Helicity is an extrinsic physical property related to the alignment of spin and momentum; chirality is related to weak interactions. Chirality is more akin to electric charge or strong color charge …

Polarisation, spin, helicity, chirality and parity keep confusing me. They seem to be related, but exactly how they are related is unclear to me. Can someone maybe give a short overview …

Jan 22, 2018 · Then boost it to the opposite infinitesimal momentum so it has the opposite helicity. The helicity is then a step function of the momentum. What is the value at the midpoint of a …

Aug 15, 2021 · 4 While studying the Dirac equation my professor defined the helicity operator as $$\hat {\lambda}=\dfrac {\vec S \cdot \vec {p}} {|\vec p|}$$ where $\vec S$ is the spin matrix …

Oct 21, 2021 · There are a lot of wrong statements in lecture notes about chirality and helicity, and plenty of wrong answers on this site as well. I've personally written too many answers on …

Apr 19, 2022 · I previously understood helicity to simply be the projection of spin onto momentum - how does this change sign from a mass change, or is this definition of helicity …

Apr 26, 2017 · How does one experimentally determine chirality, helicity, spin and angular momentum of a fundamental particle? Ask Question Asked 14 years, 6 months ago Modified …

Aug 21, 2019 · 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 …

Sep 14, 2017 · 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 …

Jul 2, 2016 · They have helicity, which is the value of the projection of the spin operator onto the momentum operator. The reason for this is the representation theory of the group of spacetime …