The p-wave contacts
In a degenerate Fermi gas near a p-wave Feshbach resonance, we observe the two ``p-wave contacts,'' a generalization of the contact function well known for s-wave interactions. The p-wave contacts, Cv and CR, are thermodynamic conjugates of the scattering volume v and effective range R, but are also expected to describe the asymptotic momentum distribution, two-body correlation function, and correction to the ideal-gas virial in a trap. Using rf spectroscopy, we measure the field dependence of the both contacts near the a dipole-split p-wave resonance in 40K, and study the dynamical response of Cv to a sudden increase in v.