Exotic Meson Decay Widths using Lattice QCD

Details Exotic Meson Decay Widths using Lattice QCD Exotic Meson Decay Widths using Lattice QCD

2006-06-02

arxiv.org/abs/hep-lat/0606005v2

Phys.Rev. D74 (2006) 034509

Physics

High Energy Physics

High Energy Physics - Lattice

9 pages, 8 figures, RevTex4, minor change to Fig. 1

Scientific paper

10.1103/PhysRevD.74.034509

A decay width calculation for a hybrid exotic meson h, with JPC=1-+, is presented for the channel h->pi+a1. This quenched lattice QCD simulation employs Luescher's finite box method. Operators coupling to the h and pi+a1 states are used at various levels of smearing and fuzzing, and at four quark masses. Eigenvalues of the corresponding correlation matrices yield energy spectra that determine scattering phase shifts for a discrete set of relative pi+a1 momenta. Although the phase shift data is sparse, fits to a Breit-Wigner model are attempted, resulting in a decay width of about 60 MeV when averaged over two lattice sizes.

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