Year: 2026
Type: article
Abstract: A model of hybrid meson structure based on the QCD Hamiltonian in Coulomb gauge and a single constituent quasigluon is applied to the computation of hadronic decays of mesons with exotic quantum numbers, $$0^{+-}$$ 0 + - and $$2^{+-}$$ 2 + - . These correspond to hybrid mesons in which the gluon couples to a $$q\bar{q}$$ q q ¯ pair in an P -wave and can therefore be identified as orbital excitations of the exotic $$1^{-+}$$ 1 - + state. Interestingly, we find $$0^{+-}$$ 0 + - states to be narrow, contrary to what was found by previous calculations. This is primarily due to the suppression of the decay mode $$0^{+-}\rightarrow 2^1S_0+1^1S_0$$ 0 + - → 2 1 S 0 + 1 1 S 0 , which is unique to our model. The $$2^{+-}$$ 2 + - states are found to be narrow, as expected.
Source: The European Physical Journal C
Authors: Christian Farina, Eric S. Swanson
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Funder: U.S. Department of Energy
OpenAlex ID: W4416936877