| Issue |
EPJ Web Conf.
Volume 113, 2016
21st International Conference on Few-Body Problems in Physics
|
|
|---|---|---|
| Article Number | 01001 | |
| Number of page(s) | 8 | |
| Section | Plenary Talks | |
| DOI | https://doi.org/10.1051/epjconf/201611301001 | |
| Published online | 25 March 2016 | |
https://doi.org/10.1051/epjconf/201611301001
Hadron Resonances from QCD
1 Department of Physics, Old Dominion University, Norfolk, VA 23529 , USA
2 Theory Center, Jefferson Lab, 12000 Jefferson Avenue, Newport News, VA 23606, USA
a e-mail: dudek@jlab.org
Published online: 25 March 2016
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.
© Owned by the authors, published by EDP Sciences, 2016
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