Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session D04: Minisymposium: Exotic Hadrons I
9:00 AM–11:30 AM,
Wednesday, November 29, 2023
Hilton Waikoloa Village
Room: Kings 2
Chair: Elena Santopinto, INFN-Frascati Rome
Abstract: D04.00006 : Compositeness of Tcc and X(3872) with decay and coupled-channel effects
10:30 AM–10:45 AM
Presenter:
Tomona Kinugawa
(Tokyo Metropolitan University)
Authors:
Tomona Kinugawa
(Tokyo Metropolitan University)
Tetsuo Hyodo
(Tokyo Metropolitan University)
We study the compositeness of weakly bound states with the effective field theory from the viewpoint of the low-energy universality [4]. We introduce a model with the coupling of the single-channel scattering to the bare state, and study the compositeness of the bound state by varying the bare state energy. In contrast to the naive expectation from the universality, we demonstrate that a non-composite state can always be realized even with the small binding energy. At the same time, however, it is shown that a fine tuning is necessary to obtain the non-composite weakly bound state. In other words, the probability to find a model with the composite dominant state becomes larger with the decrease of the binding energy in accordance with the low-energy universality. For the application to the exotic hadrons, we then discuss the modification of the compositeness by the decay and coupled-channel effects. We quantitatively show that these contributions suppress the compositeness, because of the increase of the fraction of other components. Finally, as the examples of the near-threshold exotic hadrons, the structure of Tcc and X(3872) is studied by evaluating the compositeness. We find the importance of the coupled-channel and decay contributions for the structure of Tcc and X(3872), respectively.
[1] Y. Kamiya and T. Hyodo, PTEP 2017, 023D02 (2017).
[2] T. Kinugawa and T. Hyodo, Phys. Rev. C 106, 015205 (2022).
[3] T. Hyodo, Phys. Rev. C 90, 055208 (2014).
[4] T. Kinugawa and T. Hyodo, arXiv:2303.07038 [hep-ph].
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700