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Search for light vector boson production in e(+)e(-) -> mu(+)mu(-)gamma interactions with the KLOE experiment
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2014 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 736, 459-464 p.Article in journal (Refereed) Published
Abstract [en]

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.  

Place, publisher, year, edition, pages
2014. Vol. 736, 459-464 p.
Keyword [en]
Dark matter, Dark forces, U boson
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-235175DOI: 10.1016/j.physletb.2014.08.005ISI: 000341487800068OAI: oai:DiVA.org:uu-235175DiVA: diva2:759692
Available from: 2014-10-30 Created: 2014-10-29 Last updated: 2014-10-30Bibliographically approved

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Balkeståhl, L. CaldeiraHeijkenskjöld, LenaJohansson, TordKupsc, AndrzejWolke, Magnus
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