Mysteriet kring myonen löst genom ny precis beräkning

19 maj 2026

Rapporterad av AI

Ett internationellt forskarlag har visat att en långvarig diskrepans i myonens magnetiska beteende berodde på tidigare begränsningar i beräkningarna snarare än okänd fysik. Arbetet stödjer standardmodellen och eliminerar en viktig ledtråd till en möjlig femte naturkraft.

Forskare ledda av fysikern Zoltan Fodor vid Penn State tillbringade mer än ett decennium med att använda gitter-kvantkromodynamik på superdatorer för att omberäkna myonens anomala magnetiska moment. Deras hybridmetod kombinerade teoretiska simuleringar på korta och medellånga avstånd med experimentella data i större skala, vilket gav en överensstämmelse mellan teori och experiment på mindre än en halv standardavvikelse.

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Lab scene depicting contactless magnetic friction discovery: hovering metallic blocks with magnetic fields and graphs breaking Amontons' law.

Researchers discover contactless magnetic friction

22 mars 2026 Rapporterad av AI Bild genererad av AI

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 april 2026 Rapporterad av AI

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.

Vetenskap

Physicists link extreme neutrino to exploding primordial black hole

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Physicists confirm predicted magnetic vortices in atom-thin material

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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 mars 2026 Rapporterad av AI

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 maj 2026 11:51

Mysteriet kring myonen löst genom ny precis beräkning

Relaterade artiklar

Researchers discover contactless magnetic friction

Physicists observe evidence of exotic η′-mesic nucleus

Particles emerge from vacuum in proton collisions for first time

Physicists link extreme neutrino to exploding primordial black hole

Physicists confirm predicted magnetic vortices in atom-thin material

Physicists uncover island of inversion in balanced molybdenum nucleus

University of Hamburg students build axion dark matter detector

Scientists reveal three discoveries in nuclear process creating gold

Researchers uncover diagonal reversal in Milky Way's magnetic field

Dampe telescope reveals universal pattern in cosmic rays

Physicists revive 1773 experiment to hunt dark matter

Physicists uncover tiny flaw in time from quantum collapse models

Scientists observe wave-like behavior in positronium for first time

Experiments confirm proton radius at 0.84 femtometres

Physicists solve plasma asymmetry mystery in tokamaks

Researchers create an ‘atomic movie’ showing how atoms roam before a radiation-driven decay

Miniature magnet rivals strength of world's largest ones

Researchers flip ferromagnet polarity using laser beam

Scientists make light mimic quantum hall effect

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