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- W2079343800 abstract "We present a new limit on the production of a light dark-force mediator with the KLOE detector at DAΦNE. This boson, called U, has been searched for in the decay ϕ→ηU, U→e+e−, analyzing the decay η→π0π0π0 in a data sample of 1.7 fb−1. No structures are observed in the e+e− invariant mass distribution over the background. This search is combined with a previous result obtained from the decay η→π+π−π0, increasing the sensitivity. We set an upper limit at 90% C.L. on the ratio between the U boson coupling constant and the fine structure constant of α′/α<1.7×10−5 for 30<MU<400 MeV and α′/α⩽8×10−6 for the sub-region 50<MU<210 MeV. This result assumes the Vector Meson Dominance expectations for the ϕηγ⁎ transition form factor. The dependence of this limit on the transition form factor has also been studied." @default.
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- W2079343800 date "2013-03-01" @default.
- W2079343800 modified "2023-10-17" @default.
- W2079343800 title "Limit on the production of a light vector gauge boson in ϕ meson decays with the KLOE detector" @default.
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- W2079343800 doi "https://doi.org/10.1016/j.physletb.2013.01.067" @default.
- W2079343800 hasPublicationYear "2013" @default.
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