Kaonic Lead Feasibility Measurement at DAΦNE to Solve the Charged Kaon Mass Discrepancy

An HPGe detector equipped with a transistor reset preamplifier and readoutwith a CAEN DT5781 fast pulse digitizer was employed in the measurement ofX-rays from kaonic lead at the DAΦNE e^+e^- collider at the LaboratoriNazionali di Frascati of INFN. A thin scintillator in front of a lead targetwas used to select kaons impinging on it and to form the trigger for the HPGedetector. We present the results of the kaonic lead feasibility measurement,where we show that the resolution of the HPGe detector in regular beamconditions remains the same as that without the beam and that a satisfactorybackground reduction can be achieved. This measurement serves as a test bed forfuture dedicated kaonic X-rays measurements for the more precise determinationof the charged kaon mass.