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Quantum Gravity and the Proton Radius

Using quantum gravity to resolve differences in measurement?

This inconsistency between proton radius values, called the “proton radius puzzle,” has gained a lot of attention lately and has led to several proposed explanations. Some of these explanations include new degrees of freedom beyond the Standard Model, as well as extra dimensions.

Now in a new paper published in EPL, physicist Roberto Onofrio at the University of Padova in Padova, Italy, and the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts, has suggested that the muonic hydrogen experiment may be providing a hint of quantum gravity. He has proposed that the proton radius puzzle can be solved by considering a new theory of quantum gravity that is based on the unification of gravity and the weak force, also called “gravitoweak unification.”

Gravity, thus far, has been the one force that’s resisted unification.  We’ll see where this goes.

Posted in SciTech.