Experimento LHCb encontra indícios de física além do Modelo Padrão

Pesquisadores do Grande Colisor de Hádrons do CERN observaram decaimentos de partículas que divergem das previsões do Modelo Padrão. As descobertas vêm do experimento LHCb e mostram uma tensão de quatro desvios-padrão em relação à teoria. Se confirmados, os resultados podem apontar para partículas ou forças ainda não descobertas.

Os dados provêm de estudos de raros “decaimentos pinguim” envolvendo mésons B, que se transformam em um káon, um píon e dois múons. Os cientistas examinaram ângulos, energias e taxas de decaimento usando registros de cerca de 650 bilhões de decaimentos de mésons B coletados entre 2011 e 2018. As medições diferem das expectativas do Modelo Padrão, com apenas uma chance em 16.000 de que uma flutuação aleatória explique a discrepância, caso a teoria esteja correta.

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