Researchers orbit a muon around an atom, confirm physics is broken The proton's charge radius shouldn't change, and yet it appears to.

In order to measure the charge radius of the proton, the researchers use the electronic interactions in a hydrogen atom and take into account the tiniest details of the atomic structure: the ...

Studies of the proton—its positive charge suitably bound up with a negatively charged electron to make a hydrogen atom—initiated the quantum-mechanical revolution a century ago.

Carboxylic acids are ubiquitous in bioactive organic molecules and readily available chemical building blocks. Carboxylic ...

In 2010, atomic physicists at the Paul Scherrer Institute (PSI) in Switzerland measured the radius of a proton in muonic hydrogen and found it was smaller than previously thought.

An international team of scientists confirms a surprisingly small proton radius with laser spectroscopy of exotic hydrogen.

Researchers can fire a beam of electrons at a hydrogen atom, whose nucleus consists of a single proton; the angles at which the electrons bounce off the proton are determined by its size.

Imidazoles and triazoles are essential chemical compounds used in many medicines, including drugs used to defeat various pathogen-induced infections and cancer. Besides these applications, both ...

But to conclusively solve the proton-radius puzzle, one still needs to understand why there are discrepancies between the latest results and the data from previous hydrogen-spectroscopy 9 and ...

Tauonium, composed of a tauon and its antiparticle, has a Bohr radius of only 30.4 femtometers (1 femtometer = 10 -15 meters), approximately 1/1,741 of the Bohr radius of a hydrogen atom.

Previous teams had inferred the proton’s radius, which is impossible to measure directly, by studying how electrons and protons interact. One method uses the simplest atom, hydrogen, which ...