EPJ Web of Conferences
I describe how hadron-hadron scattering amplitudes are related to the eigenstates of QCD in a finite cubic volume. The discrete spectrum of such eigenstates can be determined from correlation functions computed using lattice QCD, and the corresponding scattering amplitudes extracted. I review results from the Hadron Spectrum Collaboration who have used these finite volume methods to study ππ elastic scattering, including the ρ resonance, as well as coupled-channel πK, ηK scattering. The very recent extension to the case where an external current acts is also presented, considering the reaction πγ* → ππ, from which the unstable ρ → πγ transition form factor is extracted. Ongoing calculations are advertised and the outlook for finite volume approaches is presented.
Original Publication Citation
Dudek, J. J. (2016). Hadron resonances from QCD. In EPJ Web of Conferences (Vol. 113, p. 01001). EDP Sciences.
Dudek, Jozef J., "Hadron Resonaces from QCD" (2016). Physics Faculty Publications. 21.