Study of the $K^{-}\pi^{0}$ Final State in Primakoff Kinematics with COMPASS at CERN

Thursday 28 May 2026, 14:30 → 15:30 Europe/Berlin

E18/ENE Seminar Room 3268 (TUM PH)

In this analysis, the $K^{-}\gamma^{()}\to K^{-} \pi^{0}$ Primakoff production at the COMPASS experiment at CERN is studied using data taken in 2012 with the 190 GeV hadron beam and the Ni target. Measurements of the cross section of this process are of interest as a test of predictions of Chiral Perturbation Theory in the strangeness sector. The sought-after final state is isolated through a detailed event selection that includes particle identification using CEDAR detectors and the Kaon Trigger, $\pi^{0}$ reconstruction through the energy deposition in ECAL2 from the dominant two-photon decay, and different kinematic cuts. The resulting distribution of the selected events shows contributions corresponding to the $K^(892)$ and the $K_2(1430)$ resonances. As a result, $1954\pm55$ Primakoff events were detected. The findings of this work will be used for the future analyses at COMPASS and AMBER.