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2. Chirality (physics) - Wikipedia

   en.wikipedia.org/wiki/Chirality_(physics)

   Since the helicity of massive particles is frame-dependent, it might seem that the same particle would interact with the weak force according to one frame of reference, but not another. The resolution to this paradox is that the chirality operator is equivalent to helicity for massless fields only, for which helicity is not frame-dependent. By ...

3. Chirality - Wikipedia

   en.wikipedia.org/wiki/Chirality

   In particular for a massless particle the helicity is the same as the chirality while for an antiparticle they have opposite sign. The handedness in both chirality and helicity relate to the rotation of a particle while it proceeds in linear motion with reference to the human hands. The thumb of the hand points towards the direction of linear ...

4. Hydrodynamical helicity - Wikipedia

   en.wikipedia.org/wiki/Hydrodynamical_helicity

   Helicity is a pseudo-scalar quantity: it changes sign under change from a right-handed to a left-handed frame of reference; it can be considered as a measure of the handedness (or chirality) of the flow. Helicity is one of the four known integral invariants of the Euler equations; the other three are energy, momentum and angular momentum.

5. Axial chirality - Wikipedia

   en.wikipedia.org/wiki/Axial_chirality

   The chirality of a molecule that has a helical, propeller, or screw-shaped geometry is called helicity [5] or helical chirality. [6] [7] The screw axis or the D n, or C n principle symmetry axis is considered to be the axis of chirality. Some sources consider helical chirality to be a type of axial chirality, [7] and some do not.

6. Helicity (particle physics) - Wikipedia

   en.wikipedia.org/wiki/Helicity_(particle_physics)

   By contrast, for massive particles, distinct chirality states (e.g., as occur in the weak interaction charges) have both positive and negative helicity components, in ratios proportional to the mass of the particle. A treatment of the helicity of gravitational waves can be found in Weinberg. [5]

7. Sterile neutrino - Wikipedia

   en.wikipedia.org/wiki/Sterile_neutrino

   Yet all neutrinos have been observed with left-handed chirality, and all antineutrinos right-handed. (See Chirality (physics) § Chirality and helicity for the difference.) Chirality is a fundamental property of particles and is relativistically invariant: It is the same regardless of the particle's speed and mass in every inertial reference ...