Testing Vector Gravity with Gravitational Wave Interferometers
  Recently, the author proposed an alternative vector theory of gravity. To the
best of our knowledge, vector gravity also passes available tests of gravity,
and, in addition, predicts the correct value of the cosmological constant
without free parameters. It is important to find a new feasible test which can
distinguish between vector gravity and general relativity and determine whether
gravity has a vector or a tensor origin. Here we propose such an experiment
based on measurement of propagation direction of gravitational waves relative
to the perpendicular arms of a laser interferometer. We show that transverse
gravitational wave in vector gravity produces no signal when it propagates in
the direction perpendicular to the interferometer plane or along one of the
arms. In contrast, general relativistic wave yields no signal when it
propagates parallel to the interferometer plane at $45^{\circ }$ angle relative
to an interferometer arm. The test can be performed in the nearest years in a
joint run of the two LIGO and one Virgo interferometers.
