Quantum mechanics has a reputation that precedes it. Virtually everyone who has bumped up against the quantum realm, whether ...

New research from physicists at Peking University, China, suggests that some pulsars may have massive mountains on them, ...

The mass of the electron and positron are transformed entirely into energy. Scientists first proposed this experiment in the 1930s, but it wasn’t done until 1970.

This is usually done by firing a high-energy electron beam into a dense solid target. Electrons that are deflected by atoms in the target will radiate photons, which then interact with other target ...

These developments are crucial for future electron–positron colliders, where RF acceleration accounts for over half of total energy use, directly impacting operational costs and CO 2 emissions.

The significance of this work is underscored by the sheer scale of the positron yield. Simulations suggest that at laser ...

Long-term study The HESS observatory in Namibia has made a “unique measurement” of the electron and positron cosmic ray spectrum. (Courtesy: Klepser/DESY/HESS collaboration/CC BY-SA 3.0) A new ...

However, if gluons are real, then the electron-positron annihilation should also produce a gluon alongside the quark-antiquark pair, and this gluon should also hadronize into a third jet.

Our result eliminated the tension between theory and experiment. However, now we had a new tension: between our simulation and the electron–positron results which had withstood 20 years of scrutiny.

"Most axion models do not predict significant annihilation into electron-positron pairs in the way our proposed dark matter does," Balaji said. "Our proposed dark matter subject is sub-GeV ...