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Lattice QCD studies of the $$\Delta$$ baryon resonance and the $$K_0^\ast(700)$$ and $$a_0(980)$$ meson resonances: the role of exotic operators in determining the finite-volume spectrum

https://doi.org/10.22323/1.453.0074

Skinner, Sarah; Bulava, John; Darvish, Danny; Hanlon, Andrew D.; Hoerz, Ben; Morningstar, Colin; Nicholson, Amy; Romero-Lopez, Fernando; Vranas, Pavlos; Walker-Loud, André (December 2023, Pos proceedings of science)

This work presents technical details of determining the finite-volume energy spectra for the scattering amplitude of the coupled-channel πΣ−K¯N from lattice QCD data. The importance of reliably extracting such spectra lies in the crucial dependence of the hadronic scattering amplitudes analysis on the energy spectrum when using L\"{u}scher's formalism. Results of the methods used are presented and the final finite-volume spectra are shown. The analysis of the scattering amplitude based on these results, exhibits a two-pole structure for the Λ(1405), a virtual bound state below the πΣ threshold and a resonance pole right below the K¯N threshold.
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Elastic nucleon-pion scattering at m = 200 MeV from lattice QCD

https://doi.org/10.1016/j.nuclphysb.2023.116105

Bulava, John; Hanlon, Andrew D.; Hörz, Ben; Morningstar, Colin; Nicholson, Amy; Romero-López, Fernando; Skinner, Sarah; Vranas, Pavlos; Walker-Loud, André (February 2023, Nuclear Physics B)

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Nucleon Axial Form Factor from Domain Wall on HISQ

https://doi.org/10.22323/1.396.0081

Meyer, Aaron; Berkowitz, Evan; Bouchard, Chris; Chang, Chia; Clark, MA; Hörz, Ben; Howarth, Dean; Körber, Christopher; Monge-Camacho, Henry; Nicholson, Amy; et al (May 2022, Sissa Medialab)
Towards grounding nuclear physics in QCD

https://doi.org/10.1016/j.ppnp.2021.103888

Drischler, Christian; Haxton, Wick; McElvain, Kenneth; Mereghetti, Emanuele; Nicholson, Amy; Vranas, Pavlos; Walker-Loud, André (June 2021, Progress in Particle and Nuclear Physics)
null (Ed.)
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Two-nucleon $S$ -wave interactions at the SU(3) flavor-symmetric point with $m_{u d} \approx m_{s}^{phys}$ : A first lattice QCD calculation with the stochastic Laplacian Heaviside method

https://doi.org/10.1103/PhysRevC.103.014003

Hörz, Ben; Howarth, Dean; Rinaldi, Enrico; Hanlon, Andrew; Chang, Chia Cheng; Körber, Christopher; Berkowitz, Evan; Bulava, John; Clark, M. A.; Lee, Wayne Tai; et al (January 2021, Physical Review C)
null (Ed.)
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