Towards a high-precision description of the $\rho$ and K* resonances

Lachini, Nelson Pitanga; Boyle, Peter; Erben, Felix; Gülpers, Vera; Hansen, Maxwell T.; Joswig, Fabian; Marshall, Michael; Portelli, Antonin

doi:10.22323/1.451.0017

Towards a high-precision description of the $\rho$ and K* resonances

Nelson Pitanga Lachini
(
- Edinburgh U. and
- Cambridge U., DAMTP
)
,
Peter Boyle
(
- Edinburgh U. and
- Brookhaven
)
,
Felix Erben
(
- Edinburgh U. and
- CERN
)
,
Vera Gülpers
(
- Edinburgh U.
)
,
Maxwell T. Hansen
(
- Edinburgh U.
)

Nov 30, 2024

15 pages

Published in:

PoS EuroPLEx2023 (2024) 017

Contribution to:

- EuroPLEx2023
, 017

Published: Nov 30, 2024

DOI:

10.22323/1.451.0017

pdf

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Abstract: (SISSA)

We summarise our determination of the

\rho

and

K^*

resonance parameters from lattice QCD at a physical pion mass. The methods for computing correlation functions and extracting energy levels from an RBC-UKQCD domain-wall fermion ensemble are reviewed. We use the finite-volume spectra from lattice irreducible representations with only leading

P

-wave contributions to constrain the elastic

K\pi

and

\pi\pi

scattering amplitudes and the associated resonance pole positions. Lastly, our estimation of systematic errors through a model-averaging technique is outlined and a conclusion is given.

References(60)

Figures(0)

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