Question
A virtual particle having an approximate mass of $10\times 10^{14}\textrm{ GeV/c}^2$ may be associated with the unification of the strong and electroweak forces. For what length of time could this virtual particle exist (in temporary violation of the conservation of mass-energy as allowed by the Heisenberg uncertainty principle)?
$3\times 10^{-39}\textrm{ s}$