  Herein, we present a particle-based mechanism and mathematical formulation of
gravity, focusing on the neutrino as the gravity-inducing particle. The
mechanism is based on the primacy of momentum conservation and postulates an
omni-directional distribution throughout the universe of fast small particles
of finite mass that have a low probability of colliding with nucleons. The
measured acceleration between two neighboring mass bodies results from an
alteration of this distribution caused by nucleons of each body interacting
with some of those particles. Based on findings establishing that the neutrino
has mass, we evaluate the various neutrinos as external particle candidates. We
show that for mass quantities up to several times that of the sun the form of
the time rate of momentum transfer to each body is proportional to the product
of the two body masses because of the probability nature of any collision
process, and inversely proportional to the square of the distance between them
because of the mathematical properties of an altered particle flux. A derived
expression involving the neutrino momentum flux, the neutrino-nucleon collision
cross section, and the nucleon mass replaces the constant G from the classical
gravitational model. The neutrino momentum flux that is required to account for
gravity is so large as to cause us herein to re-evaluate conventional notions
in kinematics and the cause of inertial properties and to examine
neutrino-nucleon collisions as a possible source of electromagnetic standing
waves essential to establish electron shell states. This reasoning indicates
that in a much more massive body that is accreting mass, a coulombic collapse
to a black hole will ensue when external neutrinos lose the ability to
penetrate in sufficient numbers to the central region.
