Measurements of relativistic time dilatation for positive and negative muons in a circular orbit

  title={Measurements of relativistic time dilatation for positive and negative muons in a circular orbit},
  author={J. M. Bailey and K. Borer and F. H. Combley and H. Drumm and F. Krienen and F. Lange and Emilio Picasso and W. von Ruden and F. J. M. Farley and J. H. Field and Wilfred Flegel and P. M. Hattersley},
The lifetimes of both positive and negative relativistic (γ = 29.33) muons have been measured in the CERN Muon Storage Ring with the results τ+ = 64.419 (58) µs, τ− = 64.368 (29) µs The value for positive muons is in accordance with special relativity and the measured lifetime at rest: the Einstein time dilation factor agrees with experiment with a fractional error of 2×10−3 at 95% confidence. Assuming special relativity, the mean proper lifetime for μ− is found to be τ0− = 2.1948(10) µs the… 
σ± lifetimes and longitudinal acceleration
The interactions of 420—500 Me V/c K− in the 11T hydrogen bubble chamber HYBUC have been used to produce a sample of 120,000 σ± decays in flight1,2. We describe here how these decays were used to
Muon Rings and Frequecy
One of the more convincing experiments in support of Einstein’s special theory of relativity was conducted at CERN in 1977. The experiment involved injecting particles called Muons into a 14 metre
Mössbauer experiments in a rotating system: Recent errors and novel interpretation
We consider the energy shift between emission and absorption lines in the Mössbauer experiments in a rotating system in the view of a recently reported extra component of such a shift, in addition to
Relativistic quantum theory shows that the known Einstein time dilation (ED) approximately holds for the decay law of the unstable particle having definite momentum p (DP). I use a dierent definition
Decay Law of Moving Unstable Particle
Quantum relativistic decay law of moving unstable particle is analytically calculated in the model case of the Breit–Wigner mass distribution. It turns out that Einstein time dilation of the moving
Testing Time Dilation on Fast Ion Beams
We report the status of an experimental test of time dilation in Special Relativity. This is accomplished by simultaneously measuring the forward and backward Doppler shifts of an electronic
Mössbauer experiments in a rotating system on the time dilation effect
-2 (that is Δ Δ Δ ΔE/E=-u 2 /2 c 2 , where u is the tangential velocity of absorber, and c the light velocity in vacuum). The additional dilation of time for the rotating absorber constitutes more
A new relativistic kinematics of accelerated systems
We consider transformations between uniformly accelerated systems, assuming that the clock hypothesis is false. We use the proper velocity–time description of events rather than the usual space–time


Precise measurement of the anomalous magnetic moment of the muon
SummaryThe anomalous magnetic momenta≡1/2 (g−2) of the muon has been measured in the CERN muon storage ring. The result is (116 616±31)·10−8 compared with the theoretical value (116 588±2)·10−8
Around-the-World Atomic Clocks: Predicted Relativistic Time Gains
During October 1971, four cesium beam atomic clocks were flown on regularly scheduled commercial jet flights around the world twice, once eastward and once westward, to test Einstein's theory of
A Method for Eliminating the Wall Shift in the Atomic Hydrogen Maser
The wall shift of the hydrogen maser depends on the collision rate and the average phase shift per collision of the atoms in the storage bulb. By operating at the temperature where the average phase