max)(1/2) < 10−35cm × (TeV/stringscale)2.en_US
dc.format.extent3118 bytes
dc.format.extent338725 bytes
dc.format.mimetypetext/plain
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherIOP Publishing Ltden_US
dc.titleObservational tests of open strings in braneworld scenariosen_US
dc.typeArticleen_US
dc.subject.hlbsecondlevelPhysicsen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumMichigan Center for Theoretical Physics, Physics Department, University of Michigan, Ann Arbor, MI 48109, USA, and; ISCAP, Columbia University, 550 W. 120th St., NY, NY, 10027, USA, and; Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106, USAen_US
dc.contributor.affiliationumMichigan Center for Theoretical Physics, Physics Department, University of Michigan, Ann Arbor, MI 48109, USA, anden_US
dc.contributor.affiliationotherCERN Theory Division, CH-1211 Geneva 23, Switzerlanden_US
dc.contributor.affiliationumcampusAnn Arboren_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/49139/2/jhep072003026.pdfen_US
dc.identifier.doihttp://dx.doi.org/10.1088/1126-6708/2003/07/026en_US
dc.identifier.sourceJournal of High Energy Physics.en_US
dc.owningcollnameInterdisciplinary and Peer-Reviewed


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