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Isospin-breaking co...
Isospin-breaking corrections to light-meson leptonic decays from lattice simulations at physical quark masses
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- Boyle, Peter (author)
- University of Edinburgh
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- Di Carlo, Matteo (author)
- University of Edinburgh
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- Erben, Felix (author)
- University of Edinburgh
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- Gülpers, Vera (author)
- University of Edinburgh
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- Hansen, Maxwell T. (author)
- University of Edinburgh
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- Harris, Tim (author)
- University of Edinburgh
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- Hermansson-Truedsson, Nils (author)
- Lund University,Lunds universitet,Teoretisk partikelfysik - Geonomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Theoretical Particle Physics - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science,University of Bern
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- Hodgson, Raoul (author)
- University of Edinburgh
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- Jüttner, Andreas (author)
- CERN,University of Southampton
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- hÓgáin, Fionn (author)
- University of Edinburgh
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- Portelli, Antonin (author)
- University of Edinburgh
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- Richings, James (author)
- University of Edinburgh,University of Southampton
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- Yong, Andrew Zhen Ning (author)
- University of Edinburgh
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Journal of High Energy Physics. - 1029-8479. ; 2023:2
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http://dx.doi.org/10... (free)
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Abstract
Subject headings
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- The decreasing uncertainties in theoretical predictions and experimental measurements of several hadronic observables related to weak processes, which in many cases are now smaller than O(1%), require theoretical calculations to include subleading corrections that were neglected so far. Precise determinations of leptonic and semi-leptonic decay rates, including QED and strong isospin-breaking effects, can play a central role in solving the current tensions in the first-row unitarity of the CKM matrix. In this work we present the first RBC/UKQCD lattice calculation of the isospin-breaking corrections to the ratio of leptonic decay rates of kaons and pions into muons and neutrinos. The calculation is performed at fixed lattice spacing (a−1 ≃ 1.730 GeV) on a 483× 96 volume with Nf = 2 + 1 dynamical quarks close to the physical point and domain wall fermions in the Möbius formulation are employed. Long-distance QED interactions are included according to the QEDL prescription and the crucial role of finite-volume electromagnetic corrections in the determination of leptonic decay rates, which produce a large systematic uncertainty, is extensively discussed. Finally, we study the different sources of uncertainty on |Vus|/|Vud| and observe that, if finite-volume systematics can be reduced, the error from isospin-breaking corrections is potentially sub-dominant in the final precision of the ratio of the CKM matrix elements.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Keyword
- CKM Parameters
- Hadronic Matrix Elements and Weak Decays
- Lattice QCD
- Standard Model Parameters
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Boyle, Peter
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Di Carlo, Matteo
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Erben, Felix
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Gülpers, Vera
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Hansen, Maxwell ...
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Harris, Tim
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show more...
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Hermansson-Trued ...
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Hodgson, Raoul
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Jüttner, Andreas
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hÓgáin, Fionn
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Portelli, Antoni ...
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Richings, James
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Yong, Andrew Zhe ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Subatomic Physic ...
- Articles in the publication
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Journal of High ...
- By the university
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Lund University