Novel experiment measures neutron skin in calcium

A new high-precision measurement of the neutron skin in doubly magic calcium-48 may help shed light on proton-neutron interactions inside nuclei. This is the first highly robust electroweak measurement of the neutron skin ...

A 5-sigma standard model anomaly is possible

One of the best chances for proving beyond-the-standard-model physics relies on something called the Cabibbo-Kobayashi-Maskawa (CKM) matrix. The standard model insists that the CKM matrix, which describes the mixing of quarks, ...

Seeking the star stuff that made us

At the 2021 Fall Meeting of the APS Division of Nuclear Physics, two independent research groups will unveil new measurements aiming to explain the birth of half the universe's elements.

Finding sterile neutrinos

Experiments have spotted anomalies hinting at a new type of neutrino, one that would go beyond the standard model of particle physics and perhaps open a portal to the dark sector. But no one has ever directly observed this ...

Examining the origins of proton spin

Where does the proton get its spin? This question has puzzled physicists ever since experiments in the 1980s revealed that a proton's constituent quarks—the most fundamental building blocks of atomic nuclei—account for ...

On the pulse of pulsars and polar light

Faced with the tragic loss of the Arecibo observatory in Puerto Rico and the often prohibitive cost of satellite missions, astronomers are searching for savvy alternatives to continue answering fundamental questions in physics.

page 4 from 19