Quantum tomography of $H \to ZZ, WW$ beyond leading order
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| _version_ | 1866911531285872640 |
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| author | Aguilar-Saavedra, J. A. Giardino, Pier Paolo |
| author_facet | Aguilar-Saavedra, J. A. Giardino, Pier Paolo |
| contents | We revisit quantum tomography of $H \to ZZ$ and $H \to WW$ in the presence of higher-order corrections. We verify that neither the use of an effective spin analysing power (only for $ZZ$) or a photon veto are sufficient to render the naively-constructed spin density operators physical. A subtraction of higher-order corrections is thus necessary to perform consistent quantum tomography. Such corrections are small when compared to expected experimental uncertainties with current data. As a by-product, we point out the striking possibility to observe parity-violating effects in $H \to WW$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_11288 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Quantum tomography of $H \to ZZ, WW$ beyond leading order Aguilar-Saavedra, J. A. Giardino, Pier Paolo High Energy Physics - Phenomenology High Energy Physics - Experiment Quantum Physics We revisit quantum tomography of $H \to ZZ$ and $H \to WW$ in the presence of higher-order corrections. We verify that neither the use of an effective spin analysing power (only for $ZZ$) or a photon veto are sufficient to render the naively-constructed spin density operators physical. A subtraction of higher-order corrections is thus necessary to perform consistent quantum tomography. Such corrections are small when compared to expected experimental uncertainties with current data. As a by-product, we point out the striking possibility to observe parity-violating effects in $H \to WW$. |
| title | Quantum tomography of $H \to ZZ, WW$ beyond leading order |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Quantum Physics |
| url | https://arxiv.org/abs/2603.11288 |