KLOE Perspectives for R-Measurements at DAFNE2

TL;DR

The paper discusses the potential of the upgraded DAFNE2 accelerator and KLOE detector to measure hadronic cross sections between 1-2 GeV, impacting the muon g-2 anomaly, using energy scans and radiative return methods.

Contribution

It evaluates the feasibility of R-measurements at DAFNE2 and compares energy scan and radiative return techniques for hadronic cross section measurements.

Findings

Feasibility of measuring hadronic cross sections at DAFNE2.

Impact on reducing uncertainties in muon g-2 calculations.

Comparison of energy scan and radiative return methods.

Abstract

As a future upgrade of the Frascati phi factory DAPHNE an increase of the center-of-mass energy of the accelerator up to W=2GeV has been proposed (DAFNE2). In this case the hadronic cross section in the energy range between 1-2 GeV can be measured with the KLOE detector. The feasibility of these measurements and the impact on the hadronic contribution to the anomalous magnetic moment of the muon are discussed. The possibilities for an energy scan are compared with the radiative return technique, in which the accelerator is running at a fixed center-of-mass energy and ISR-events are taken to lower the invariant mass of the hadronic system.