Isospin symmetry breaking of K and K* mesons

Details Isospin symmetry breaking of K and K* mesons Isospin symmetry breaking of K and K* mesons

2006-06-20

arxiv.org/abs/hep-ph/0606208v2

Phys.Rev.D74:033007,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 7 figures, one reference added

Scientific paper

10.1103/PhysRevD.74.033007

We use the method of QCD sum rules to investigate the isospin symmetry breaking of K and K* mesons. The electromagnetic effect, difference between up and down current-quark masses and difference between up and down quark condensates are important. We perform sum rule analyses of their masses and decay constant differences, which are consistent with experimental values. Our results yield Delta f_K = f_{K^0} - f_{K^\pm} = 1.5 MeV.

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