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Is it possible somehow that antimatter (-ve mass) could create an upside curvature on spacetime, as it bulges outward rather than inward as in case of real matter (+ve mass)?

PNS
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avadro112
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  • My answer here is relevant https://physics.stackexchange.com/q/352563/ – anna v May 30 '20 at 04:23
  • https://physics.stackexchange.com/q/538078/23615 a related question with links/answers therein. – Triatticus May 30 '20 at 04:23
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    The answer is no. – SuperCiocia May 30 '20 at 04:50
  • Why do you think that antimatter has negative mass? – G. Smith May 30 '20 at 05:07
  • @SuperCiocia if you check the link I gave, there is a link to experiments at CERN checking the hypothesis that antimtter might respond to gravity with a negative sign.https://home.cern/science/experiments/aegis – anna v May 30 '20 at 05:23
  • Related: https://physics.stackexchange.com/q/9371/2451 , https://physics.stackexchange.com/q/476141/2451 and links therein. – Qmechanic May 30 '20 at 05:42
  • @anna v Yes but they haven't confirmed it experimentally. So far the only stress-energy tensors that give positive curvature correspond to exotic distributions of matter that have hitherto not been observed in real life. Quite the contrary, these "solutions" are usually obtained by solving the Einstein equations "the other way around", i.e. assuming a given metric solution to see which stress-energy tensor would generate it. – SuperCiocia May 30 '20 at 05:52

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Antimatter particles have mass and both produce and respond to gravity the same way as their matter counterparts. The "anti" in their name refers not to their mass but to their electrical charge.

niels nielsen
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