Resonances from lattice QCD
The spectrum of hadron is mainly composed as shortlylived 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 finitevolume 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 finitevolume 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 ongoing efforts to generalize these ideas to increasingly complex reactions and I then give a outlook of the field.
 Authors:

^{[1]}
 Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Old Dominion Univ., Norfolk, VA (United States). Dept. of Physics
 Publication Date:
 Report Number(s):
 JLABTHY172578; DOE/OR/231774236
Journal ID: ISSN 2100014X; PII: epjconf_lattice2018_01016
 Grant/Contract Number:
 AC0506OR23177
 Type:
 Accepted Manuscript
 Journal Name:
 EPJ Web of Conferences
 Additional Journal Information:
 Journal Volume: 175; Conference: 35. International Symposium on Lattice Field Theory (Lattice 2017), Granada (Spain), 1824 Jun 2017; Journal ID: ISSN 2100014X
 Publisher:
 EDP Sciences
 Research Org:
 Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
 Sponsoring Org:
 USDOE
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
 OSTI Identifier:
 1432456
Briceno, Raul A. Resonances from lattice QCD. United States: N. p.,
Web. doi:10.1051/epjconf/201817501016.
Briceno, Raul A. Resonances from lattice QCD. United States. doi:10.1051/epjconf/201817501016.
Briceno, Raul A. 2018.
"Resonances from lattice QCD". United States.
doi:10.1051/epjconf/201817501016. https://www.osti.gov/servlets/purl/1432456.
@article{osti_1432456,
title = {Resonances from lattice QCD},
author = {Briceno, Raul A.},
abstractNote = {The spectrum of hadron is mainly composed as shortlylived 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 finitevolume 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 finitevolume 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 ongoing efforts to generalize these ideas to increasingly complex reactions and I then give a outlook of the field.},
doi = {10.1051/epjconf/201817501016},
journal = {EPJ Web of Conferences},
number = ,
volume = 175,
place = {United States},
year = {2018},
month = {3}
}