🚀 go-pugleaf

jac@ds8.scri.fsu.edu (Jim Carr) writes:

> In principle, one could measure the change in gravity when a particle 
> and anti-particle annihilate, but in practice ....

Such statements, though oK, should be taken with some care ..

Since the equation of continuity for the energy-momentum tensor also holds
for the annihilation process (it is a Noether identity, guaranteed if the
underlying theory is based on a Lagrangian), there is a continuous well-
defined behaviour of the gravitational force of the system. Of course you
then could still observe (in principle) the process of annihilation by 
watching gravity, and viewing that some particles move the way they do ..
--
 Hartmut Frommert                 <phfrom@nyx.uni-konstanz.de>
 Dept of Physics, Univ of Constance, P.O.Box 55 60, D-W-7750 Konstanz, Germany
                                           -- Eat whale killers, not whales --