The gravitational interaction of antimatter with matter or antimatter has not been conclusively observed by physicists. While the overwhelming consensus among physicists is that antimatter will attract both matter and antimatter at the same rate that matter attracts matter, there is a strong desire to confirm this experimentally, since the hypothesis is still open to falsification.
Antimatter's rarity and tendency to annihilate when brought into contact with matter makes its study a technically demanding task. Most methods for the creation of antimatter (specifically antihydrogen) result in high energy atoms unsuitable for gravity-related study. In recent years, the ATHENA and ATRAP consortia have successfully created low-energy antihydrogen, but observations have thus far been methodically limited to annihilation events that yield little-to-no gravitational data.
Other articles related to "gravitational interaction of antimatter, antimatter, gravitational, gravitational interactions, of antimatter":
... Virtually every modern physicist suspects that antimatter has positive mass and should be affected by gravity just like normal matter, although it is thought that this view has not ... It is difficult to directly observe gravitational forces at the particle level at such small scales, electric forces tend to overwhelm gravitational interactions ... It is hoped that the ATRAP antimatter experiments will be able to make direct measurements ...
... idea of antigravity, either assuming that antimatter has negative gravitational mass, and thus is self-attractive, or that it is even self-repulsive ... In a recent paper, Villata argued that there is no need to change the sign of the gravitational mass of antimatter (which would represent a violation of the weak ... for a matter test particle in a matter-generated gravitational field is composed of four elements ...
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