Journal article

Publication year: 2022

Journal: The European Physical Journal C

Volume number: 82

Issue number: 4

ISSN: 1434-6044

eISSN: 1434-6052

Open access status: Gold

DOI Link: https://doi.org/10.1140/epjc/s10052-022-10272-6

Publisher: SpringerOpen

Abstract: 
We study the internal structure of a range of four-quark states with charm quark contributions using a two-body Bethe-Salpeter equation. Thereby, we examine charmonium-like states with hidden charm and quark content c (c) over barq (q) over bar, open-charm states with quark content cc (q) over bar(q) over bar and all-charm states with cc (c) over bar(c) over bar. In particular we study the internal competition between meson-meson components and diquark-antidiquark components in the wave functions of these states. Our results indicate that the chi(c1)(3872) and the Z(c)(3900) are predominantly D (D) over bar* states and that the recently discovered open-charm state T-cc(+) is dominated by an internal DD* component. In both cases the diquark components are negligible. For the all-charm state X (6900) with as yet unknown quantum numbers we identify candidates in the excitation spectra of 0(+) and 1(+) states. Furthermore, our framework serves to provide predictions for further, yet undiscovered open and hidden charm four-quark states.

Harvard Citation style: Santowsky, N. and Fischer, C. (2022) Four-quark states with charm quarks in a two-body Bethe-Salpeter approach, The European Physical Journal C, 82(4), Article 313. https://doi.org/10.1140/epjc/s10052-022-10272-6

APA Citation style: Santowsky, N., & Fischer, C. (2022). Four-quark states with charm quarks in a two-body Bethe-Salpeter approach. The European Physical Journal C. 82(4), Article 313. https://doi.org/10.1140/epjc/s10052-022-10272-6