Constituent model of light hybrid meson decays

Farina, Christian; Swanson, Eric S.

doi:10.1103/PhysRevD.109.094015

Constituent model of light hybrid meson decays

Journal Article · Thu May 09 00:00:00 EDT 2024 · Physical Review. D.

DOI:https://doi.org/10.1103/PhysRevD.109.094015· OSTI ID:2349167

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A model of light hybrid mesons and their strong decays is developed. The model employs a gluonic quasiparticle to describe low energy gluodynamics and uses the QCD Hamiltonian in Coulomb gauge to guide the construction of states and decay amplitudes. We compute the partial widths of the twelve low lying isovector and vector hybrids. Implications of these results on hybrid searches are also made, with the chief conclusions being that direct observation of the vector states will be difficult, that a hybrid $π (1800)$ has distinctive decay characteristics, a narrow $η (1900)$ hybrid should exist, an $η_{1} (1750)$ should be sought, and that the exotic nature of $J^{P C} = 2^{- +}$ hybrid mesons should be discernible with sufficient data. We argue that the isovector $π_{2}$ hybrid has been discovered, giving a total of four possible hybrid mesons, $π_{1} (1600)$ , $η_{1} (1855)$ , $π (1800)$ , and $π_{2} (2360)$ , which appear to be filling out the low lying hybrid supermultiplet in the expected fashion.

Published by the American Physical Society 2024

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Research Organization:: Indiana Univ., Bloomington, IN (United States); Univ. of Pittsburgh, PA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: SC0019232; SC0023598

OSTI ID:: 2349167

Alternate ID(s):: OSTI ID: 2579429

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 9 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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