[danslo]

>Such proximity in mass makes the decay "difficult," resulting in a longer lifetime of the particle, and indeed Tcc+, is the longest-lived exotic hadron found to date.

So... how long does it live?

[whatshisface]

The resonance width is inversely proportional to the lifetime, and if the resonance width is about 400keV, the particle would live for about 10^-21 seconds. For comparison, neutrons decay via the weak force in about 800 seconds, and delta baryons, a randomly chosen strong force decay, live for 10^-24 seconds. That makes this tetraquark long-lived for a strong decay, but that's way, way faster than a weak decay.

https://en.wikipedia.org/wiki/Resonance_(particle_physics)

[im3w1l]

Despite free neutrons decaying in 800s, there are many stable elements containing neutrons. Would it be possible to imagine a tetraquark as an ingredient of a stable particle?

[BurningFrog]

Then I wonder if this "particle" is just some components that takes 10^-21 seconds to bounce away from each other after colliding?

[phkahler]

Are these decays equivalent to drops to a lower energy state where that energy is mass?

[Gravityloss]

So not usable as spaceship fuel

[kmm]

Fun fact, the reason strange quarks are named strange is because when we discovered the first hadrons containing those quarks, they were strangely long-lived.

Long-lived here meaning 10^-10 seconds, instead of 10^-20 seconds. A whole tenth of a nanosecond!

[ansible]

That is actually quite a long time at the quantum scale.