Helicity



/hɪˈlɪsɪtɪ/
noun (pl) -ties
1.
(physics) the projection of the spin of an elementary particle on the direction of propagation
helicity
(hə-lĭs’ĭ-tē, hē’)
The projection of a particle’s spin vector in the direction of its momentum vector, being positive if it points in the same direction, and negative if it points in the opposite direction. Helicity is in effect the handedness, or chirality, of the spin of a particle.

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  • Helico-

    1. a combining form meaning “spiral”; used with this meaning and as a combining form of in the formation of compound words: helicograph. combining form 1. spiral or helical: helicograph



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    [hel-i-koh-graf, -grahf] /ˈhɛl ɪ koʊˌgræf, -ˌgrɑf/ noun 1. an instrument for drawing helices. /ˈhɛlɪkəʊˌɡrɑːf; -ˌɡræf/ noun 1. an instrument for drawing spiral curves

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