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helicity

   Also found in: Encyclopedia, Wikipedia 0.06 sec.
helicity [hɪˈlɪsɪtɪ]
n pl -ties
(Physics / General Physics) Physics the projection of the spin of an elementary particle on the direction of propagation
[from helix + -ity]
helicity  (h-ls-t, h)
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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? Mentioned in ? References in periodicals archive
 
However the violation of parity equires that the photons be emitted as an incoherent mixture of El and Ml radiations and therefore the radiation is left circularly polarized and the transfer of helicity from electron to photon approaches 100% at the end-point of the spectrum.
Search for radiative [beta]-decay of the free neutron by Severijns, N. / Journal of Research of the National Institute of Standards and Technology
I was hoping that when we saw the crystal structure of the needles, we would see a lock-and-key phenomenon" accounting for the helicity of the aggregate, Fuchs says.
The curling crystal club by Amato, Ivan / Science News
Storm-Relative Helicity (SRH) is defined for a layer of depth h as (Davies-Jones et al.
An examination of three severe convective storms that produced ... by Reuter, Gerhard W. / National Weather Digest
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