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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Physicists observe evidence of exotic η′-mesic nucleus

26 april 2026 Rapporterad av AI

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.

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Ultraheavy nuclei may explain Amaterasu particle origin

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New research suggests the Amaterasu particle, one of the most energetic cosmic rays detected, could be an ultraheavy atomic nucleus rather than a proton. The findings, from scientists at Penn State, were published in Physical Review Letters. They indicate such nuclei could retain extreme energy over vast distances in space.

26 maj 2026 03:32

Mysteriet kring myonen löst genom ny precis beräkning

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