The strength of the strong force

Thu, 04 Aug 2022 05:11:47 GMT
Space Daily

Newport News VA (SPX) Aug 03, 2022 Much ado was made about the Higgs boson when this elusive...

Strong force coupling varies with distance between the particles affected by the force.

With Jefferson Lab data, the physicists were able to determine the strong force coupling at the largest distances yet.

A spinoff of a spin experiment At smaller distances between quarks, strong force coupling is small, and physicists can solve for it with a standard iterative method.

At larger distances strong force coupling becomes so big that the iterative method doesn't work anymore.

Despite the challenge of not being able to use the iterative method, Deur, Chen and their co-authors extracted strong force coupling at the largest distances between affected bodies ever.

During the several years of data analysis afterward, the researchers realized they could combine information gathered about the proton and neutron to extract strong force coupling at larger distances.

The lower-energy electron beam was required to examine the strong force at these larger distances: a lower-energy probe allows access to longer time scales and larger distances between affected particles.

"Our measurements show that strong force coupling becomes constant as the distance probed gets larger, which is a sign that gluons have acquired mass through the same mechanism that gives 99% of mass to the proton and the neutron."

The flattening of the strong force coupling at large distances provides evidence that physicists can apply a new, cutting-edge technique called Anti-de Sitter/Conformal Field Theory duality.

Because strong force coupling levels off at larger distances, it is no longer dependent on spacetime scale, meaning the strong force is conformal and AdS/CFT can be applied.

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