  According to the commonly accepted interpretation of Quantum Mechanics, it is
only possible to talk about the existence of elementary particles when they are
detected by an experiment or by a classical measurement device. This has led to
distortions with regard to the objective existence of reality, since it would
be necessary an observer to materialize the elementary particle. This issue is
solved when the elementary particle is placed in permanent interaction with the
rest of the universe, so its existence would not depend on any intelligent
observer and thus the objective range of elementary particles would be
recovered. This article explores the interaction between elementary particles
and a background action field of stochastic character and it is also determined
that the standard deviation of the particle-background field interaction is
essentially the Planck constant, since the expressions of the energy according
to the Planck postulate and the momentum according to the Louis de Broglie
thesis follow in a natural way. In addition, the expression for the wave
function of a free particle is obtained from the solution of the integral
equation that relates the momentum and the energy with the wave vector and the
angular frequency of a Gaussian distribution. Also, the Schr\"odinger equation
is deduced from the expression for the wave function of an elementary particle
in a potential field. Finally, the uncertainty principle is obtained. The
theory presented in this article rescues the objective nature of Quantum
Mechanics which implies that elementary particles exist independently of
observers since the classical measurement device in this theory, introduced by
the authors, is the own universe.
