Chameleon Vector Bosons

Details Chameleon Vector Bosons Chameleon Vector Bosons

2008-02-06

arxiv.org/abs/0802.0762v1

Phys.Rev.D77:095006,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages

Scientific paper

10.1103/PhysRevD.77.095006

We 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 microns, 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.

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