Speaker
Description
The KLOE detector at the DA$\Phi$NE electron–positron collider has delivered some of the most precise measurements of the two-pion contribution to the hadronic vacuum polarization (HVP) term in the Standard Model prediction of the muon anomalous magnetic moment, $a_{\mu}$. A precise determination of the HVP term is essential to clarify the longstanding tension between the theoretical prediction and experimental measurements.
A key component of the ongoing KLOE analysis (KLOE-NXT) is a stringent QED validation of the $e^+e^- \to \mu^+ \mu^- \gamma$ process, which provides an important cross-check. Reaching the required level of precision demands an improved determination of the integrated luminosity and a careful reassessment of the systematic uncertainties.
This talk will present the ongoing KLOE-NXT analysis, based on a previously unexplored dataset with significantly higher statistics than those used in earlier KLOE measurements, and will report preliminary results from the dedicated luminosity study.