The φ-meson leptonic widths, $\Gamma_{ee}$ and $Gamma_{μμ}$, are obtained, respectively, from the e+e− forward-backward asymmetry and the μ+μ− cross section around the φ-mass energy. We find $\Gamma_{ee}=1.32±0.05±0.03$ keV and $\sqrt{\Gamma_{ee} \Gamma_{\mu\mu}=1.320±0.018±0.017$ keV. These re- sults, compatible with $\Gamma_{ee}=\Gamma_{\mu \mu}$, provide a precise test of lepton universality. Com- bining the two results gives $\Gamma_{\ell \ell} = 1.320 ± 0.023$ keV.

Ambrosino, F., Antonelli, A., Antonelli, M., Bacci, C., Barva, M., Beltrame, P., et al. (2005). Measurement of the leptonic decay widths of the φ-meson with the KLOE detector. PHYSICS LETTERS. SECTION B, 608, 199-205 [10.1016/j.physletb.2005.01.010].

Measurement of the leptonic decay widths of the φ-meson with the KLOE detector

CARBONI, GIOVANNI;MESSI, ROBERTO;SANTOVETTI, EMANUELE;
2005-01-01

Abstract

The φ-meson leptonic widths, $\Gamma_{ee}$ and $Gamma_{μμ}$, are obtained, respectively, from the e+e− forward-backward asymmetry and the μ+μ− cross section around the φ-mass energy. We find $\Gamma_{ee}=1.32±0.05±0.03$ keV and $\sqrt{\Gamma_{ee} \Gamma_{\mu\mu}=1.320±0.018±0.017$ keV. These re- sults, compatible with $\Gamma_{ee}=\Gamma_{\mu \mu}$, provide a precise test of lepton universality. Com- bining the two results gives $\Gamma_{\ell \ell} = 1.320 ± 0.023$ keV.
2005
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
leptonic width
Ambrosino, F., Antonelli, A., Antonelli, M., Bacci, C., Barva, M., Beltrame, P., et al. (2005). Measurement of the leptonic decay widths of the φ-meson with the KLOE detector. PHYSICS LETTERS. SECTION B, 608, 199-205 [10.1016/j.physletb.2005.01.010].
Ambrosino, F; Antonelli, A; Antonelli, M; Bacci, C; Barva, M; Beltrame, P; Bencivenni, G; Bertolucci, S; Carboni, G; Messi, R; Santovetti, E; Ii,...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/38424
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