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Studying Antimatter Gravity with Muonium

Paul Scherrer Institute, 5232 Villigen, Switzerland
ETH Zürich, 8092 Zürich, Switzerland
Illinois Institute of Technology, Chicago, IL 60616, USA
Center for Astrophysics and Space Sciences, University of California at San Diego, La Jolla, CA 92093, USA
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA
Author to whom correspondence should be addressed.
Atoms 2018, 6(2), 17;
Received: 13 February 2018 / Revised: 23 March 2018 / Accepted: 26 March 2018 / Published: 9 April 2018
(This article belongs to the Special Issue Measuring Gravity in the Lab)
The gravitational acceleration of antimatter, g ¯ , 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 g ¯ 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. View Full-Text
Keywords: gravity; antimatter; muonium; atom interferometer; tracking frequency gauge gravity; antimatter; muonium; atom interferometer; tracking frequency gauge
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MDPI and ACS Style

Antognini, A.; Kaplan, D.M.; Kirch, K.; Knecht, A.; Mancini, D.C.; Phillips, J.D.; Phillips, T.J.; Reasenberg, R.D.; Roberts, T.J.; Soter, A. Studying Antimatter Gravity with Muonium. Atoms 2018, 6, 17.

AMA Style

Antognini A, Kaplan DM, Kirch K, Knecht A, Mancini DC, Phillips JD, Phillips TJ, Reasenberg RD, Roberts TJ, Soter A. Studying Antimatter Gravity with Muonium. Atoms. 2018; 6(2):17.

Chicago/Turabian Style

Antognini, Aldo, Daniel M. Kaplan, Klaus Kirch, Andreas Knecht, Derrick C. Mancini, James D. Phillips, Thomas J. Phillips, Robert D. Reasenberg, Thomas J. Roberts, and Anna Soter. 2018. "Studying Antimatter Gravity with Muonium" Atoms 6, no. 2: 17.

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