Analytic perturbative black hole solutions in dark photon models with minimal and higher-order magnetic dipole corrections to the Schwarzschild geometry.
Spin-Dependent Macroscopic Forces from New Particle Exchange
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abstract
Long-range forces between macroscopic objects are mediated by light particles that interact with the electrons or nucleons, and include spin-dependent static components as well as spin- and velocity-dependent components. We parametrize the long-range potential between two fermions assuming rotational invariance, and find 16 different components. Applying this result to electrically neutral objects, we show that the macroscopic potential depends on 72 measurable parameters. We then derive the potential induced by the exchange of a new gauge boson or spinless particle, and compare the limits set by measurements of macroscopic forces to the astrophysical limits on the couplings of these particles.
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Theoretical proposal for a spacecraft-Earth experiment to constrain spin- and velocity-dependent fifth forces mediated by ultralight vector bosons, claiming up to three orders of magnitude improvement over current bounds.
The paper surveys theoretical motivations, experimental searches, and bounds on the dark photon as a kinetically mixed gauge boson from a dark sector, covering both massive and massless cases along with related milli-charged fermion constraints.
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Black Hole Solutions in Dark Photon Models with Higher Order Corrections
Analytic perturbative black hole solutions in dark photon models with minimal and higher-order magnetic dipole corrections to the Schwarzschild geometry.