Indications of the possible observation of the lowest-lying 1^{-+} QCD state

Details Indications of the possible observation of the lowest-lying 1^{-+} QCD state Indications of the possible observation of the lowest-lying 1^{-+} QCD state

2007-03-17

arxiv.org/abs/hep-ph/0703186v4

Phys.Rev.D76:094001,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 3 figures; some typos corrected, Published version

Scientific paper

10.1103/PhysRevD.76.094001

We discuss properties of 1^{-+} exotic mesons within the framework of the QCD field-theoretic approach. We estimate the mass of the lowest-lying 1^{-+} exotic meson using renormalization-improved QCD sum rules, and find that the mass lies around $1.26\pm 0.15$ GeV, in good agreement with the $\pi_1(1400)$ data. This state should be expected in QCD. We find that the mass for the lowest-lying strange 1^{-+} meson is $1.31\pm 0.19$ GeV. Our result hints that the K^*(1410) may be the lowest-lying 1^{-+} nonet state.

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