χc0 production in Λ̅n scattering process
Abstract
In the present work, we investigate the production of χc0 in the Λ̅ n → χc0 K0S process by utilizing an effective Lagrangian approach. Based on the χc0 → n K0S Λ̅ decay observed by the BESIII Collaboration, the coupling constants are determined by fitting the MK0S Λ̅ and Mn K0S invariant mass spectra, where eight N and Λ state are considered. Moreover, the parameters β is taken to be 1, 2, 3 as special cases to check the parameter dependence. Our results show that two clear structures can be observed in both MK0S Λ̅ and Mn K0S invariant mass spectra, which should correspond to $N(1720)/N(1895)$ and $Λ(1600)/Λ(1890)$, respectively. In addition, the contributions from N(938) and Λ(1116) intermediate states are much smaller than those of the above-threshold resonances. With the fitted parameters for β=1, 2, 3, the cross sections for Λ̅ n → χc0 K0S are estimated to be 1.9 nb, 4.2 nb, and 8.0 nb at √s=6 GeV, respectively. Furthermore, our estimations indicate that the differential cross sections for Λ̅ n → χc0 K0S reach a maximum in the forward angle region.
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BibTeX
@misc{guo2026χc0,
title = {{$χ_c0$ production in $\barΛn$ scattering process}},
author = {Quan-Yun Guo and Zhuo Yu and Dian-Yong Chen},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.14725},
eprint = {2610.14725},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.14725},
}
RIS
TY - UNPB
TI - χ_c0 production in Λ̅n scattering process
AU - Quan-Yun Guo
AU - Zhuo Yu
AU - Dian-Yong Chen
PY - 2026
DA - 2026/10/10
PB - arXiv
DO - 10.48550/arxiv.2610.14725
UR - https://arxiv.org/abs/2610.14725
AB - In the present work, we investigate the production of χ_c0 in the Λ̅ n → χ_c0 K^0_S process by utilizing an effective Lagrangian approach. Based on the χ_c0 → n K^0_S Λ̅ decay observed by the BESIII Collaboration, the coupling constants are determined by fitting the M_K^0_S Λ̅ and M_n K^0_S invariant mass spectra, where eight N and Λ state are considered. Moreover, the parameters β is taken to be 1, 2, 3 as special cases to check the parameter dependence. Our results show that two clear structures can be observed in both M_K^0_S Λ̅ and M_n K^0_S invariant mass spectra, which should correspond to $N(1720)/N(1895)$ and $Λ(1600)/Λ(1890)$, respectively. In addition, the contributions from N(938) and Λ(1116) intermediate states are much smaller than those of the above-threshold resonances. With the fitted parameters for β=1, 2, 3, the cross sections for Λ̅ n → χ_c0 K^0_S are estimated to be 1.9 nb, 4.2 nb, and 8.0 nb at √s=6 GeV, respectively. Furthermore, our estimations indicate that the differential cross sections for Λ̅ n → χ_c0 K^0_S reach a maximum in the forward angle region.
ER -