[2301.03995] Efficiently unquenching QCD+QED at O($α$) Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search High Energy Physics - Lattice arXiv:2301.03995 (hep-lat) [Submitted on 10 Jan 2023 ( v1 ), last revised 1 May 2026 (this version, v2)] Title: Efficiently unquenching QCD+QED at O($α$) Authors: Tim Harris , Vera Gülpers , Antonin Portelli , James Richings View a PDF of the paper titled Efficiently unquenching QCD+QED at O($\alpha$), by Tim Harris and 3 other authors View PDF HTML (experimental) Abstract: We outline a strategy to efficiently include the electromagnetic interactions of the sea quarks in QCD+QED. When computing iso-spin breaking corrections to hadronic quantities at leading order in the electromagnetic coupling, the sea-quark charges result in quark-line disconnected diagrams which are challenging to compute precisely. An analysis of the variance of stochastic estimators for the relevant traces of quark propagators helps us to improve the situation for certain flavour combinations and space-time decompositions. We present preliminary numerical results for the variances of the corresponding contributions using an ensemble of $N_\mathrm{f}=2+1$ domain-wall fermions generated by the RBC/UKQCD collaboration. Comments: Fixed typos in eq. (8). 9 pages, 3 figures; contribution to the 39th International Symposium on Lattice Field Theory, Lattice 2022, Bonn, Germany Subjects: High Energy Physics - Lattice (hep-lat) Cite as: arXiv:2301.03995 [hep-lat] (or arXiv:2301.03995v2 [hep-lat] for this version) https://doi.org/10.48550/arXiv.2301.03995 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Tim Harris [ view email ] [v1] Tue, 10 Jan 2023 14:40:44 UTC (233 KB) [v2] Fri, 1 May 2026 13:48:58 UTC (228 KB) Full-text links: Access Paper: View a PDF of the paper titled Efficiently unquenching QCD+QED at O($\alpha$), by Tim Harris and 3 other authors View PDF HTML (experimental) TeX Source view license Current browse context: hep-lat < prev | next > new | recent | 2023-01 References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer ( What is the Explorer? ) Connected Papers Toggle Connected Papers ( What is Connected Papers? ) Litmaps Toggle Litmaps ( What is Litmaps? ) scite.ai Toggle scite Smart Citations ( What are Smart Citations? ) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv ( What is alphaXiv? ) Links to Code Toggle CatalyzeX Code Finder for Papers ( What is CatalyzeX? ) DagsHub Toggle DagsHub ( What is DagsHub? ) GotitPub Toggle Gotit.pub ( What is GotitPub? ) Huggingface Toggle Hugging Face ( What is Huggingface? ) ScienceCast Toggle ScienceCast ( What is ScienceCast? ) Demos Demos Replicate Toggle Replicate ( What is Replicate? ) Spaces Toggle Hugging Face Spaces ( What is Spaces? ) Spaces Toggle TXYZ.AI ( What is TXYZ.AI? ) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower ( What are Influence Flowers? ) Core recommender toggle CORE Recommender ( What is CORE? ) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs . Which authors of this paper are endorsers? | Disable MathJax ( What is MathJax? ) We gratefully acknowledge support from our major funders , member institutions , , and all contributors. About · Help · Contact · Subscribe · Copyright · Privacy · Accessibility · Operational Status (opens in new tab) Major funding support from