Decay width of light quark hybrid meson from the lattice

Details Decay width of light quark hybrid meson from the lattice Decay width of light quark hybrid meson from the lattice

2006-03-06

arxiv.org/abs/hep-lat/0603007v3

Phys.Rev.D73:074506,2006

Physics

High Energy Physics

High Energy Physics - Lattice

16 pages, 4 ps figures, version accepted for publication in Phys Rev D

Scientific paper

10.1103/PhysRevD.73.074506

Lattice QCD with $N_f=2$ flavours of sea quark is used to explore the spectrum and decay of a $J^{PC}=1^{-+}$ spin-exotic hybrid meson. We test lattice determination of S-wave decay amplitudes at threshold using $b_1 \to \pi \omega$ where agreement with data is found. We find a hybrid meson state at 2.2(2) GeV with a partial width to $\pi b_1$ of 400(120) MeV and to $\pi f_1$ of 90(60) MeV.

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