Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1848677 | Physics Letters B | 2016 | 6 Pages |
Abstract
A measurement of the vector to pseudoscalar conversion decay ϕ→π0e+e−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−e+e− collisions at s∼mϕ collected at the DAΦNE e+e−e+e− collider. These events were used to perform the first measurement of the transition form factor |Fϕπ0(q2)||Fϕπ0(q2)| and a new measurement of the branching ratio of the decay: BR(ϕ→π0e+e−)=(1.35±0.05−0.10+0.05)×10−5. The result improves significantly on previous measurements and is in agreement with theoretical predictions.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
A. Anastasi, D. Babusci, G. Bencivenni, M. Berlowski, C. Bloise, F. Bossi, P. Branchini, A. Budano, L. Caldeira Balkeståhl, B. Cao, F. Ceradini, P. Ciambrone, F. Curciarello, E. Czerwiński, G. D'Agostini, E. Danè, V. De Leo, E. De Lucia, A. De Santis,