In these proceedings we present preliminary results for the masses of the proton, neutron and Ω− baryons obtained from QCD+QED lattice simulations performed with four dynamical quarks using C∗ boundary conditions. These results are part of the ongoing effort of the RC∗ collaboration discussed in the companion proceedings [1], and have been obtained on a single ensemble in which the renormalised electromagnetic coupling is αem ∼ 0.04, the physical volume is L ∼ 1.7 fm and the masses of the four dynamical quarks have been tuned at the U-spin symmetric point md = ms. We demonstrate on this unphysical ensemble that baryon masses can be calculated with satisfactory precision when including QED without the need for gauge-fixing and perturbation theory. This makes us confident in the effectiveness of the strategy presented here also in the case of simulations closer to the physical point.

Bushnaq, L., Campos, I., Catillo, M., Cotellucci, A., Dale, M., Fritzsch, P., et al. (2022). Baryon masses from full QCD+QEDC simulations. POS PROCEEDINGS OF SCIENCE, 396 [10.22323/1.396.0373].

Baryon masses from full QCD+QEDC simulations

Tantalo N.
2022-01-01

Abstract

In these proceedings we present preliminary results for the masses of the proton, neutron and Ω− baryons obtained from QCD+QED lattice simulations performed with four dynamical quarks using C∗ boundary conditions. These results are part of the ongoing effort of the RC∗ collaboration discussed in the companion proceedings [1], and have been obtained on a single ensemble in which the renormalised electromagnetic coupling is αem ∼ 0.04, the physical volume is L ∼ 1.7 fm and the masses of the four dynamical quarks have been tuned at the U-spin symmetric point md = ms. We demonstrate on this unphysical ensemble that baryon masses can be calculated with satisfactory precision when including QED without the need for gauge-fixing and perturbation theory. This makes us confident in the effectiveness of the strategy presented here also in the case of simulations closer to the physical point.
2022
Pubblicato
Rilevanza internazionale
Articolo
Comitato scientifico
Settore FIS/02 - FISICA TEORICA, MODELLI E METODI MATEMATICI
English
Bushnaq, L., Campos, I., Catillo, M., Cotellucci, A., Dale, M., Fritzsch, P., et al. (2022). Baryon masses from full QCD+QEDC simulations. POS PROCEEDINGS OF SCIENCE, 396 [10.22323/1.396.0373].
Bushnaq, L; Campos, I; Catillo, M; Cotellucci, A; Dale, M; Fritzsch, P; Lucke, J; Marinkovic, Mk; Patella, A; Tantalo, N
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/314440
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