Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1851056 | Physics Letters B | 2014 | 6 Pages |
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
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
D. Babusci, I. Balwierz-Pytko, G. Bencivenni, C. Bloise, F. Bossi, P. Branchini, A. Budano, L. Caldeira Balkeståhl, F. Ceradini, P. Ciambrone, F. Curciarello, E. Czerwiński, E. Danè, V. De Leo, E. De Lucia, G. De Robertis, A. De Santis, P. De Simone,