What does helicity mean?
Definitions for helicity
he·lic·i·ty
This dictionary definitions page includes all the possible meanings, example usage and translations of the word helicity.
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Wiktionary
helicitynoun
The quality of being helical.
helicitynoun
The quantized spin component of a moving particle
Wikidata
Helicity
In particle physics, helicity is the projection of the spin onto the direction of momentum, : as the projection of orbital angular momentum along the linear momentum is zero, . Because the eigenvalues of spin with respect to an axis have discrete values, the eigenvalues of helicity are also discrete. For a particle of spin S, the eigenvalues of helicity are S, S − 1, ..., −S. The measured helicity of a spin S particle will range from −S to +S. In 3 + 1 dimensions, the little group for a massless particle is the double cover of SE. This has unitary representations which are invariant under the SE "translations" and transform as ei under a SE rotation by θ. This is the helicity h representation. There is also another unitary representation which transforms non-trivially under the SE translations. This is the continuous spin representation. In d + 1 dimensions, the little group is the double cover of SE. As before, there are unitary representations which don't transform under the SE "translations" and "continuous spin" representations. For massless spin-¹⁄2 particles, helicity is equivalent to the chirality operator multiplied by .
Numerology
Chaldean Numerology
The numerical value of helicity in Chaldean Numerology is: 5
Pythagorean Numerology
The numerical value of helicity in Pythagorean Numerology is: 1
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"helicity." Definitions.net. STANDS4 LLC, 2024. Web. 25 Apr. 2024. <https://www.definitions.net/definition/helicity>.
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