Search for light vector boson production in e+e-→μ+μ-γ interactions with the KLOE experiment
- Babusci D.
- Balwierz-Pytko I.
- Bencivenni G.
- Bloise C.
- Bossi F.
- Branchini P.
- Budano A.
- Caldeira Balkestahl L.
- Ceradini F.
- Ciambrone P.
- Curciarello F.
- Czerwinski E.
- Dane E.
- De Leo V.
- De Lucia E.
- De Robertis G.
- De Santis A.
- De Simone P.
- Di Cicco A.
- Di Domenico A.
- Di Salvo R.
- Domenici D.
- Erriquez O.
- Fanizzi G.
- Fantini A.
- Felici G.
- Fiore S.
- Franzini P.
- Gajos A.
- Gauzzi P.
- Giardina G.
- Giovannella S.
- Graziani E.
- Happacher F.
- Heijkenskjold L.
- Hoistad B.
- Johansson T.
- Kacprzak K.
- Kaminska D.
- Krzemien W.
- Kupsc A.
- Lee-Franzini J.
- Loddo F.
- Loffredo S.
- Mandaglio G.
- Martemianov M.
- Martini M.
- Mascolo M.
- Messi R.
- Miscetti S.
- Morello G.
- Moricciani D.
- Moskal P.
- Nguyen F.
- Palladino A.
- Passeri A.
- Patera V.
- Prado Longhi I.
- Ranieri A.
- Santangelo P.
- Sarra I.
- Schioppa M.
- Sciascia B.
- Silarski M.
- Tortora L.
- Venanzoni G.
- Wislicki W.
- Wolke M.
- Zdebik J.
DOIAbstract
We have searched for a light vector boson U, the possible carrier of a "dark force", with the KLOE detector at the DA Phi NE e(+)e(-) collider, motivated by astrophysical evidence for the presence of dark matter in the Universe. Using 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(-) -> mu(+)mu(-)gamma, corresponding to the decay U -> mu(+)mu(-). 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 x 10(-5) to 8.6 x 10(-7) for the mass region 520 < m(U) < 980 MeV. (C) 2014 The Authors. Published by Elsevier B. V
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