On the two-body decay processes of the predicted three-body K(4307) resonance

• Published in: The journal of high energy physics 2019-05, Vol.2019 (5), p.1-24, Article 103
• Main Authors: Ren, Xiu-Lei, Malabarba, Brenda B., Khemchandani, K. P., Martínez Torres, A.
• Format: Article
• Language: English
• Subjects: Channels; Charm (particle physics); Classical and Quantum Gravitation; Decay; Elementary Particles; High energy physics; Phenomenological Models; Physics; Physics and Astronomy; QCD Phenomenology; Quantum Field Theories; Quantum Field Theory; Quantum numbers; Quantum Physics; Regular Article - Theoretical Physics; Relativity Theory; String Theory
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP05(2019)103

A bstract In a recent theoretical work, Phys. Lett. B785, 112 (2018), we proposed that a K * resonance with hidden charm content arises from the K D D ¯ ∗ dynamics, where the D D ¯ ∗ system is treated as a Z c (3900) or X (3872). With the motivation of determining its further properties, which can be observed in experiments, we now present a calculation of the decay processes of this K * , namely K * (4307), to two-body channels. Particularly, we consider the decay channels J/ψK * (892), D ¯ D s , D ¯ D s * and D ¯ ∗ D s * . The mechanisms of the decay to these channels involve triangular loops and are a consequence of the internal structure of the state. Thus, the values found for the decay widths of the proposed K * (4307) are related to its nature and should be valuable for carrying on an experimental study of the K * (4307). A K * state with such a mass (in the charmonium region) and quantum numbers is a clear manifestation of an exotic meson, since, having hidden charm (i.e., a c c ¯ pair), its mass and quantum numbers can not be explained within a quark-antiquark description.