Research Information System
Physical Review D, vol.111, no.3, 2025 (SCI-Expanded)
The full width of the light isovector hybrid meson HV with spin-parities 1-+ and content (ūgu-d¯gd)/2 is evaluated by considering the decays HV→ρ±π, b1±π, f1(1285)π, f1(1420)π, ηπ, and η′π. To calculate the partial widths of these channels, we use the quantum chromodynamics (QCD) three-point sum rule method which is necessary to determine strong couplings at the corresponding hybrid-meson-meson vertices. It turns out that the main contribution to the full width Γ[HV]=(109.7±16.0) MeV of the hybrid meson comes from the processes HV→ρ±π partial width of which amounts to ≈67 MeV. The effects of the decays HV→b1π and HV→f1π,f1′π are also sizeable: Their partial widths are equal to 13 MeV and 20 MeV, respectively. The decays to ηπ and η′π mesons are subdominant reactions, nevertheless they form ≈9% of the full width Γ[HV]. Results obtained in this work may be interesting to unravel the tangle of predictions about HV existing in the literature, as well as useful in analyses of different resonances.