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I heard that the glueball can be a candidate for dark matter. Glueball is electric neutrality, which is fine, but is it stable? Is its lifetime longer than the universe? If it is true, what is the reason for it?

Or do I misunderstand something? The glueball for dark matter is not the glueball in QCD?

Qmechanic
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Harry
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1 Answers1

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Or do I misunderstand something? The glueball for dark matter is not the glueball in QCD?

You do misunderstand something: those glueballs tossed around in cosmology are not QCD glueballs, as conventional QCD glueballs are unstable to decay to light real-world mesons (pions, etc...).

Instead, the dark matter glueballs are those of totally speculative "QCD-like" gauge theories, largely invented for that very purpose, immune to coupling to our world. Out of whole cloth.

Cosmas Zachos
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