A moiré deflectometer for antimatter

Amsler, Claude; Ariga, Akitaka; Ariga, Tomoko; Ereditato, Antonio; Kawada, Jiro; Kimura, Mitsuhiro; Pistillo, Ciro; Scampoli, Paola; Storey, James William (2014). A moiré deflectometer for antimatter. Nature communications, 5(1) Nature Publishing Group 10.1038/ncomms5538

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The precise measurement of forces is one way to obtain deep insight into the fundamental interactions present in nature. In the context of neutral antimatter, the gravitational interaction is of high interest, potentially revealing new forces that violate the weak equivalence principle. Here we report on a successful extension of a tool from atom optics—the moiré deflectometer—for a measurement of the acceleration of slow antiprotons. The setup consists of two identical transmission gratings and a spatially resolving emulsion detector for antiproton annihilations. Absolute referencing of the observed antimatter pattern with a photon pattern experiencing no deflection allows the direct inference of forces present. The concept is also straightforwardly applicable to antihydrogen measurements as pursued by the AEgIS collaboration. The combination of these very different techniques from high energy and atomic physics opens a very promising route to the direct detection of the gravitational acceleration of neutral antimatter.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Amsler, Claude; Ariga, Akitaka; Ariga, Tomoko; Ereditato, Antonio; Kawada, Jiro; Kimura, Mitsuhiro; Pistillo, Ciro; Scampoli, Paola and Storey, James William

Subjects:

500 Science > 530 Physics

ISSN:

2041-1723

Publisher:

Nature Publishing Group

Language:

English

Submitter:

Jan Dirk Brinksma

Date Deposited:

10 Jun 2015 11:20

Last Modified:

27 May 2018 01:53

Publisher DOI:

10.1038/ncomms5538

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt.

BORIS DOI:

10.7892/boris.68653

URI:

https://boris.unibe.ch/id/eprint/68653

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