uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Limit on the production of a low-mass vector boson in e(+)e(-) -> U gamma, U -> e(+)e(-) with the KLOE experiment
Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.;Univ Messina, Dipartimento Fis & Sci Terra, Messina, Italy..
Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
Natl Ctr Nucl Res, Warsaw, Poland..
Show others and affiliations
2015 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 750, 633-637 p.Article in journal (Refereed) PublishedText
Abstract [en]

The existence of a new force beyond the Standard Model is compelling because it could explain several striking astrophysical observations which fail standard interpretations. We searched for the light vector mediator of this dark force, the U boson, with the KLOE detector at the DA Phi NE e(+)e(-) collider. Using an integrated luminosity of 1.54 fb(-1), we studied the process e(+)e(-) -> U gamma, with U -> e(+)e(-), using radiative return to search for a resonant peak in the dielectron invariant-mass distribution. We did not find evidence for a signal, and set a 90% CL upper limit on the mixing strength between the Standard Model photon and the dark photon, epsilon(2), at 10(-6)-10(-4) in the 5-520 MeV/c(2) mass range.

Place, publisher, year, edition, pages
2015. Vol. 750, 633-637 p.
Keyword [en]
Dark matter, Dark forces, Dark photon, U boson, A '
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:uu:diva-270452DOI: 10.1016/j.physletb.2015.10.003ISI: 000364250600095OAI: oai:DiVA.org:uu-270452DiVA: diva2:895720
Available from: 2016-01-19 Created: 2015-12-28 Last updated: 2016-01-19Bibliographically approved

Open Access in DiVA

fulltext(686 kB)116 downloads
File information
File name FULLTEXT01.pdfFile size 686 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Balkeståhl, Li CaldeiraCao, BoHeijkenskjold, LenaAndersson, Walter IkegamiJohansson, TordKupsc, AndrezejPapenbrock, MichaelWolke, Magnus
By organisation
Nuclear Physics
In the same journal
Physics Letters B
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar
Total: 116 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 329 hits
ReferencesLink to record
Permanent link

Direct link