Search for a vector gauge boson in ϕ meson decays with the KLOE detector

Authors :: Archilli, F.
Babusci, D.
Badoni, D.
Balwierz, I.
Bencivenni, G.
Bini, C.
Bloise, C.
Bocci, V.
Bossi, F.
Branchini, P.
Budano, A.
Bulychjev, S.A.
Caldeira Balkeståhl, L.
Campana, P.
Capon, G.
Ceradini, F.
Ciambrone, P.
Czerwiński, E.
Dané, E.
De Lucia, E.
Source :: Physics Letters B. Jan2012, Vol. 706 Issue 4/5, p251-255. 5p.
Publication Year :: 2012
Abstract: Abstract: The existence of a light dark force mediator has been tested with the KLOE detector at DAΦNE. This particle, called U, is searched for using the decay chain , , . No evidence is found in 1.5 fb−1 of data. The resulting exclusion plot covers the mass range , setting an upper limit on the ratio between the U boson coupling constant and the fine structure constant, , of at 90% C.L. for . [Copyright &y& Elsevier]