PoS - Proceedings of Science
Volume 430 - The 39th International Symposium on Lattice Field Theory (LATTICE2022) - Hadron Spectroscopy and Interactions
Towards $K\pi$ scattering with domain-wall fermions at the physical point using distillation
N.P. Lachini*, P. Boyle, F. Erben, M. Marshall and A. Portelli
Full text: pdf
Pre-published on: March 15, 2023
Published on: April 06, 2023
Resonances play an important role in Standard Model phenomenology. In particular, hadronic resonances feature in $B$ and $D$ decays, which can be central for New Physics searches. Lattice QCD simulations combined with the finite-volume method can nowadays be used to reliably study strongly coupled scattering processes such as $K\pi$ and thus the hadronic resonance $K^*$. In this work, we approach $K\pi$ scattering on a domain-wall $N_f = 2+1$ RBC-UKQCD
ensemble at a physical pion mass. We use the distillation method within Grid and Hadrons software to compute sets of operator basis. That allows solving an eigenvalue problem to extract the low-energy finite-volume spectra, which are then translated into scattering information. We update the state of the calculation by reviewing the smearing process, outlining the variational analysis and concluding by showing preliminary data.
DOI: https://doi.org/10.22323/1.430.0076
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