Gravity is ALWAYS involved, even for massless particles. Massless particles are known to experience the same gravitational acceleration as other particles (which provides empirical evidence for the equivalence principle <http://en.wikipedia.org/wiki/Equivalence_principle>) because they do have relativistic mass<http://en.wikipedia.org/wiki/Relativistic_mass>, which is what acts as the gravity charge.
On Friday, August 31, 2012, Terry Blanton wrote: > On Fri, Aug 31, 2012 at 9:40 PM, Harry Veeder > <[email protected]<javascript:;>> > wrote: > > > Is the kinetic energy in that world also "negative" so that when a > > particle with negative kinetic energy collides with a particle of > > equal but positive kinetic energy the result is zero energy? > > I think there is a Planck time issue here (5.3x10^-44s). The answer > is yes, assuming the recombination occurs within the half cycle of > Planck time. Otherwise, maybe there is an energy gain due to the > physical separation. What could cause the separation of these virtual > particles in this period? > > Could gravity be involved? Stewart? > > T > >
