Abstract
The current precision reached by lattice QCD calculations of low-energy hadronic observables, requires not only the introduction of electromagnetic corrections, but also control over all the potential systematic uncertainties introduced by the lattice version of QED. Introducing a massive photon as an infrared regulator in lattice QED, provides a well defined theory, dubbed QEDM, amenable to numerical evaluation [1]. The photon mass is removed through extrapolation. In this contribution we scrutinise aspects of QEDM such as the presence and fate of the zero modes contributions and we describe the determination of the photon mass corrections in finite and infinite volume. We demonstrate that the required extrapolations are well controlled using numerical data obtained on two ensembles which only differ in volume.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | 281 |
| Tidsskrift | Proceedings of Science |
| Vol/bind | 396 |
| ISSN | 1824-8039 |
| DOI | |
| Status | Udgivet - 8. jul. 2022 |
| Begivenhed | 38th International Symposium on Lattice Field Theory, LATTICE 2021 - Virtual, Online, USA Varighed: 26. jul. 2021 → 30. jul. 2021 |
Konference
| Konference | 38th International Symposium on Lattice Field Theory, LATTICE 2021 |
|---|---|
| Land/Område | USA |
| By | Virtual, Online |
| Periode | 26/07/2021 → 30/07/2021 |
Bibliografisk note
Funding Information:This research used resources of the Oak Ridge Leadership Computing Facility, which is a DOE Office of Science User Facility supported under Contract DE-AC05-00OR22725, through the ALCC Program. This project has received funding from Marie Skłodowska-Curie grant 894103 (EU Horizon 2020). MDM and JTT are partially supported by DFF Research Project 1, grant number 8021-00122B. The work of BH and AWL was supported by the LBNL LDRD Program. AN is supported by the National Science Foundation CAREER Award Program. AS is partially supported by the National Science Foundation grant PHY-1913287.
Funding Information:
This research used resources of the Oak Ridge Leadership Computing Facility, which is a DOE Office of Science User Facility supported under Contract DE-AC05-00OR22725, through the ALCC Program. This project has received funding from Marie Skłodowska-Curie grant 894103 (EU Horizon 2020). MDM and JTT are partially supported by DFF Research Project 1, grant number 8021-00122B. The work of BH and AWL was supported by the LBNL LDRD Program. AN is supported by the National Science Foundation CAREER Award Program. AS is partially supported by the National Science Foundation grant PHY-1913287. The QED fields were generated with the code from Ref. [1]. The correlation functions were then computed with Lalibe [21] on the qedm branch. Lalibe links against the Chroma software suite [22], which utilizes QUDA [23, 24] to perform highly optimized solves of the MDWF valence propagators on NVIDIA-GPU accelerated compute nodes.
Publisher Copyright:
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