Issue |
EPJ Web of Conferences
Volume 72, 2014
International Symposium Lepton and Hadron Physics at Meson-Factories
|
|
---|---|---|
Article Number | 00023 | |
Number of page(s) | 10 | |
DOI | https://doi.org/10.1051/epjconf/20147200023 | |
Published online | 06 May 2014 |
https://doi.org/10.1051/epjconf/20147200023
Meson transition form factors at KLOE/KLOE-2
Laboratori Nazionali di Frascati - INFN -
a e-mail: ivano.sarra@lnf.infn.it
Published online: 6 May 2014
In this work we present a study of the Dalitz decay ϕ → ηe+e−, with η → π0π0π0, performed using 1.7 fb−1 of e+e− collisions collected at KLOE in the 2004-2005 data taking period. The resulting branching fraction is: BR(ϕ → ηe+e−) = (1.059 ± 0.007(stat.) ± 0.038(norm.)) ± 10−4. We have also studied the invariant mass of the dilepton system, extracting the slope of the transition form factor: bϕη = (1.17 ± 0.10) GeV−2. The ϕ → π0e+e− rare decay is also being studied using the same data sample. The branching ratio will be measured, with a consistent reduction of the actual total uncertainty. The double off shell π0 Transition Form Factor will also be measured for the first time in the time-like region, with the momentum transfer given by the e+e− invariant mass.
© Owned by the authors, published by EDP Sciences, 2014
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.