Speaker
Marco Dreucci
(INFN Frascati)
Description
A phi-factory offers the possibility to select pure kaon beams:
neutral kaons from phi → KSKL are in fact produced in pairs and
the detection of a KS (KL) tags the presence of a KL (KS).
This allows to perform precise measurement of kaon properties.
We are presently finalizing new determinations of the KL and KS lifetimes
using the whole KLOE data set, consisting of more than 109 phi -> KS KL
decays. Both determinations benefit from a precise knowledge of kaon momenta.
The KL lifetime, which has been already measured by KLOE with 0.6% accuracy
using 20% of the total data sample (PLB 626, 2005, 15), will be extracted from
the proper time distribution of KL->3pi0 decays, tagged by a KS->pi+pi-
decay on the opposite hemisphere of the apparatus.
A competitive measurement of the KS lifetime is obtained from the
proper time distribution of KS->pi+pi- decays.
Primary author
Marco Dreucci
(INFN Frascati)
