Mesonic width effects on the momentum dependence of the ϱ-ω mixing matrix element

It is shown, in a model independent way, that the large difference in ϱ and ω widths gives rise to a new source of momentum dependence for the ϱ-ω mixing matrix element. The q 2 dependence arising due to the meson widths leads to a significant alteration of the result obtained in the zero-width appr...

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Bibliographic Details
Published in:Physics letters. B 1996-01, Vol.367 (1), p.45-49
Main Authors: Iqbal, M.J, Jin, Xuemin, Leinweber, Derek B
Format: Article
Language:English
Subjects:
Dispersion relation
Finite mesonic widths
Mixed propagator
Momentum dependence
Rho-omega mixing
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Summary:It is shown, in a model independent way, that the large difference in ϱ and ω widths gives rise to a new source of momentum dependence for the ϱ-ω mixing matrix element. The q 2 dependence arising due to the meson widths leads to a significant alteration of the result obtained in the zero-width approximation usually discussed in the literature. The origin of this strong momentum dependence lies in the difference between the ϱ and ω meson widths.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(95)01447-0