states in a unitarized coupled-channel approach

Chao-Wei Shen; Yong-hui Lin; Ulf-G. Meißner

doi:10.1140/epjc/s10052-023-11177-8

2022 Impact factor 4.4

Particles and Fields

Open Access

Eur. Phys. J. C (2023) 83: 70
https://doi.org/10.1140/epjc/s10052-023-11177-8

Regular Article - Theoretical Physics

states in a unitarized coupled-channel approach

Chao-Wei Shen¹, Yong-hui Lin²^b and Ulf-G. Meißner¹^,2^,3

¹ Institute for Advanced Simulation, Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, 52425, Jülich, Germany
² Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, 53115, Bonn, Germany
³ Tbilisi State University, 0186, Tbilisi, Georgia

^b yonghui@hiskp.uni-bonn.de

Received: 29 August 2022
Accepted: 30 December 2022
Published online: 24 January 2023

Abstract

Starting from an effective Lagrangian with heavy quark spin symmetry embedded, the coupled-channel dynamics of the doubly charmed systems is investigated. The potential underlying our investigation includes t-channel pseudoscalar and vector meson exchanges. A series of S-wave bound states with isospin is found by applying the first iterated solution of the N/D method: one state with binding energy 23 MeV in the channel, three states with binding energy 26, 30 and 7 MeV (relative to the thresholds from low to high, respectively) in the -- system and three states with binding energy 32, 8 and 16 MeV in the -- system. Those states serve as the open-charm partners of the hidden charm pentaquarks observed by the LHCb Collaboration.

© The Author(s) 2023

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