Resonances from lattice QCD

Briceno, Raul A.

doi:10.1051/epjconf/201817501016

Title: Resonances from lattice QCD

Journal Article · Mon Mar 26 00:00:00 EDT 2018 · EPJ Web of Conferences

DOI:https://doi.org/10.1051/epjconf/201817501016· OSTI ID:1432456

Briceno, Raul A. ^[1]

Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Old Dominion Univ., Norfolk, VA (United States). Dept. of Physics

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.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-06OR23177

OSTI ID:: 1432456

Report Number(s):: JLAB-THY-17-2578; DOE/OR/23177-4236; PII: epjconf_lattice2018_01016; TRN: US1802525

Journal Information:: EPJ Web of Conferences, Vol. 175; Conference: 35. International Symposium on Lattice Field Theory (Lattice 2017), Granada (Spain), 18-24 Jun 2017; ISSN 2100-014X

Publisher:: EDP SciencesCopyright Statement

Country of Publication:: United States

Language:: English

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