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

Direct link
Measurement of eta meson decays into lepton-antilepton pairs
Show others and affiliations
2008 (English)In: Physical Review D. Particles and fields, ISSN 0556-2821, E-ISSN 1089-4918, Physical Review D, ISSN 1550-7998, Vol. 77, no 3, 032004- p.Article in journal (Refereed) Published
Abstract [en]

A search for rare lepton decays of the eta meson was performed using the WASA detector at CELSIUS. Two candidates for double Dalitz decay eta -> e(+)e(-)e(+)e(-) events are reported with a background of 1.3 +/- 0.2 events. This allows to set an upper limit to the branching ratio of 9.7x10(-5) (90% CL). The branching ratio for the decay eta -> e(+)e(-)gamma is determined to (7.8 +/- 0.5(stat)+/- 0.8(syst))x10(-3) in agreement with world average value. An upper limit (90% CL) for the branching ratio for the eta -> e(+)e(-) decay is 2.7x10(-5) and a limit for the sum of the eta ->mu(+)mu(-)mu(+)mu(-) and eta ->pi(+)pi(-)mu(+)mu(-) decays is 3.6x10(-4).

Place, publisher, year, edition, pages
2008. Vol. 77, no 3, 032004- p.
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-110483DOI: 10.1103/PhysRevD.77.032004ISI: 000253764700005OAI: oai:DiVA.org:uu-110483DiVA: diva2:277101
Available from: 2009-11-16 Created: 2009-11-16 Last updated: 2016-05-10

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Geren, L.Kupsc, Andrzej
By organisation
The Svedberg LaboratoryDepartment of Physics and Astronomy
In the same journal
Physical Review D. Particles and fields
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 183 hits
ReferencesLink to record
Permanent link

Direct link