Kaonic lead feasibility measurement at DA{\Phi}NE to solve the charged kaon mass discrepancy

TL;DR

This study demonstrates the feasibility of measuring kaonic lead X-rays at DAΦNE, showing stable detector resolution and effective background reduction, paving the way for more precise charged kaon mass measurements.

Contribution

The paper presents a novel feasibility measurement setup for kaonic lead X-ray detection at DAΦNE, establishing baseline performance for future precise kaon mass experiments.

Findings

Detector resolution remains stable during beam conditions.

Background reduction is effectively achieved.

Feasibility of future precise measurements is confirmed.

Abstract

An HPGe detector equipped with a transistor reset preamplifier and readout with a CAEN DT5781 fast pulse digitizer was employed in the measurement of X-rays from kaonic lead at the DA$\Phi$NE $e^+e^-$ collider at the Laboratori Nazionali di Frascati of INFN. A thin scintillator in front of a lead target was used to select kaons impinging on it and to form the trigger for the HPGe detector. We present the results of the kaonic lead feasibility measurement, where we show that the resolution of the HPGe detector in regular beam conditions remains the same as that without the beam and that a satisfactory background reduction can be achieved. This measurement serves as a test bed for future dedicated kaonic X-rays measurements for the more precise determination of the charged kaon mass.