# Can a (uuu) baryon exist? If so, why wouldn't protons decay

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• Eric Putney
In summary, the conversation discusses the potential for protons to decay due to the existence of the (uuu) baryon, which is heavier than the lightest (uud) baryon due to quantum mechanics principles. The reason for this is that the total wave function of the baryon must be antisymmetric under the exchange of up-quarks, and (uuu) cannot have spin 1/2 like (uud) can, leading to a larger mass. The conversation ends with the acknowledgement that this explanation makes sense and thanks for the response.
Eric Putney
Is this some sort of issue with color or another quantity that needs to be conserved?

(uuu) is heavier than the lightest (uud) baryon. The reason comes from quantum mechanics: The total wave function has to be antisymmetric under the exchange of up-quarks. (uud) can have spin 1/2, but (uuu) cannot. A larger spin leads to a larger mass.

mfb said:
(uuu) is heavier than the lightest (uud) baryon. The reason comes from quantum mechanics: The total wave function has to be antisymmetric under the exchange of up-quarks. (uud) can have spin 1/2, but (uuu) cannot. A larger spin leads to a larger mass.
I suppose that makes sense, thanks for the reply!

Orodruin said:
https://en.wikipedia.org/wiki/Delta_baryon

Why do you think this would make protons decay?
I naively assumed that baryon would be the lightest baryon, lighter than a proton, so I assumed it would eventually decay to the lowest mass. The other reply explained why this would not be the case.

## 1. Can a (uuu) baryon exist?

Yes, a (uuu) baryon can exist. It is a hypothetical particle made up of three up quarks, and it is predicted by the Standard Model of particle physics.

## 2. Why would a (uuu) baryon be important?

A (uuu) baryon would be important because it would provide evidence for the validity of the Standard Model and help scientists understand the fundamental building blocks of the universe.

## 3. Is there any evidence that (uuu) baryons exist?

Currently, there is no direct evidence for the existence of (uuu) baryons. However, experiments at particle accelerators such as the Large Hadron Collider are actively searching for them.

## 4. Why wouldn't protons decay if (uuu) baryons exist?

According to the Standard Model, protons are stable particles and do not decay. However, the existence of (uuu) baryons could potentially lead to proton decay, which would challenge our current understanding of particle physics.

## 5. What would be the implications if (uuu) baryons were discovered?

If (uuu) baryons were discovered, it would revolutionize our understanding of the universe and the fundamental forces that govern it. It could also lead to new advancements in technology and potential applications in fields such as energy and medicine.

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