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Have the Pauli exclusion principle been proven to apply to antimatter experimentally?

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    $\begingroup$ see this "putting the Pauli exclusion pincipeple to test" cerncourier.com/a/…. If you read the last paragraph you will see the complication of the experimental tests that certainly cannot be performed with positrons and antiprotons at present. $\endgroup$
    – anna v
    Oct 16, 2021 at 8:10

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While CERN has created anti-hydrogen, there has never been a synthesized multi-antielectron anti-atom. So there has never been a large enough anti-atom (antinucleons with antielectrons) to experimentally test the PEP for antimatter.

But the Pauli exclusion principle applies to all spin $\frac{1}{2}$ particles (all fermions) and one would be shocked that in anti-atoms containing several anti-electrons, the PEP was not obeyed.

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    $\begingroup$ It could make for some interesting chemistry if PEP didn't apply for multi-electron AM atoms! $\endgroup$
    – Gert
    Oct 16, 2021 at 11:06

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