Measurement of the ϕ→π0e+e− transition form factor with the KLOE detector
Number of Authors: 65
2016 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 757, 362-367 p.Article in journal (Refereed) Published
A measurement of the vector to pseudoscalar conversion decay ϕ→π0e+e− with the KLOE experiment is presented. A sample of ∼9500 signal events was selected from a data set of 1.7 fb−1 of e+e− collisions at s√∼mϕ collected at the DAΦNE e+e− collider. These events were used to obtain the first measurement of the transition form factor |Fϕπ0(q2)| and a new measurement of the branching ratio of the decay: BR(ϕ→π0e+e−)=(1.35±0.05+0.05−0.10)×10−5. The result improves significantly on previous measurements and is in agreement with theoretical predictions.
Place, publisher, year, edition, pages
2016. Vol. 757, 362-367 p.
e(+)e(-) collisions; Conversion decay; Transition form factor
IdentifiersURN: urn:nbn:se:uu:diva-289057DOI: 10.1016/j.physletb.2016.04.015ISI: 000376800300049OAI: oai:DiVA.org:uu-289057DiVA: diva2:924680
FunderEU, European Research Council, RII3-CT-2004-506078EU, FP7, Seventh Framework Programme, FP7-INFRASTRUCTURES-2008-1 227431