Split-even approach to the rare kaon decay $K \to π\ell^+ \ell^-$
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915129432473600 |
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| author | Hodgson, Raoul Gülpers, Vera Hill, Ryan Portelli, Antonin |
| author_facet | Hodgson, Raoul Gülpers, Vera Hill, Ryan Portelli, Antonin |
| contents | In recent years the rare kaon decay has been computed directly at the physical point. However, this calculation is currently limited by stochastic noise stemming from a light and charm quark loop GIM subtraction. The split-even approach is an alternative estimator for such loop differences, and has shown a large variance reduction in certain quantities. We present an investigation into the use of the split-even estimator in the calculation of the rare kaon decay. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2501_18358 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Split-even approach to the rare kaon decay $K \to π\ell^+ \ell^-$ Hodgson, Raoul Gülpers, Vera Hill, Ryan Portelli, Antonin High Energy Physics - Lattice High Energy Physics - Phenomenology In recent years the rare kaon decay has been computed directly at the physical point. However, this calculation is currently limited by stochastic noise stemming from a light and charm quark loop GIM subtraction. The split-even approach is an alternative estimator for such loop differences, and has shown a large variance reduction in certain quantities. We present an investigation into the use of the split-even estimator in the calculation of the rare kaon decay. |
| title | Split-even approach to the rare kaon decay $K \to π\ell^+ \ell^-$ |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2501.18358 |