Hauptseite > Publikationsdatenbank > On the structure in the ΛN cross section at the ΣN threshold > print |
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082 | _ | _ | |a 530 |
100 | 1 | _ | |a Haidenbauer, Johann |0 P:(DE-Juel1)131179 |b 0 |e Corresponding author |
245 | _ | _ | |a On the structure in the ΛN cross section at the ΣN threshold |
260 | _ | _ | |a Bristol [u.a.] |c 2021 |b IOP Publ. |
336 | 7 | _ | |a article |2 DRIVER |
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336 | 7 | _ | |a ARTICLE |2 BibTeX |
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336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
520 | _ | _ | |a The complexity of threshold phenomena is exemplified on a prominent and long-known case - the structure in the $\Lambda p$ cross section (invariant mass spectrum) at the opening of the $\Sigma N$ channel. The mass splitting between the $\Sigma$ baryons together with the angular momentum coupling in the $^3S_1$- $^3D_1$ partial wave imply that, in principle, up to six channels are involved. Utilizing hyperon-nucleon potentials that provide an excellent description of the available low-energy $\Lambda p$ and $\Sigma N$ scattering data, the shape of the resulting $\Lambda p$ cross section is discussed and the poles near the $\Sigma N$ threshold are determined. Evidence for a strangeness $S=-1$ dibaryon is provided, in the form of a (unstable) $\Sigma N$ bound state in the vicinity of the $\Sigma N$ threshold. Predictions for level shifts and widths of $\Sigma^-p$ atomic states are given. |
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700 | 1 | _ | |a Meißner, Ulf-G. |0 P:(DE-Juel1)131252 |b 1 |u fzj |
773 | _ | _ | |a 10.1088/1674-1137/ac0e89 |g Vol. 45, no. 9, p. 094104 - |0 PERI:(DE-600)2491278-5 |n 9 |p 094104 - |t Chinese physics / C |v 45 |y 2021 |x 2058-6132 |
856 | 4 | _ | |u https://juser.fz-juelich.de/record/897208/files/Haidenbauer_2021_Chinese_Phys._C_45_094104.pdf |y OpenAccess |
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