Precision analysis of KLOE data to refine the muon g−2 hadronic contribution

For the past few decades the persistent gap between theory and experiment for the muon's anomalous magnetic moment has been one of the most intriguing hints of new physics. The most precise experimental measurement—conducted at Fermilab and earlier at Brookhaven—showed a 5-sigma deviation from the Standard Model prediction by the 2020 Theory Initiative white paper. Such a discrepancy suggests either new physics (e.g., supersymmetry, dark matter particles) or missing pieces in the Standard Model's treatment of known physics. The current landscape of the g-2 puzzle is even more interesting in light of new theoretical predictions from lattice QCD and the CMD-3 collaboration.

We invite applications for a PhD project to join an exciting new analysis of data from the KLOE experiment. This research project will focus on refining the hadronic vacuum polarisation (HVP) contribution to the anomalous magnetic moment of the muon (g−2), a cornerstone in the search for physics beyond the Standard Model.

The KLOE (K LOng Experiment) detector, located at the DAΦNE electron-positron collider in Italy, was primarily designed to study kaon properties. However, it has also contributed significantly to the g−2 puzzle, particularly in understanding the hadronic vacuum polarisation (HVP), a key component of the theoretical prediction for the muon's anomalous magnetic moment.

Accurate determination of the HVP contribution is critical to resolving this puzzle. This new analysis uses a previously unexamined dataset with substantially larger statistics than previous cross-section measurements. These results will directly impact theoretical predictions for the muon g−2, addressing uncertainties in the Standard Model calculation.

 

 

 

 

 

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