Speaker
Dr
Francesca Curciarello
(Dipartimento di Fisica-Università di Messina)
Description
Following recent puzzling astrophysical results and recent theoretical studies, a search for a
relatively low mass ( 1 GeV) new vector boson (the U), weakly coupled with SM particles and
decaying into leptons pairs, by using the Initial State Radiation (ISR) process, was performed at KLOE.
The KLOE experiment at the $\phi$ − factory DA$\Phi$NE is the first to have
exploited ISR to precisely determine cross section process like $e^+e^- \to \pi^+\pi^-(\gamma)$
and $e^+e^- \to \mu^+\mu^-(\gamma)$ cross section below 1 GeV.
We use 220 pb$^-1$ of data to search for light vector boson in the $e^+e^- \to \mu^+\mu^-(\gamma)$ channel.
No evidence was found and a prelimiary upper limit in the mass range 600 - 1000 MeV was extracted.
Primary author
Dr
Francesca Curciarello
(Dipartimento di Fisica-Università di Messina)
