the projection of the spin of an elementary particle on the direction of propagation
Word origin
C20: from helix + -ity
Examples of 'helicities' in a sentence
helicities
In addition, this spectrometer has the capability to resolve different helicities of light in a single measurement.
Alexander Y. Zhu, Wei-Ting Chen, Mohammadreza Khorasaninejad, Jaewon Oh, Aun Zaidi,Ishan Mishra, Robert C. Devlin, Federico Capasso 2017, 'Ultra-compact visible chiral spectrometer with meta-lenses', APL Photonicshttp://dx.doi.org/10.1063/1.4974259. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
For non-zero mass it describes a spin-1/4 semion supermultiplet of ''relativistic helicities'' (−1/4,1/4).
Luca Mezincescu, Paul K. Townsend 2011, 'The Quantum 3D Superparticle', Symmetry, Integrability and Geometry: Methods and Applicationshttp://dx.doi.org/10.3842/SIGMA.2011.005. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The theory describes the propagation of free massless gauge bosons of integer helicities and their interaction with external currents.
Sebastian Guttenberg, George Savvidy 2008, 'Schwinger-Fronsdal Theory of Abelian Tensor Gauge Fields', Symmetry, Integrability and Geometry: Methods and Applicationshttp://dx.doi.org/10.3842/SIGMA.2008.061. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)