Thursday, September 28, 2023

Antimatter not as exotic as it might have been

At the New York Times, a report on a physics experiment that shows antimatter is affected by gravity the same way as normal matter: 

In science fiction, antiparticles provide the power for warp drives. Some physicists have speculated that antiparticles are being repelled by gravity or even traveling backward in time.

A new experiment at CERN, the European Center for Nuclear Research, brings some of that speculation back down to Earth. In a gravitational field, it turns out, antiparticles fall just like the rest of us. “The bottom line is that there’s no free lunch, and we’re not going to be able to levitate using antimatter,” said Joel Fajans of the University of California, Berkeley.

And:

Few physicists were surprised by the result. According to Einstein’s theory of general relativity, all forms of matter and energy respond equally to gravity.

“If you walk down the halls of this department and ask the physicists, they would all say that this result is not the least bit surprising,” Jonathan Wurtele, a physicist at the University of California, Berkeley, said in an announcement issued by the university. It was he who first suggested the experiment to Dr. Fajans a decade ago. “That’s the reality,” Dr. Wurtele said.

“But most of them will also say that the experiment had to be done because you never can be sure,” he added. “The opposite result would have had big implications.”

A bit of a pity, really.  Anomalous results are more fun.

1 comment:

Anonymous said...

No surprise at all. There is no such thing as antimatter. This is a very unhelpful characterisation by these buffoons.

What happens is gamma rays in a vacuum leads to pair production. Electron and Positron pairs. All other particles that are real are made up of these two. Or we have to assume so. The positron is not anti-matter it’s more matter. It’s needed to build protons