New insights into the doubly charmed exotic mesons

• Published in: The European physical journal. C, Particles and fields Vol. 85; no. 4; pp. 389 - 7
• Main Authors: Guo, Di, Yang, Qin-He, Dai, Ling-Yun, Szczepaniak, A. P.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 05.04.2025; Springer Nature B.V; Springer Science + Business Media; SpringerOpen
• Subjects: Astronomy; Astrophysics and Cosmology; Charm (particle physics); Elementary Particles; Hadrons; Heavy Ions; Lagrangian function; Letter; Mass spectra; Measurement Science and Instrumentation; Mesons; Nuclear Energy; Nuclear Physics; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quarks; String Theory; Symmetry
• ISSN: 1434-6052; 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-025-14111-2

Using effective Lagrangians constrained by the heavy quark spin symmetry and chiral symmetry, for the light quarks, we analyze the D 0 D 0 π + , D ¯ 0 D 0 π 0 and D 0 D ¯ ∗ 0 invariant mass spectra. Performing a simultaneous analysis of the doubly charmed and charm-anti-charm states gives further insights into the nature of the T cc + and χ c 1 0 ( 3872 ) , exotic hadrons. It is confirmed that both states should lie below their respective D D ∗ / D D ¯ ∗ thresholds. Also, the contributions of the triangle and box diagrams are negligible.