Timelike Form Factor of the Kaon for |Q^2|=M^2(J/psi)

Details Timelike Form Factor of the Kaon for |Q^2|=M^2(J/psi) Timelike Form Factor of the Kaon for |Q^2|=M^2(J/psi)

2007-01-04

arxiv.org/abs/hep-ex/0701005v1

Phys.Rev.D75:017301,2007

Physics

High Energy Physics

High Energy Physics - Experiment

2 pages, 1 figure, published in PRD

Scientific paper

10.1103/PhysRevD.75.017301

The timelike form factor of the charged kaon is evaluated at
|Q^2|=M^2(J/psi)=9.59 GeV^2 by relating it to B(J/psi->K+K-), B(J/psi->K_SK_L)
and B(J/psi->e+e-). The resulting value, |Q^2|F_K(9.59 GeV^2)=0.81+-0.18 GeV^2
is found to be in good agreement with |Q^2|F_K(13.5 GeV^2)=0.85+-0.05 GeV^2
obtained recently by the direct measurement of the reaction e+e--> K+K-.

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