Muon Lifetime and time dilation effect. Measuring the stopping rate of muons, as a function of depth in the atmosphere to demonstrate the time dilation effect of special relativity. Melinda Jolley.
Measuring the stopping rate of muons, as a function of depth in the atmosphere to demonstrate the time dilation effect of special relativity.
Where do muons come from?
Muons were originally thought to be meson
Not completely sure
Somewhere in deep space?
Very recent NASA research
It’s name is a combination of mu and meson
Femi Coupling Constant (
Nope, it is a Lepton
Nicknamed ‘The Heavy Electron’
𝜇± →e± +2 ν
Determine the Measured Lifetime of the Muon
The Fermi Coupling Constant
Is there no Time Dilation?
Accepted τ = 2.20 µs
Use the measured τ
Rates of Muon decays at one elevation
Approximation for rate at second elevation
Correction factors for Energy Loss over distance and Variations in the shape of the muon energy spectrum
Scintillator is placed at the bottom of a black anodized aluminum alloy tube
Plastic Scintillator made of Organic Transparent Material
Mass of the Muon =
Reduced Planck’s Constant =
Pueblo’s Stopping Rate =
Monarch’s Stopping Rate =
Remember t is the transit time assuming no Time Dilation
t’ assumes Time Dilation Effects
The data was consistent with the Relativistic Time Dilation Hypothesis.
Thanks to:Dr. BrownDr. WallinMy family
Special thanks to Annika, Thomas, and Olivia