Fig. 4: Distribution of the z-coordinates of tracks reconstructed with the fast cryogenic detector (FACT). | Communications Physics

Fig. 4: Distribution of the z-coordinates of tracks reconstructed with the fast cryogenic detector (FACT).

From: Pulsed production of antihydrogen

Fig. 4: Distribution of the z-coordinates of tracks reconstructed with the fast cryogenic detector (FACT).The alternative text for this image may have been generated using AI.

The plot shows the distribution of the z-coordinates of charged particle tracks reconstructed from hits detected in the two layers of the FACT detector in temporal coincidence (Δt = ±5 ns) with hits of the external detector scintillator array (ESDA). For this combined analysis, we used a mean ESDA amplitude of 150 mV, lower than that used in the ESDA-only analysis. The antiproton plasma is centered at z = 0. The distributions for the two samples are rescaled to the same number of antiprotons; furthermore, each track is weighted to account for combinatorial ambiguities (several hits may fire in the same temporal coincidence window, particularly at early times).

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