EP Seminar

KLOE MEASUREMENT OF THE σ (e+e- -->π+π-(gamma) WITH INITIAL STATE RADIATION AND THE π π CONTRIBUTION TO THE MUON ANOMALY

by Graziano Venanzoni (INFN)

Europe/Zurich
503/1-001 - Council Chamber (CERN)

503/1-001 - Council Chamber

CERN

162
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Description
The KLOE experiment at the φ factory DAΦNE in Frascati (near Rome) is the first to have employed Initial State Radiation (ISR) to precisely determine the e+e--->π+π- (γ) cross section below 1 GeV.
Two different configurations have been investigated:
(a) a non-observed photon, emitted at small angle (SA), whose energy is obtained by kinematics;
(b) a photon emitted at large angle and detected in the calorimeter (LA) where its energy is measured.
With the two samples the M2ππ range 0.1 < M2ππ < 0.95 GeV2 is covered. KLOE has recently published a measurement of the p+p- cross section at SA, and presented a new independent measurement at LA using data taken in 2006 at a collision energy of 1 GeV, 20 MeV below the φ-peak.
We present past results and discuss future prospects of these measurements as well as their impact on the evaluation of the hadronic contribution to the muon anomaly.
Joint EP/PP CERN seminar
Poster
Slides
Organized by

Maria Spiropulu/PH-EP-------------------------- **Tea and Coffee will be served at 10:30