Re:New exotic matter particle, a tetraquark, discovered at CERN
by dukwon on Saturday July 31, 2021 @05:57AM
(#28016782)
No. The presence of a valence antiquark guarantees it will decay at some point.
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Re:New exotic matter particle, a tetraquark, discovered at CERN
by evanb on Sunday August 01, 2021 @04:20AM
(#28024720)
That’s not the full explanation; the antiproton is stable (or, is as stable as the proton).
It’s that the net baryon number is 0 and that the flavor ‘quantum numbers’ aren’t conserved by the weak force. If you could turn off the weak force, this cc ubar dbar tetraquark would be absolutely stable.