One or two poles for the $\Xi(1820)$?
High Energy Physics - Phenomenology
2024-11-15 v1
Abstract
In this talk, we present a new interpretation for the recently observed resonance. We recall that the chiral unitary approach for the interaction of pseudoscalar mesons with the baryons of the decuplet predicts two states for the resonance, one with a narrow width and the other one with a large width. We contrast this fact with the recent BESIII measurement of the mass distribution in the decay to , which demands a width much larger than the average of the PDG, and show how the consideration of the two states provides a natural explanation to this apparent contradiction.
Cite
@article{arxiv.2411.09610,
title = {One or two poles for the $\Xi(1820)$?},
author = {R. Molina and Wei-Hong Liang and Chu-Wen Xiao and Zhi-Feng Sun and E. Oset},
journal= {arXiv preprint arXiv:2411.09610},
year = {2024}
}
Comments
Proceeding of the QNP 2024 Conference. 6 pages, 3 figures, 1 table. arXiv admin note: substantial text overlap with arXiv:2309.03618