Antimatter has positive inertial mass and negative gravitational mass
Is it true that antimatter has positive inertial mass and negative gravitational mass?
No. Recent direct and indirect experimental evidence, including findings from the ALPHA-g collaboration, demonstrates that antihydrogen experiences gravitational attraction to the Earth rather than repulsion, refuting the hypothesis that antimatter possesses negative gravitational mass.
Verdict: REFUTED · 0 sources for, 3 against · Last checked
The claim states that antimatter has positive inertial mass and negative gravitational mass (antigravity). Multiple retrieved papers directly test this hypothesis using antihydrogen and relativistic particles. The ALPHA-g study (one study) and bounds from LEP/Tevatron (one study) directly refute the existence of negative gravitational mass for antimatter, showing it is attracted to Earth. Therefore, the evidence clearly opposes the claim.
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Capra, C. M. D. M. W. E. A. C. L. M. S. J. T. M. C. D. R. A. A. A. B. B. B., Amole, C., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Butler, E., Capra, A., Cesar, C. L., Charlton, M., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayden, M., Isaac, C., Jonsell, S., Kurchaninov, L., Little, A., Madsen, N., McKenna, J., Menary, S., Napoli, S. C., Nolan, P., Olin, A., Pusa, P., Rasmussen, C., Robicheaux, F., Sarid, E., Silveira, D. M., So, C., Thompson, R., Werf, D. P. v. d., Wurtele, J., Zhmoginov, A., & Charman, A. (2013). Description and first application of a new technique to measure the gravitational mass of antihydrogen. doi.org. https://doi.org/10.1038/ncomms2787
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EK, A., CJ, B., W, B., NM, B., G, B., A, C., I, C., CL, C., M, C., A, C., R, C., A, C. M., D, D. Q., S, E., A, E., N, E., S, F., J, F., A, F., T, F., MC, F., DR, G., LM, G., MB, G. G., P, G., P, G., JS, H., ME, H., D, H., ED, H., CA, I., AJU, J., MA, J., JM, J., SA, J., S, J., A, K., N, M., L, M., N, M., D, M., JTK, M., S, M., T, M., M, M., PS, M., J, N., K, O., AN, O., J, P., A, P., CØ, R., F, R., RL, S., M, S., E, S., J, S., DM, S., J, S., G, S., C, S., S, S., G, S., TD, T., KA, T., RI, T., E, T., C, T., M, U., P, W., & JS, W. (2023). Observation of the effect of gravity on the motion of antimatter.. doi.org. https://doi.org/10.1038/s41586-023-06527-1
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Kalaydzhyan, T. (2015). Gravitational mass of relativistic matter and antimatter. doi.org. https://doi.org/10.1016/j.physletb.2015.10.014
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