$ \bar K^0 d $ Bound State and Correlation Function
Abstract
We study the K̅0d system using a new formulation of the fixed-center approximation that preserves elastic unitarity. The resulting scattering amplitude predicts a bound state below threshold, which can be interpreted as a Λ(1380)N configuration complementary to the K-pp state associated with the higher Λ(1405) pole. The interaction is attractive, with scattering parameters of the same order as recent K-d determinations. We further calculate the K̅0d correlation function, which exhibits a characteristic structure associated with the bound state and provides a Coulomb-free observable that can be tested in future ALICE measurements. Results obtained with two different K̅N models are very similar, indicating the robustness of the predictions against the choice of the underlying interaction.
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BibTeX
@misc{bayar2026bound,
title = {{$ \bar K^0 d $ Bound State and Correlation Function}},
author = {M. Bayar and P. Encarnación and A. Feijoo and E. Oset},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.32986},
eprint = {2609.32986},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.32986},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - $ \bar K^0 d $ Bound State and Correlation Function
AU - M. Bayar
AU - P. Encarnación
AU - A. Feijoo
AU - E. Oset
PY - 2026
DA - 2026/09/26
PB - arXiv
DO - 10.48550/arxiv.2609.32986
UR - https://arxiv.org/abs/2609.32986
AB - We study the K̅^0d system using a new formulation of the fixed-center approximation that preserves elastic unitarity. The resulting scattering amplitude predicts a bound state below threshold, which can be interpreted as a Λ(1380)N configuration complementary to the K^-pp state associated with the higher Λ(1405) pole. The interaction is attractive, with scattering parameters of the same order as recent K^-d determinations. We further calculate the K̅^0d correlation function, which exhibits a characteristic structure associated with the bound state and provides a Coulomb-free observable that can be tested in future ALICE measurements. Results obtained with two different K̅N models are very similar, indicating the robustness of the predictions against the choice of the underlying interaction.
ER -