What is the muon g-2 discovery?

Muon g-2 (pronounced “gee minus two”) is a particle physics experiment at Fermilab to measure the anomalous magnetic dipole moment of a muon to a precision of 0.14 ppm, which will be a sensitive test of the Standard Model. It might also provide evidence of the existence of entirely new particles.

Which is the 5th force?

In physics, there are four observed fundamental interactions (also known as fundamental forces) that form the basis of all known interactions in nature: gravitational, electromagnetic, strong nuclear, and weak nuclear forces. Another proposal is a new weak force mediated by W′ and Z′ bosons. …

How was muon discovered?

Muons were discovered by Carl D. Anderson and Seth Neddermeyer at Caltech in 1936, while studying cosmic radiation. Anderson noticed particles that curved differently from electrons and other known particles when passed through a magnetic field. The existence of the muon was confirmed in 1937 by J. C. Street and E. C.

What is the muon g-2 ring?

The Muon g-2 experiment sends a beam of muons into a ring of magnets, where they circulate thousands of times at nearly the speed of light. Detectors lining the ring allow scientists to determine how fast the muons are precessing.

Why is the Muon g-2 experiment important?

The Muon g-2 experiment hosted at Fermi National Accelerator Laboratory announced April 7 that they had measured a particle called a muon behaving slightly differently than predicted in their giant accelerator. It was the first unexpected news in particle physics in years.

How is g2 measured?

How do we measure g-2? A beam of muons with aligned spins is directed into a storage ring that has a very precisely known magnetic field. To perform this measurement with sufficient precision, E821 stored a total of 100 billion muons in a large electromagnet and observed their spin precessions.

What are the five forces in science?

Types of Forces

Contact Forces	Action-at-a-Distance Forces
Frictional Force	Gravitational Force
Tension Force	Electrical Force
Normal Force	Magnetic Force
Air Resistance Force

What are the force of nature?

If you remember any of the physics you learned in school, it’s possible you may remember that there are four fundamental forces of nature. They are in no particular order gravity, electromagnetism, the weak nuclear force and the strong nuclear force.

What is muon force?

A muon is a type of high-energy particle called a lepton. Like the magnets you might find stuck to a fridge, these tiny particles all have their own magnetic field and spin. The strength of this personalized magnetic field is referred to as the particles’ “magnetic moment” or its “g-factor.”

Which forces do electrons muons and Taus interact with?

Even though electrically charged right-handed particles (electron, muon, or tau) do not engage in the weak interaction specifically, they can still interact electrically, and hence still participate in the combined electro-weak force, although with different strengths (YW).

How does the G-2 experiment work?

The Muon g-2 experiment sends a beam of muons into the storage ring, where they circulate thousands of times at nearly the speed of light. Detectors lining the ring allow scientists to determine how fast the muons are precessing.

Where was the Muon g-2 experiment — that has everyone so excited — conducted?

What does the muon g-2 experiment tell us?

The UK’s Science and Technology Facilities Council (STFC) said the result “provides strong evidence for the existence of an undiscovered sub-atomic particle or new force”. But the results from the Muon g-2 experiment don’t add up to a conclusive discovery yet.

How does Fermilab’s muon g-2 experiment differ from Brookhaven’s?

The new measurement from the Muon g-2 experiment at Fermilab strongly agrees with the value found at Brookhaven and diverges from theory with the most precise measurement to date. The first result from the Muon g-2 experiment at Fermilab confirms the result from the experiment performed at Brookhaven National Lab two decades ago.

Is there a fifth fundamental force that science knows nothing about?

But a recent experiment at the high-tech Argonne National Laboratory just outside of Chicago has provided “strong evidence” that there may be a fifth fundamental force, or a previously undiscovered subatomic particle, that science knows nothing about. A new fundamental force may have been discovered. Pic: Mark Lopez, Argonne National Laboratory

Do muons diverge from the Standard Model prediction?

The first result from the Muon g-2 experiment at Fermilab confirms the result from the experiment performed at Brookhaven National Lab two decades ago. Together, the two results show strong evidence that muons diverge from the Standard Model prediction. Image: Ryan Postel, Fermilab/Muon g-2 collaboration