Tensor meson exchange at low energies

Understand

We complete the analysis of meson resonance contributions to chiral low-energy constants of O(p^4) by including all quark-antiquark bound states with orbital angular momentum less or equal to one.

• Different tensor meson Lagrangians used in previous work are shown to produce the same final results for the low-energy constants once QCD short-distance constraints are properly implemented.
• We also discuss the possible relevance of axial-vector mesons with odd C-parity.