Talk:Rho meson

Chiral limit

No! In the chiral limit, we have two global symmetries $SU(N_{f})_{L}$ and $SU(N_{f})_{R}$ . We also have a hidden gauge symmetry $SU(N_{f})_{hid}$ which is completely distinct from the chiral symmetries. The global chiral symmetry group is spontaneously broken to $SU(N_{f})_{diag}$ with the pions as the Goldstone bosons whereas the hidden gauge symmetry is also spontaneously broken, leading to the massive rho mesons. Phys 20:44, 30 October 2005 (UTC)[reply]

I don't understand the complaint. The chiral left and right sum to vector and axial vector. Quantization breaks the axial vector due to the chiral anomaly. The vector is the "diagonal" part, and both rho and pi belong to it. Rho is spin-one, pi is spin-zero. The "obvious" analogy is that pions are like L=0 ground-state hydrogen, and rho is like the L=1 excited state of hydrogen. I don't see why a hidden flavor symmetry is needed. I guess you're saying "Georgi is wrong", but its been 30-40-50 years, and whatever controversy has died down. Meanwhile the chiral anomaly and the soliton models continue to attract attention, so you could say "they won". I suppose a "history of conflicting explanations" is appropriate, but I can't write it. 67.198.37.16 (talk) 18:55, 22 May 2024 (UTC)[reply]

Hadron overhaul

Please give input at Talk:Hadron#Hadron overhaul. Thanks. Headbomb {^ταλκ_{κοντριβς} – WP Physics} 01:59, 24 January 2010 (UTC)[reply]