Full quantum tomography of top quark decays
Fuente:
arXiv
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866913426142396416 |
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| author | Aguilar-Saavedra, J. A. |
| author_facet | Aguilar-Saavedra, J. A. |
| contents | Quantum tomography in high-energy physics processes has usually been restricted to the spin degrees of freedom. We address the case of top quark decays $t \to W b$, in which the orbital angular momentum ($L$) and the spins of $W$ and $b$ are intertwined into a 54-dimensional $LWb$ density operator. The entanglement between $L$ and the $W$ or $b$ spin is large and could be determined for decays of single top quarks produced at the Large Hadron Collider with Run 2 data. With the foreseen statistical and systematic uncertainties, the significance is well above $5σ$ from the separability hypothesis for $L$-$W$ entanglement, and $3.2σ$ for $L$-$b$. These would be the first entanglement measurements between orbital and spin angular momenta in high-energy physics. Likewise, the genuine tripartite entanglement between $L$ and the two spins could be established with more than $5σ$. The method presented paves the way for similar measurements in other processes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_14725 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Full quantum tomography of top quark decays Aguilar-Saavedra, J. A. High Energy Physics - Phenomenology High Energy Physics - Experiment Quantum Physics Quantum tomography in high-energy physics processes has usually been restricted to the spin degrees of freedom. We address the case of top quark decays $t \to W b$, in which the orbital angular momentum ($L$) and the spins of $W$ and $b$ are intertwined into a 54-dimensional $LWb$ density operator. The entanglement between $L$ and the $W$ or $b$ spin is large and could be determined for decays of single top quarks produced at the Large Hadron Collider with Run 2 data. With the foreseen statistical and systematic uncertainties, the significance is well above $5σ$ from the separability hypothesis for $L$-$W$ entanglement, and $3.2σ$ for $L$-$b$. These would be the first entanglement measurements between orbital and spin angular momenta in high-energy physics. Likewise, the genuine tripartite entanglement between $L$ and the two spins could be established with more than $5σ$. The method presented paves the way for similar measurements in other processes. |
| title | Full quantum tomography of top quark decays |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Quantum Physics |
| url | https://arxiv.org/abs/2402.14725 |