Chirality (physical)

In physics

A vector field with symmetry mirror: Example: the electric field produced by a “electron mirror” is the image in the mirror of the field produced by the electron. On the other hand the magnetic field produced by the movement of the “electron mirror” is reversed: the Bm magnetic field behind the mirror is obtained by taking antisymmetric field B in front of the mirror. That comes from the definition of the magnetic field by a vector product; the vector product is not a vector, but an antisymmetric tensor which comprises only three nonnull components in a space with three dimensions and which can thus be represented by three components: a pseudovector.

In physics of the particles

The fundamental laws of physics must be chiral, except the weak interaction which is not invariant in symmetry safe mirror to replace the particles by their antiparticles; the disintegration of the Kaon seems not to check this symmetry.

The chirality is important in physics of the particles owing to the fact that the universe is asymmetrical for the Spin S.

However until now, the Neutrino S detected have a helicity Left (value of spin projected on the direction of the movement = -1/2 < 0) and the Antineutrino S a helicity Right (value of spin projected on the direction of the movement = +1/2 > 0); one can include/understand this rupture of the parity (invariance for the inversion of the space frame of reference) by the fact that the Neutrino has an almost null mass (thus a kinematic behavior near to that of the light in the laboratories) and interacts only by the weak force.

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