New Research Suggests that Protons Are 5 Percent Smaller Than We Thought

Protons, neutrons, and other particles have been researched since their first discovery in the 20th century. While a lot of improvements have been made on the measurement devices, a lot of theories have been produced, and a lot of math has been done; the atomic universe still has mysteries waiting to be solved.

As researchers explore the new territories within the field, they have found out that one of the old measurements is wrong. Researchers at Helmholtz Institute for Radiation and Nuclear Physics at the University of Bonn found out that protons are actually 5 percent smaller than we thought.

Their study has been published with the title of “New Insights into the Nucleon’s Electromagnetic Structure” at Physical Review Letters.

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What does this proton size finding mean?

The measurement devices for atomic particles are very complex. Usually, an electron beam is fired against the particle to form an image that is inferred from the collision. As the energy of the electron gets higher, the measurement becomes more precise but it should not pass a safe threshold where it will not form new particles upon colliding with the atom.

The researchers have developed a method to deduce the size from these high-energy collisions. The result was 0.84 femtometers, around 5% less than the previously thought 0.89 femtometers value. You might think that 5% is not that much of a deal, however, some physicists started to question if our ideas about particles were correct upon this discovery.

Physicists and experts were quite surprised to see this kind of discovery. After all, it is interesting to see a challenge to the old constants in physics. When the questioned systems are too small, even the smallest differences become deciding factors. In addition to that, science is a constantly evolving field, it is good to have some updates.

There might be things that we did not even think about such as “99.4 Percent of Chemicals Being Unsustainable” as I have previously written about. It is good to check the methods from time to time. Protons are no exception.