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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.10496 |
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| _version_ | 1866911505691181056 |
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| author | De Santis, Alessandro Erb, Dominik Meyer, Harvey B. |
| author_facet | De Santis, Alessandro Erb, Dominik Meyer, Harvey B. |
| contents | Several hadronic observables are nowadays computed in lattice QCD with a sub-percent precision which requires the inclusion of strong isospin-breaking and electromagnetic effects. Most of the methods that implement the photon propagator in finite-volume lead to power-law suppressed finite-size effects and do not allow for a straightforward crosscheck against phenomenology and other calculations. Both issues can be avoided by working with a Pauli-Villars regulated photon propagator defined directly in the continuum and infinite volume. This methodology can be profitably exploited to improve the determination of leading-order electromagnetic corrections to several observables such as the HVP or nucleon masses. In this work we apply the strategy to the charged/neutral pion mass difference using CLS ensembles. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_10496 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Electromagnetic pion mass splitting using PV-regulated photon propagator De Santis, Alessandro Erb, Dominik Meyer, Harvey B. High Energy Physics - Lattice Several hadronic observables are nowadays computed in lattice QCD with a sub-percent precision which requires the inclusion of strong isospin-breaking and electromagnetic effects. Most of the methods that implement the photon propagator in finite-volume lead to power-law suppressed finite-size effects and do not allow for a straightforward crosscheck against phenomenology and other calculations. Both issues can be avoided by working with a Pauli-Villars regulated photon propagator defined directly in the continuum and infinite volume. This methodology can be profitably exploited to improve the determination of leading-order electromagnetic corrections to several observables such as the HVP or nucleon masses. In this work we apply the strategy to the charged/neutral pion mass difference using CLS ensembles. |
| title | Electromagnetic pion mass splitting using PV-regulated photon propagator |
| topic | High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2603.10496 |