helicity
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Helicity is something related to chromatography, right? How should it be understood?
Helicity is defined as, where p and s represent the momentum and spin of the particle, respectively. Theory and experiments show that the helicity of neutrinos is H=±1. Those with H=+1 are antineutrinos, whose spin direction is the same as their direction of motion; that is, their motion follows a right-handed spiral pattern, and they are known as right-handed antineutrinos ； When H = -1, it is the neutrino v, whose spin direction is opposite to its motion direction; that is, its motion direction corresponds to a left-handed helix, and it is called a left-handed neutrino.