  In this work we consider the spontaneous symmetry breaking of the electroweak
$SU(2)_L\times U(1)_Y$ gauge group into $U(1)_{em}$ taken place in the Standard
Model of particle physics as seen from the point of view of an accelerating
observer. According to the Unruh effect that observer detects the Minkowski
vacuum as a thermal bath at a temperature proportional to the proper
acceleration $a$. Then we show that (in a certain large $N$ limit) when the
acceleration is bigger than the critical value $a_c = 4 \pi v$ (where $v$ is
the Higgs vacuum expectation value), the electroweak $SU(2)_L\times U(1)_Y$
gauge symmetry is restored and all elementary particles become massless. In
addition, even observers with $a<a_c$, can see this symmetry restoration in the
region close to the Rindler horizon.

General Relativity and Quantum Cosmology;High Energy Physics - Phenomenology;High Energy Physics - Theory