How is muon mass measured?

How is muon mass measured?

The muon mass is obtained by a least-squares fit, which compares the experimentally observed N(n_S) with simulation values predicted for this distribution by the Fermi description of muon decay via the weak interaction.

How are muons detected?

Muons are charged particles that are just like electrons and positrons, but are 200 times heavier. By tracking its position through the multiple layers of each station, combined with tracker measurements the detectors precisely trace a particle’s path.

What is the mass of a muon?

105.7 MeV/
More about muons Muons have a mass of 105.7 MeV/c2, which is about 200 times the mass of an electron.

How is lifetime of muon calculated?

Temperature and density variations affect the interaction of cosmic ray particles and air molecules in the atmosphere. Here G is the Fermi constant and mµ is the mass of the muon which is roughly equal to 106me. The value of G is 1.136 × 10-5 GeV-2. The lifetime is then given by τ = h/Γ [4].

What is the mass of a muon in KG?

muon mass
Numerical value 1.883 531 627 x 10-28 kg
Standard uncertainty 0.000 000 042 x 10-28 kg
Relative standard uncertainty 2.2 x 10-8
Concise form 1.883 531 627(42) x 10-28 kg

How are muons produced?

We can produce muons by taking a narrow, high-intensity beam of protons and running it into a target made of a metal, such as titanium. This produces a beam of another fundamental particle called the pion. Pions form a beam which fans out.

What are muons used for?

Muons can help detect dangerous nuclear material and see into damaged nuclear power plants. Scientists use muons for archeological purposes to peer inside large, dense objects such as the pyramids in Egypt.

How far can a muon travel?

Even moving at nearly the speed of light, a muon should only be able to travel about 700 meters before it decays, so you might think no muons could ever reach Earth. Not so! Many muons make the entire 10 kilometer trip.

How fast do muons travel?

Muons reach earth with an average velocity of about 0.994c. On earth’s surface, about 1 muon passes through a 1 cm2 area per minute (~10,000 muons per square meter in one minute). Muon flux is constant over time.

What is neutrino mass?

Neutrinos are among the most abundant particles in the Universe. They are also the lightest of all the known subatomic particles that have mass — weighing around 500,000 times less than an electron.

How many muon detectors are there in the world?

Once up and running, detectors can be carried around to measure muon rates in virtually any environment. The team has helped supply nearly 100 detectors to high school and college students, who have sent the instruments up in planes and weather balloons to measure muon rates at high altitudes.

Why are muons used to measure proton charge radius?

Use in measurement of the proton charge radius. The muon is particularly well suited for this purpose because its much larger mass results in a much more compact bound state and hence a larger probability for it to be found inside the proton in muonic hydrogen compared to the electron in atomic hydrogen.

How is a muon detector used in Pingu?

Axani took on the task of designing a prototype muon detector for use in PINGU. Typical muon detectors consist of photomultiplying tubes lined with a scintillator, a material that emits light when struck by a charged particle.

What happens when a muon bounces through a detector?

When a particle such as a muon bounces through the detector, the photomultiplying tube multiplies the current produced by the emitted light. In this way, even a single photon can make a current large enough that it can be measured.