Does the JPC=1+ - counterpart of the X(3872) exist?

We explore the possible existence of the J(PC) = 1(+-) counterpart of the X(3872) state in a coupled-channels calculation within a constituent quark model, with the aim of confirming the existence of the so-called (X) over tilde (3872) state observed by the COMPASS Collaboration. Two states are found in the energy region of the (X) over tilde (3872) signal, both with almost equal mixture of c (c) over bar2(1)P(1) state and D*(D) over bar(*) channels: One that can be identified as the dressed c (c) over bar2(1)P(1) and a bound state below the D (D) over bar* threshold. We provide predictions of strong and radiative decays that could help to clarify the existence of such structures. (C) 2022 The Author(s). Published by Elsevier B.V.

Automated summary

In this study, we investigate the possible existence of the J(PC) = 1(+-) counterpart of the X(3872) state using a coupled-channels calculation within a constituent quark model. The aim is to confirm the existence of the so-called (X) over tilde (3872) state observed by the COMPASS Collaboration. Two states are found in the energy region of the (X) over tilde (3872) signal, showing a nearly equal mixture of the c (c) over bar2(1)P(1) state and D*(D) over bar(*) channels. The study provides predictions of strong and radiative decays to further elucidate the existence of these structures.