Document Type

Article

Publication Date

2018

DOI

10.1051/epjconf/201817501016

Publication Title

EPJ Web of Conferences

Volume

175

Pages

01016 (17 pages)

Conference Name

International Symposium on Lattice Field Theory (Lattice 2017), Granada (Spain), 18-24 Jun 2017

Abstract

The spectrum of hadron is mainly composed as shortly-lived states (resonance) that decay onto two or more hadrons. These resonances play an important role in a variety of phenomenologically significant processes. In this talk, I give an overview on the present status of a rigorous program for studying of resonances and their properties using lattice QCD. I explain the formalism needed for extracting resonant amplitudes from the finite-volume spectra. From these one can extract the masses and widths of resonances. I present some recent examples that illustrate the power of these ideas. I then explain similar formalism that allows for the determination of resonant electroweak amplitudes from finite-volume matrix elements. I use the recent calculation of the πγ* → ππ amplitude as an example illustrating the power of this formalism. From such amplitudes one can determine transition form factors of resonances. I close by reviewing on-going efforts to generalize these ideas to increasingly complex reactions and I then give a outlook of the field.

Comments

This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0.

© The Authors, published by EDP Sciences.

Original Publication Citation

Briceño, R. A. (2018). Resonances from Lattice QCD. EPJ Web of Conferences, 175, 01016. doi:10.1051/epjconf/201817501016

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