Document Type

Article

Publication Date

2016

DOI

10.1051/epjcof/201611301001

Publication Title

EPJ Web of Conferences

Volume

113

Pages

1-8

Abstract

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.

ORCID

0000-0003-4327-2121 (Dudek)

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