Abstract
We briefly review the status of various conventional quark-antiquark mesons below 2 GeV and outline some open questions: the status of the strangeantistrange orbitally excited vector meson, the status of the nonet of axial-tensor mesons (chiral partners of the well known tensor mesons), and the isoscalar mixing angle in the pseudotensor sector, which can eventually represent a novel manifestation of the chiral anomaly.
Reference49 articles.
1. From controversy to precision on the sigma meson: A review on the status of the non-ordinary f0(500) resonance
2. Maiani L., Pilloni A. (2022), 2207.05141
3. Mai M., Meißner U.G., Urbach C. (2022), 2206.01477
4. Mezzadri G., PoS EPS-HEP2015, 423 (2015)