Strangeness of nucleons from $N_f=2+1+1$ lattice QCD
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866908917114601472 |
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| author | Alexandrou, Constantia Bacchio, Simone Bode, Mathis Finkenrath, Jacob Herten, Andreas Iona, Christos Koutsou, Giannis Pittler, Ferenc Prasad, Bhavna Spanoudes, Gregoris |
| author_facet | Alexandrou, Constantia Bacchio, Simone Bode, Mathis Finkenrath, Jacob Herten, Andreas Iona, Christos Koutsou, Giannis Pittler, Ferenc Prasad, Bhavna Spanoudes, Gregoris |
| contents | We present the strange electromagnetic form factors of the nucleon using lattice QCD simulations with degenerate light, a strange, and a charm quark in the sea with masses tuned to their physical values. For the first time, the strange electromagnetic form factors are computed at the continuum limit using only ensembles simulated with physical quark masses, eliminating the need for chiral extrapolations and their associated systematic uncertainty. We obtain the momentum transfer dependence of the form factors using the $z$-expansion and provide the strange electric and magnetic radii, as well as the strange magnetic moment. When combining our statistical errors and systematic uncertainties stemming from the momentum transfer dependence fit, our errors are an order of magnitude smaller than those associated with experimental determinations of the strange electromagnetic form factor. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_26600 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Strangeness of nucleons from $N_f=2+1+1$ lattice QCD Alexandrou, Constantia Bacchio, Simone Bode, Mathis Finkenrath, Jacob Herten, Andreas Iona, Christos Koutsou, Giannis Pittler, Ferenc Prasad, Bhavna Spanoudes, Gregoris High Energy Physics - Lattice We present the strange electromagnetic form factors of the nucleon using lattice QCD simulations with degenerate light, a strange, and a charm quark in the sea with masses tuned to their physical values. For the first time, the strange electromagnetic form factors are computed at the continuum limit using only ensembles simulated with physical quark masses, eliminating the need for chiral extrapolations and their associated systematic uncertainty. We obtain the momentum transfer dependence of the form factors using the $z$-expansion and provide the strange electric and magnetic radii, as well as the strange magnetic moment. When combining our statistical errors and systematic uncertainties stemming from the momentum transfer dependence fit, our errors are an order of magnitude smaller than those associated with experimental determinations of the strange electromagnetic form factor. |
| title | Strangeness of nucleons from $N_f=2+1+1$ lattice QCD |
| topic | High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2603.26600 |