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The Standard Model says that only left-handed electrons participate in weak interaction. A very natural question for novices like me is then: How can we tell, experimentally, if an electron is left-handed or right-handed? I understand that chirality is an intrinsic quantum number of the particle field that is different from the helicity for massive particles.

ashpool
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    Not exactly the same, but related: http://physics.stackexchange.com/questions/13688/left-and-right-handed-fermions – userLTK Nov 15 '15 at 03:47
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    Duplicate: http://physics.stackexchange.com/questions/161170/how-can-we-measure-chirality-in-experiments/161522#161522 – JeffDror Nov 17 '15 at 22:27

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