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?

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Expert Answer

Step 1

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

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

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

Advanced Physics homework question answer, step 1, image 1

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