Assuming that the whole universe doesn't collapse upon itself, would matter eventually lose cohesion at an atomic level and cease to exist?

Md Ariful Islam

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Md Ariful Islam

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Some theories of unification requires that protons decay. The decay mechanism is:
$p^+ rarrpi^0+e^-$
$pi^0 rarr 2 gamma$
Proton decay has not yet been observed and the lower limit for its half life is $10^32$ years.

Neutrons, which are heavier than protons, have a half life in their free state of about 10 minutes. Neutrons decay into a proton and an electron. Bound neutrons have a half life in the order of that of protons.

So, if protons decay then ultimately all matter will decay.

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