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Chameleon Vector Bosons

AuthorsNelson, Ann E.; Walsh, Jonathan
KeywordsExtensions of electroweak gauge sector
High Energy Physics - Phenomenology
General Relativity and Quantum Cosmology
Issue Date6-Feb-2008
PublisherAmerican Physical Society
CitationarXiv:0802.0762v1 [hep-ph]
Phys. Rev. D 77, 095006 (2008)
AbstractWe show that for a force mediated by a vector particle coupled to a conserved U(1) charge, the apparent range and strength can depend on the size and density of the source, and the proximity to other sources. This "chameleon" effect is due to screening from a light charged scalar. Such screening can weaken astrophysical constraints on new gauge bosons. As an example we consider the constraints on chameleonic gauged B-L. We show that although Casimir measurements greatly constrain any B-L force much stronger than gravity with range longer than 0.1 μm, there remains an experimental window for a long range chameleonic B-L force. Such a force could be much stronger than gravity, and long or infinite range in vacuum, but have an effective range near the surface of the earth which is less than a micron.
Description10 pages.-- PACS number: 12.60.Cn.-- Published in: Phys. Rev. D 77, 095006 (2008) (10 pages).-- Final full-text version of the paper available at: http://dx.doi.org/10.1103/PhysRevD.77.095006.
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