Gravitational mass of positron from LEP synchrotron losses

Kalaydzhyan, Tigran

doi:10.1038/srep30461

Gravitational mass of positron from LEP synchrotron losses

Journal Article · Wed Jul 27 00:00:00 EDT 2016 · Scientific Reports

DOI:https://doi.org/10.1038/srep30461· OSTI ID:1326647

Kalaydzhyan, Tigran ^[1]

Univ. of Illinois, Chicago, IL (United States); Stony Brook Univ., Stony Brook, NY (United States); Department of Physics, University of Illinois, Chicago, Illinois

General relativity(GR) is the current description of gravity in modern physics. One of the cornerstones of GR, as well as Newton’s theory of gravity, is the weak equivalence principle (WEP), stating that the trajectory of a freely falling test body is independent of its internal structure and composition. WEP is known to be valid for the normal matter with a high precision. However, due to the rarity of antimatter and weakness of the gravitational forces, the WEP has never been confirmed for antimatter. The current direct bounds on the ratio between the gravitational and inertial masses of the antihydrogen do not rule out a repulsive nature for the antimatter gravity. Here we establish an indirect bound of 0.13% on the difference between the gravitational and inertial masses of the positron (antielectron) from the analysis of synchrotron losses at the Large Electron-Positron collider (LEP). As a result, this serves as a confirmation of the conventional gravitational properties of antimatter without common assumptions such as, e.g., coupling of gravity to virtual particles, dynamics of distant astrophysical sources and the nature of absolute gravitational potentials.

View Accepted Manuscript (DOE)

Research Organization:: State Univ. of New York, Albany, NY (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-88ER40388

OSTI ID:: 1326647

Journal Information:: Scientific Reports, Journal Name: Scientific Reports Vol. 6; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Tests of discrete symmetries Sozzi, M. S. Journal of Physics G: Nuclear and Particle Physics, Vol. 47, Issue 1 https://doi.org/10.1088/1361-6471/ab4822	journal	November 2019
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