$H$ dibaryon and its cousins from SU(6)-constrained baryon-baryon interaction
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| Format: | Preprint |
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2026
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| _version_ | 1866909996831211520 |
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| author | Hu, Tao-Ran Guo, Feng-Kun |
| author_facet | Hu, Tao-Ran Guo, Feng-Kun |
| contents | We constrain the $S$-wave baryon-baryon interaction using SU(6) symmetry within a nonrelativistic effective field theory. The most general leading-order Lagrangian contains two independent parameters, which we determine using physical $NN$ and lattice QCD $ΩΩ$ scattering lengths. This framework allows for parameter-free predictions in the strangeness $S=-2$ sector relevant to the $H$ dibaryon. Solving the coupled-channel scattering problem, we identify two bound states below the $ΛΛ$ threshold, one deeply bound and one shallow, along with resonances near the $ΣΣ$ and $Σ^*Σ^*$ thresholds. We demonstrate that these poles result in distinct enhancements in $ΛΛ$ invariant mass distributions, suggesting that the $H$ dibaryon exists as a multichannel bound state and providing clear signatures for experimental verification. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2601_14922 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | $H$ dibaryon and its cousins from SU(6)-constrained baryon-baryon interaction Hu, Tao-Ran Guo, Feng-Kun Nuclear Theory High Energy Physics - Experiment High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Experiment We constrain the $S$-wave baryon-baryon interaction using SU(6) symmetry within a nonrelativistic effective field theory. The most general leading-order Lagrangian contains two independent parameters, which we determine using physical $NN$ and lattice QCD $ΩΩ$ scattering lengths. This framework allows for parameter-free predictions in the strangeness $S=-2$ sector relevant to the $H$ dibaryon. Solving the coupled-channel scattering problem, we identify two bound states below the $ΛΛ$ threshold, one deeply bound and one shallow, along with resonances near the $ΣΣ$ and $Σ^*Σ^*$ thresholds. We demonstrate that these poles result in distinct enhancements in $ΛΛ$ invariant mass distributions, suggesting that the $H$ dibaryon exists as a multichannel bound state and providing clear signatures for experimental verification. |
| title | $H$ dibaryon and its cousins from SU(6)-constrained baryon-baryon interaction |
| topic | Nuclear Theory High Energy Physics - Experiment High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Experiment |
| url | https://arxiv.org/abs/2601.14922 |