Hybrid Exotic Meson Decay Width

Details Hybrid Exotic Meson Decay Width Hybrid Exotic Meson Decay Width

2005-09-12

arxiv.org/abs/hep-lat/0509028v1

PoS LAT2005 (2005) 062

Physics

High Energy Physics

High Energy Physics - Lattice

8 pages, 5 figures, APS revtex4 documentclass, contribution to Lattice 2005

Scientific paper

We present results of a decay width calculation for a hybrid exotic meson(h, JPC=1-+) in the decay channel h to pi+a1. This calculation uses quenched lattice QCD and Luescher's finite box method. Operators for the h and pi+a1 states are used in a correlation matrix which was expanded by varying the smearing and fuzzing levels at source and sink points. Scattering phase shifts for a discrete set of relative pi+a1 momenta are determined using eigenvalues of the correlation matrix and formulae derived by Luescher. The phase shift data is very sparse, but fits to a Breit-Wigner model are made, resulting in a decay width of about 80 MeV.

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