How to use the particle lifetime from decay width calculator
Find the mean lifetime of an unstable particle from its decay width. Enter decay width in the field above; the mean lifetime are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “particle lifetime from width”, “decay width to lifetime”, “hbar over Gamma”, “calculate particle lifetime from decay width”, “find mean lifetime”.
Formula
Variables
- G — Decay width (MeV)
Worked example
With decay width = 2.5 MeV, the calculator gives mean lifetime ≈ 2.6328 × 10⁻²² s; mean lifetime ≈ 2.6328 × 10⁻⁷ fs.
Frequently asked questions
What is the particle lifetime from decay width calculator used for?
Find the mean lifetime of an unstable particle from its decay width. It helps with questions such as “particle lifetime from width”, “decay width to lifetime”, “hbar over Gamma”.
What is the formula for the particle lifetime from decay width calculation?
Mean lifetime (s) = 6.582e-22 / G. Mean lifetime (fs) = [Mean lifetime] × 1e15. Here G is decay width (MeV).
What inputs do I need for the particle lifetime from decay width calculator?
You need decay width in MeV. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the particle lifetime from decay width calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the particle lifetime from decay width result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.