openQ*D code: a versatile tool for QCD+QED simulations

Author:

Campos Isabel,Fritzsch PatrickORCID,Hansen Martin,Marinkovic Marina Krstic,Patella Agostino,Ramos Alberto,Tantalo Nazario

Abstract

AbstractWe present the open-source package (. GitLab: https://gitlab.com/rcstar/openQxD. CSIC: https://dx.doi.org/10.20350/digitalCSIC/8591. https://hdl.handle.net/10261/173334, 2019), which has been primarily, but not uniquely, designed to perform lattice simulations of QCD+QED and QCD, with and without $$\mathrm {C}^*$$C boundary conditions, and O(a) improved Wilson fermions. The use of $$\mathrm {C}^*$$C boundary conditions in the spatial direction allows for a local and gauge-invariant formulation of QCD+QED in finite volume, and provides a theoretically clean setup to calculate isospin-breaking and radiative corrections to hadronic observables from first principles. The code is based on (Simulation program for lattice QCD ( code). https://cern.ch/luscher/openQCD, 2016) and (Numerical Stochastic Perturbation Theory ( code). https://cern.ch/luscher/NSPT, 2017). In particular it inherits from several core features, e.g. the highly optimized Dirac operator, the locally deflated solver, the frequency splitting for the RHMC, or the 4th order OMF integrator.

Publisher

Springer Science and Business Media LLC

Subject

Physics and Astronomy (miscellaneous),Engineering (miscellaneous)

Reference59 articles.

1. (RC*), I. Campos, P. Fritzsch, M. Hansen, M. Krstić Marinković, A. Patella, A. Ramos et al., “openQ*D.” GitLab: https://gitlab.com/rcstar/openQxD. CSIC: https://dx.doi.org/10.20350/digitalCSIC/8591. https://hdl.handle.net/10261/173334 (2019)

2. Simulation program for lattice QCD (openQCD code) (2016). https://cern.ch/luscher/openQCD

3. Numerical Stochastic Perturbation Theory (NSPT code) (2017). https://cern.ch/luscher/NSPT

4. (Flavour Lattice Averaging Group), S. Aoki et al., FLAG Review (2019). arXiv:1902.08191

5. V. Cirigliano, G. Ecker, H. Neufeld, A. Pich, J. Portoles, Kaon decays in the standard model. Rev. Mod. Phys. 84, 399 (2012). arXiv:1107.6001

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