Chirality and helicity are subjects dear to my heart. I have mentioned them in some of my posts. I will be writing more on chirality and helicity but it will be hard to beat Tanedo’s version in terms of clarity and entertainment value.
“Helicity, Chirality, Mass, and the Higgs” by Flip Tanedo
http://www.quantumdiaries.org/2011/06/19/helicity-chirality-mass-and-the-higgs/
Suresh Emre
Renaissance Universal 