Measuring gravitational effects on antimatter in space

2016/05/05 by Piacentino, Giovanni Maria, Palladino, Anthony, Venanzoni, Graziano
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.1605.01751

Abstract

We propose an experimental test of the gravitational interaction with antimatter by measuring the branching fraction of the CP~violating decay K_L → π⁺ π^- in space. We show that at the altitude of the International Space Station, gravitational effects may change the level of CP~violation such that a 5σ discrimination may be obtained by collecting the K_L produced by the cosmic proton flux within a few years.

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