Three-Body Dynamics of the a 1 ( 1260 ) Resonance from Lattice QCD

Mai, Maxim; Alexandru, Andrei; Brett, Ruairí; Culver, Chris; Döring, Michael; Lee, Frank X.; Sadasivan, Daniel

doi:10.1103/PhysRevLett.127.222001

Title: Three-Body Dynamics of the $a_{1} (1260)$ Resonance from Lattice QCD

Journal Article · Wed Nov 24 00:00:00 EST 2021 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.127.222001· OSTI ID:1832506

Mai, Maxim; Alexandru, Andrei;

; Culver, Chris; Döring, Michael; Lee, Frank X.;

Resonant hadronic systems often exhibit a complicated decay pattern in which three-body dynamics play a relevant or even dominant role. In this work we focus on the $$a_1(1260)$$ resonance. For the first time, the pole position and branching ratios of a three-body resonance are calculated from lattice QCD using one-, two-, and three-meson interpolators and a three-body finite-volume formalism extended to spin and coupled channels. This marks a new milestone for ab-initio studies of ordinary resonances along with hybrid and exotic hadrons involving three-body dynamics.

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

Sponsoring Organization:: USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); National Science Foundation (NSF); UK Research and Innovation Grant

Contributing Organization:: GWQCD Collaboration

Grant/Contract Number:: SC0016582; AC05-06OR23177; FG02-95ER40907; JSA-20-C0031; PHY-2012289; MR/S015418/1

OSTI ID:: 1832506

Alternate ID(s):: OSTI ID: 1838459

Report Number(s):: JLAB-THY-21-3459; DOE/OR/23177-5272; arXiv:2107.03973; PRLTAO; 222001

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Vol. 127 Journal Issue: 22; ISSN 0031-9007

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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Title: Three-Body Dynamics of the $a_{1} (1260)$ Resonance from Lattice QCD