Decays, contact P-wave interactions and hyperfine structure in Omega- exotic atoms
| dc.creator | Krivoruchenko, M. I. | |
| dc.creator | Faessler, Amand | |
| dc.date | 2007-07-20 | |
| dc.date | 2008-04-05 | |
| dc.date.accessioned | 2026-07-07T11:41:32Z | |
| dc.date.available | 2026-07-07T11:41:32Z | |
| dc.description | Contact $P$-wave interactions connected to the Larmor interaction of a magnetic dipole and Thomas spin precession in the filed of an electric quadrupole are described and their implications for spectroscopy of exotic $Ω^{-}$-atoms are studied. In order to evaluate the magnitude of the contact $P$-wave interactions as compared to the conventional long-range interactions and the sensitivity of spectroscopic data to the $Ω^{-}$-hyperon quadrupole moment, we consider $2P$ states of $Ω^{-}$ atoms formed with light stable nuclei with spins $I \geq 1/2$ and atomic numbers $Z \leq 10$. The energy level splitting caused by the contact interactions is 2-5 orders of magnitude smaller than the conventional long-range interactions. Strong decay widths of $pΩ^{-}$ atoms due to reactions $pΩ^{-} \to ΛΞ^{0}$ and $pΩ^{-} \to ΣΞ$, induced by $t$-channel kaon exchanges, are calculated. $Ω^{-}$ atoms formed with the light nuclei have strong widths 5-6 orders of magnitude higher than splitting caused by the contact interactions. The low-$L$ pattern in the energy spectra of intermediate- and high-$Z$ $Ω^{-}$ atoms thus cannot be observed. The $Ω^{-}$ quadrupole moment can be measured by observing $X$-rays from circular transitions between high-$L$ levels in $Ω^{-}$ exotic atoms. The effect of strong interactions in $^{208}$Pb$Ω^{-}$ atoms is negligible starting from $L \sim 10$. The contact $P$-wave interactions exist in ordinary atoms and $μ$-meson atoms. | |
| dc.description | LaTeX 49 pages, 3 eps figures, replaced with published version | |
| dc.identifier | https://arxiv.org/abs/0707.3050 | |
| dc.identifier | http://arxiv.org/abs/0707.3050 | |
| dc.identifier | Nucl.Phys.A803:173-209,2008 | |
| dc.identifier | doi:10.1016/j.nuclphysa.2008.02.002 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/200568 | |
| dc.subject | Nuclear Theory | |
| dc.subject | High Energy Physics - Experiment | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | Nuclear Experiment | |
| dc.subject | Atomic Physics | |
| dc.title | Decays, contact P-wave interactions and hyperfine structure in Omega- exotic atoms | |
| dc.type | text |