Year: 2021
Type: article
Abstract: Understanding the excited light meson spectrum is vital to our understanding of how quarks and gluons bind to become hadrons. This sector is home to a plethora of states including hadrons laying outside the quark model. Distinguishing the from the rest of the spectrum would be made easier if we first had a handle on the light quark anti-quark spectrum. I present the first determination of excited light JPC=1--,2--,3-- resonances in meson-meson scattering at the SU(3) flavor point from lattice QCD. This system can be described in the context of pseudoscalar-vector elastic scattering and I determine two 1-- resonances; a lighter broader state followed by a heavier narrow state, one broad 2-- resonance, and one narrow 3-- resonance. This is the first calculation in lattice QCD that successfully extracts two resonances from the same partial wave, as well as the first calculation of a light 2-- resonance. I present the results in terms of the physical resonance eigenstates decaying into pseudoscalar-vector final states, and compare to experiment as well as a popular phenomenological model.
DOI: 10.21220/evzx-a853
Author: Johnson, Christopher
Institution: William & Mary
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: U.S. Department of Energy, Dell EMC, National Energy Research Scientific Computing Center, Office of Science, National Nuclear Security Administration, Engineering and Physical Sciences Research Council, Science and Technology Facilities Council, Advanced Scientific Computing Research, Nuclear Physics, Oak Ridge National Laboratory, Thomas Jefferson National Accelerator Facility
Awards: G1193633358, G121915436, G1645119126, G1728142190, G1796307089, G1848180026, G203625172, G2263355576, G2366088775, Peta-5: A National Facility for Petascale Data Intensive Computation and Analytics, G2504282314, G275679244, G2988778103, G3120427512, G358276009, The DiRAC 2.5x Facility, G3886122786, G4370606643, G4423657506, DiRAC 2.5 Operations 2017-2020, MESON SPECTROSCOPY FROM QCD, G5692331544, DiRAC 2.5 - the pathway to DiRAC Phase 3, G6293928997, G6427981414, G6674091005, G675320460, G7520763071, G7651947074, G816254390, G8269158468, G8906985441
OpenAlex ID: W4206888759