Measurement of e e-> phi -> K K- cross section with the CMD-2 detector at VEPP-2M Collider - High Energy Physics - ExperimentReportar como inadecuado




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Abstract: The process e+ e-> phi -> K+ K- has been studied with the CMD-2 detectorusing about 542 000 events detected in the center-of-mass energy range from1.01 to 1.034 GeV. The systematic error of the cross section is estimated to be2.2%. The phi1020 meson parameters in the phi -> K+K- decay channel have beenmeasured: sigma 0phi-> K+K- = 2016 +- 8 +- 44 nb, mphi = 1019.441 +- 0.008+- 0.080 MeV-c2, Gammaphi = 4.24 +- 0.02 +- 0.03 MeV, Be+e-BK+K- = 14.27+- 0.05 +- 0.31*10-5.



Autor: CMD-2 Collaboration: R.R.Akhmetshin 1, V.M.Aulchenko 1 and 2, V.Sh.Banzarov 1, L.M.Barkov 1, S.E.Baru 1, N.S.Bashtovoy 1, A.E.Bon

Fuente: https://arxiv.org/







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