Energy-Dependent Scattering Amplitude from QCD
Open Access
- 5 January 2021
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 126 (1), 012001
- https://doi.org/10.1103/physrevlett.126.012001
Abstract
Focusing on three-pion states with maximal isospin (), we present the first nonperturbative determination of an energy-dependent three-hadron scattering amplitude from first-principles QCD. The calculation combines finite-volume three-hadron energies, extracted using numerical lattice QCD, with a relativistic finite-volume formalism, required to interpret the results. To fully implement the latter, we also solve integral equations that relate an intermediate three-body matrix to the physical three-hadron scattering amplitude. The resulting amplitude shows rich analytic structure and a complicated dependence on the two-pion invariant masses, represented here via Dalitz-like plots of the scattering rate.
Keywords
Funding Information
- U.S. Department of Energy (DE-AC05-06OR23177, de-sc0019229, DE-AC05-00OR22725, DE-AC02-05CH11231)
- Science and Technology Facilities Council (ST/P000681/1)
- Royal Society
- CERN
- Oak Ridge National Laboratory
- University of Texas at Austin
- National Science Foundation
- National Energy Research Scientific Computing Center
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