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Advanced PhysicsQ&A LibraryA pion and a proton can briefly join together to form a delta particle. A measurement of the energy of the system shows a peak at 1236 MeV, corresponding to the rest energy of the delta particle, with an experimental spread of 120 MeV. What is the lifetime of the delta particle?Question

Asked Feb 25, 2020

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A pion and a proton can briefly join together to form a delta particle. A measurement of the energy of the system shows a peak at 1236 MeV, corresponding to the rest energy of the delta particle, with an experimental spread of 120 MeV. What is the lifetime of the delta particle?

Step 1

Let the experimental spread of the energy corresponding to the rest energy of Δ (delta)particle be denoted as Δ*E.*

Let the lifetime of the Δ (delta) particle be denoted as Δ*t*.

Use the Heisenberg’s uncertainty principle to calculate the lifetime of the delta particle as,

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