bar{K} + N \to K + \Xi$ reaction and $S=-1$ hyperon resonances
Phys. Rev. C 91, 065208 (2015) The $\bar{K} + N \to K + \Xi$ reaction is studied for center-of-momentum energies ranging from threshold to 3 GeV in an effective Lagrangian approach that includes the hyperon $s$- and $u$-channel contributions as well as a phenomenological contact amplitude. The latte...
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Abstract | Phys. Rev. C 91, 065208 (2015) The $\bar{K} + N \to K + \Xi$ reaction is studied for center-of-momentum
energies ranging from threshold to 3 GeV in an effective Lagrangian approach
that includes the hyperon $s$- and $u$-channel contributions as well as a
phenomenological contact amplitude. The latter accounts for the rescattering
term in the scattering equation and possible short-range dynamics not included
explicitly in the model. Existing data are well reproduced and three
above-the-threshold resonances were found to be required to describe the data,
namely, the $\Lambda(1890)$, $\Sigma(2030)$, and $\Sigma(2250)$. For the latter
resonance we have assumed the spin-parity of $J^P=5/2^-$ and a mass of 2265
MeV. The $\Sigma(2030)$ resonance is crucial in achieving a good reproduction
of not only the measured total and differential cross sections, but also the
recoil polarization asymmetry. More precise data are required before a more
definitive statement can be made about the other two resonances, in particular,
about the $\Sigma(2250)$ resonance that is introduced to describe a small bump
structure observed in the total cross section of $K^- + p \to K^+ + \Xi^-$. The
present analysis also reveals a peculiar behavior of the total cross section
data in the threshold energy region in $K^- + p \to K^+ + \Xi^-$, where the
$P$- and $D$-waves dominate instead of the usual $S$-wave. Predictions for the
target-recoil asymmetries of the $\bar{K} + N \to K + \Xi$ reaction are also
presented. |
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AbstractList | Phys. Rev. C 91, 065208 (2015) The $\bar{K} + N \to K + \Xi$ reaction is studied for center-of-momentum
energies ranging from threshold to 3 GeV in an effective Lagrangian approach
that includes the hyperon $s$- and $u$-channel contributions as well as a
phenomenological contact amplitude. The latter accounts for the rescattering
term in the scattering equation and possible short-range dynamics not included
explicitly in the model. Existing data are well reproduced and three
above-the-threshold resonances were found to be required to describe the data,
namely, the $\Lambda(1890)$, $\Sigma(2030)$, and $\Sigma(2250)$. For the latter
resonance we have assumed the spin-parity of $J^P=5/2^-$ and a mass of 2265
MeV. The $\Sigma(2030)$ resonance is crucial in achieving a good reproduction
of not only the measured total and differential cross sections, but also the
recoil polarization asymmetry. More precise data are required before a more
definitive statement can be made about the other two resonances, in particular,
about the $\Sigma(2250)$ resonance that is introduced to describe a small bump
structure observed in the total cross section of $K^- + p \to K^+ + \Xi^-$. The
present analysis also reveals a peculiar behavior of the total cross section
data in the threshold energy region in $K^- + p \to K^+ + \Xi^-$, where the
$P$- and $D$-waves dominate instead of the usual $S$-wave. Predictions for the
target-recoil asymmetries of the $\bar{K} + N \to K + \Xi$ reaction are also
presented. |
Author | Oh, Yongseok Nakayama, K Jackson, Benjamin C Haberzettl, H |
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BackLink | https://doi.org/10.1103/PhysRevC.91.065208$$DView published paper (Access to full text may be restricted) https://doi.org/10.48550/arXiv.1503.00845$$DView paper in arXiv |
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Snippet | Phys. Rev. C 91, 065208 (2015) The $\bar{K} + N \to K + \Xi$ reaction is studied for center-of-momentum
energies ranging from threshold to 3 GeV in an... |
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SubjectTerms | Physics - High Energy Physics - Phenomenology Physics - Nuclear Theory |
Title | bar{K} + N \to K + \Xi$ reaction and $S=-1$ hyperon resonances |
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