DPG Phi
Verhandlungen
Verhandlungen
DPG

Leipzig 2002 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

T: Teilchenphysik

T 106: Test des Standardmodells

T 106.2: Talk

Monday, March 18, 2002, 14:25–14:40, HS 8

Status and first physics results of the KLOE experiment — •Barbara Valeriani — IEKP-Universit"t Karlsruhe Postfach 3640 76021 Karlsruhe

The KLOE experiment at DAΦNE - the e + e collider in Frascati working at the φ(1020 MeV) resonance - has started data taking in 1999. The φ factory DAΦNE and the excellent performances of the detector KLOE allow to cover a wide physics program. First results on kaon decays and on radiative decays of the φ meson are presented.
The measurement of the cross section e + e → π + π has become one of the highlights of the KLOE program after the recent precise measurement of the muon anomalous magnetic moment performed at BNL. A precise theoretical evaluation of aµ is necessary to isolate possible new physics contributions. KLOE can contribute to reduce the uncertainty of the theoretical determination of aµ, dominated by the hadronic contribution to the vacuum polarisation by measuring the cross section σ (e + e → π + π ) in the energy range from the two pion threshold up to the φ mass. This measurement is performed at the fixed energy of DAΦNE of 1020 MeV by studying the π + π γ final state: photons emitted by electrons or positrons in the initial state lower the center of mass energy of the hadronic system.
The measurement is also relevant for a precise theoretical determination of the running electromagnetic coupling constant.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2002 > Leipzig