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### Left-handed and right-handed helicity, can you explained well the phenomenon of chirality simply? [duplicate]

Chirality, helicity as a projection of its spin vector .. that becomes a kind of 'virtual spin'? I often confuse them: but the particles 'spin' on the right or left, or is the projection of .. what? ...
13k views

### What's the difference between helicity and chirality?

When a particle spins in the same direction as its momentum, it has right helicity, and left helicity otherwise. Neutrinos, however, have some kind of inherent helicity called chirality. But they can ...
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### The electron and neutrino spin

Can you please clarify some basic notions about spin? Can you please explain what is intended when they say that the spin of a neutrino is left-handed and equal to -1/2? Does it mean its angular ...
666 views

### Transverse polarizations of a massless spin 1 particle

Physical polarization vectors are transverse, $p\cdot{\epsilon}=0$, where $p$ is the momentum of a photon and $\epsilon$ is a polarization vector. Physical polarization vectors are unchanged under a ...
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### What are the differences between chiral states and helical states in condensed matter physics?

As we know in particle physics, chirality corresponds to eigenvalues of the fifth gamma matrix, and helicity corresponds to the value of the projection of spin onto momentum. So in condensed matter ...
341 views

### Why is helicity important in quantum field theory?

What makes helicity an important quantity in quantum field theory? I know that one can classify particles by mass and spin. For particles without mass one uses helicity (correct me if this is wrong). ...
130 views

### Difference between left- and right-handed, helicity and chirality

What is the difference? I know there is the (almost) same question What's the difference between helicity and chirality? but when a particle is given as left-handed. Is it helicity or chirality?