Papers › Studying Antimatter Gravity with Muonium
Studying Antimatter Gravity with Muonium
MAGE Collaboration, Aldo Antognini, Daniel M. Kaplan, Klaus Kirch, Andreas Knecht, Derrick C. Mancini, James D. Phillips, Thomas J. Phillips, Robert D. Reasenberg, Thomas J. Roberts, Anna Soter
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The gravitational acceleration of antimatter, gbar, has yet to be directly measured; an unexpected outcome of its measurement could change our understanding of gravity, the universe, and the possibility of a fifth force. Three avenues are apparent for such a measurement: antihydrogen, positronium, and muonium, the last requiring a precision atom interferometer and novel muonium beam under development. The interferometer and its few-picometer alignment and calibration systems appear feasible. With 100 nm grating pitch, measurements of gbar to 10%, 1%, or better can be envisioned. These could constitute the first gravitational measurements of leptonic matter, of 2nd-generation matter, and possibly, of antimatter.
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