We have searched for a light vector boson U , the possible carrier of a “dark force”, with the KLOE detector at the DAΦNE e+e−e+e− collider, motivated by astrophysical evidence for the presence of dark matter in the Universe. Using e+e−e+e− collisions collected with an integrated luminosity of 239.3 pb−1, we look for a dimuon mass peak in the reaction e+e−→μ+μ−γe+e−→μ+μ−γ, corresponding to the decay U→μ+μ−U→μ+μ−. We find no evidence for a U vector boson signal. We set a 90% CL upper limit for the mixing parameter squared between the photon and the U boson of 1.6×10−51.6×10−5 to 8.6×10−78.6×10−7 for the mass region 520<mU<980 MeV520<mU<980 MeV.

Search for light vector boson production in e+e−→μ+μ−γ interactions with the KLOE experiment

CURCIARELLO, FRANCESCA;DE LEO, VERONICA;GIARDINA, Giorgio 42;MANDAGLIO, GIUSEPPE;
2014-01-01

Abstract

We have searched for a light vector boson U , the possible carrier of a “dark force”, with the KLOE detector at the DAΦNE e+e−e+e− collider, motivated by astrophysical evidence for the presence of dark matter in the Universe. Using e+e−e+e− collisions collected with an integrated luminosity of 239.3 pb−1, we look for a dimuon mass peak in the reaction e+e−→μ+μ−γe+e−→μ+μ−γ, corresponding to the decay U→μ+μ−U→μ+μ−. We find no evidence for a U vector boson signal. We set a 90% CL upper limit for the mixing parameter squared between the photon and the U boson of 1.6×10−51.6×10−5 to 8.6×10−78.6×10−7 for the mass region 520
2014
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/2786169
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