Scrutable

https://www.theguardian.com/science/202 ... to-gravity

Nobody is really that surprised.

shpalman wrote: Thu Sep 28, 2023 3:13 pm https://www.theguardian.com/science/202 ... to-gravity

Nobody is really that surprised.

Hadn’t realised anyone thought antimatter had antimass

Grumble wrote: Thu Sep 28, 2023 3:30 pm

shpalman wrote: Thu Sep 28, 2023 3:13 pm https://www.theguardian.com/science/202 ... to-gravity

Nobody is really that surprised.

Hadn’t realised anyone thought antimatter had antimass

Worth checking though that gravity affected antimatter mass in the same way as matter mass.
More importantly (I reckon) is that if you can do basic bulk physics on reasonable quantities (for a certain definition of reasonable), then you can check whether there are any differences compared to ordinary matter.

While some people thought that antimatter might have to fall upwards for time-reversal symmetry, others pointed out that if you threw a ball in the air and caught it, it would look the same forwards or backwards in time.

My favourite nonsense idea was that matter attracts matter and antimatter repels antimatter, while matter would be attracted to matter but antimatter would be repelled so the matter would chase the antimatter. Or maybe the other way around.

http://backreaction.blogspot.com/2021/1 ... nergy.html

shpalman wrote: Thu Sep 28, 2023 4:01 pm My favourite nonsense idea was that matter attracts matter and antimatter repels antimatter, while matter would be attracted to matter but antimatter would be repelled so the matter would chase the antimatter. Or maybe the other way around.

So now the search is on for the Benny Hill particle.

Martin Y wrote: Thu Sep 28, 2023 4:25 pm So now the search is on for the Benny Hill particle.

Yackety yack-tion at a distance