Resuelto el misterio del muón gracias a un nuevo cálculo preciso

19 de mayo de 2026

Reportado por IA

Un equipo internacional ha demostrado que una discrepancia persistente en el comportamiento magnético del muón se debía a las limitaciones de los cálculos anteriores y no a una física desconocida. El trabajo respalda el Modelo Estándar y elimina uno de los principales indicios de una posible quinta fuerza de la naturaleza.

Investigadores dirigidos por el físico de Penn State Zoltan Fodor dedicaron más de una década a utilizar la cromodinámica cuántica en red en superordenadores para volver a calcular el momento magnético anómalo del muón. Su método híbrido combinó simulaciones teóricas a distancias cortas y medias con datos experimentales a escalas mayores, logrando que la teoría y el experimento coincidieran en menos de media desviación estándar.

Researchers discover contactless magnetic friction

22 de marzo de 2026 Reportado por IA Imagen generada por IA

Scientists at the University of Konstanz have identified a new type of sliding friction that occurs without physical contact, driven by magnetic interactions. This phenomenon breaks Amontons' law, a 300-year-old physics principle, by showing friction peaks at certain distances rather than increasing steadily with load. The findings appear in Nature Materials.

Physicists observe evidence of exotic η′-mesic nucleus

An international team of researchers has detected signs of a rare η′-mesic nucleus, a fleeting particle trapped inside an atomic nucleus. This exotic state, observed in a high-precision experiment, suggests the η′ meson's mass decreases in dense nuclear matter. The finding could shed light on how matter acquires mass through the structure of space's vacuum.

Particles emerge from vacuum in proton collisions for first time

8 de abril de 2026 Reportado por IA

Physicists with the STAR collaboration have observed particles emerging directly from empty space during high-energy proton collisions at Brookhaven National Laboratory. The experiment provides strong evidence that mass can arise from vacuum fluctuations, as predicted by quantum chromodynamics. Quark-antiquark pairs promoted to real particles retained spin correlations tracing back to the vacuum.

Ciencia

Physicists link extreme neutrino to exploding primordial black hole

Ciencia

Physicists confirm predicted magnetic vortices in atom-thin material

Ciencia

Physicists uncover island of inversion in balanced molybdenum nucleus

University of Hamburg students build axion dark matter detector

Undergraduate students at the University of Hamburg have constructed a simple cavity detector to search for axions, hypothetical particles that may constitute dark matter. Despite limited resources, their experiment set new limits on axion properties, as detailed in a recent study. The project demonstrates that small-scale efforts can contribute to major physics challenges.

Scientists reveal three discoveries in nuclear process creating gold

13 de marzo de 2026 Reportado por IA

Nuclear physicists at the University of Tennessee have made three key findings about the rapid neutron-capture process that forms heavy elements like gold in stellar events. Their research, conducted at CERN's ISOLDE facility, clarifies how unstable atomic nuclei decay. The results, published in Physical Review Letters, could refine models of element formation in the universe.

Researchers uncover diagonal reversal in Milky Way's magnetic field

Astronomers have produced a detailed map of the Milky Way's magnetic field, revealing a surprising diagonal reversal in the Sagittarius Arm. The findings, based on new radio telescope data, help explain how this invisible force structures the galaxy. Led by scientists at the University of Calgary, the studies were published this month in The Astrophysical Journal.

14 de mayo de 2026 11:51