The omega-rho meson mass splitting and mixing from lattice QCD

Details The omega-rho meson mass splitting and mixing from lattice QCD The omega-rho meson mass splitting and mixing from lattice QCD

2009-02-23

arxiv.org/abs/0902.3897v1

Physics

High Energy Physics

High Energy Physics - Lattice

12 pages 4 figures

Scientific paper

We compare flavour singlet and non-singlet vector mesons from first principles using lattice QCD. With N_f=2 flavours of light quark, this addresses the omega-rho mass difference. Using maximally twisted-mass lattice QCD, we are able for the first time to determine this mass difference precisely and we compare with experiment. We also discuss omega-rho mixing effects arising within QCD through the u-d quark mass difference.

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