Measurement of the Transition Form Factor in $\varphi \to {\pi }^0{e}^{+}{e}^{-}$ with the KLOE detector

Abstract

By studying the invariant-mass distribution of the $e^{+}{e}^{-}$ in conversion decays, it is possible to learn more about mesons structure and underlying quark dynamics. At KLOE, the study of the $\varphi \to {\pi }^0{e}^{+}{e}^{-}$ process is currently going to be finalized. At present, about 9000 events have been selected from a data sample of 1.7 fb${}^{-1}$ from 2004/2005 data taking campaign. A very good agreement between data and Monte Carlo distributions has been achieved for all interesting kinematical variables. A preliminary invariant-mass spectrum of $e^{+}{e}^{-}$ is presented.

6 pages, 2 figures

References in corpus (5)

• Test of CPT and Lorentz symmetry in entangled neutral kaons with the KLOE experiment
• Measurement of the charged kaon lifetime with the KLOE detector
• Study of the $K_S{K}_L\to \pi \ell \nu 3{\pi }^0$ process for time reversal symmetry test at KLOE-2
• $K_S$ semileptonic decays and test of $\mathcal{C}\mathcal{P}\mathcal{T}$ symmetry with the KLOE detector
• Improved $K_S$ tagging procedure and its impact on physics at KLOE-2