From a sample of about 109ϕ mesons produced at DAΦNE, we have selected KL mesons tagged by observing KS→π+π− decays. We present results on the major KL branching ratios, including those of the ...semileptonic decays needed for the determination of |Vus|. These branching ratio measurements are fully inclusive with respect to final-state radiation. The KL lifetime has also been measured.
The KLOE electromagnetic calorimeter Adinolfi, M.; Ambrosino, F.; Antonelli, A. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
11/2002, Volume:
494, Issue:
1
Journal Article
Peer reviewed
The KLOE calorimeter is a fine lead-scintillating fiber sampling calorimeter. We describe in the following the calibration procedures and the calorimeter performances obtained after 3 years of data ...taking. We get an energy resolution for electromagnetic showers of
5.4%/
E
(GeV)
and a time resolution of 56 ps/
E
(GeV)
. We also present a measurement of efficiency for low-energy photons.
We have searched for the decay KS→3π0 with the KLOE experiment at DAΦNE using data from e+e− collisions at a center of mass energy W∼mϕc2 for an integrated luminosity L=450pb−1. The search has been ...performed with a pure KS beam obtained by tagging with KL interactions in the calorimeter and detecting six photons. We find an upper limit for the branching ratio of 1.2×10−7 at 90% C.L.
The KLOE experiment has been collecting data since april 1999 at the DAΦNE collider in Frascati. A statistics of about 0.45
f
b
−1
has been analyzed. The latest results concerning the study of the
ϕ ...radiative decays and of the kaon decays are illustrated in this paper.
AbstractWe have measured the cross section σ(e+e–→π+π–γ) with the KLOE detector at DAΦNE, at an energy W=Mφ=1.02 GeV. From the dependence of the cross section on ...\(m(\pi^+\pi^{-})=\sqrt{W^2-2WE_\gamma}\), where Eγ is the energy of the photon radiated from the initial state, we extract σ(e+e–→π+π–) for the mass range 0.35<m2(π+π–)<0.95 GeV2. From our result we extract the pion form factor and the hadronic contribution to the muon anomaly, aμ.
We have measured the absolute branching ratio BR(K±→π±π0π0) with the KLOE detector at the DAΦNE e+e− collider. We collected ∼3.3×107 tagged charged kaons, from the reaction e+e−→ϕ→K+K−. We find ...BR(K±→π±π0π0)=(1.763±0.013stat±0.022syst)×10−2.
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