Abstract
We show that a new Regge trajectory with and a slope explains the features of hadron-hadron scattering and photoproduction of the and mesons at large energy and momentum transfer. This trajectory with quantum numbers and an odd signature can be considered as a natural partner of the Pomeron which has an even signature. The odd signature of the new exchange leads to contributions to the spin-dependent cross sections, which do not vanish at large energy. The links between the anomalous properties of this trajectory, the axial anomaly, and the flavor singlet axial vector meson are discussed.
- Received 29 November 1999
DOI:https://doi.org/10.1103/PhysRevD.61.094008
©2000 American Physical Society