When researchers at the Large Hadron Collider discovered the elusive Higgs particle in 2012, it was a landmark for particle physics. It solved a very thorny problem, validating and allowing the Standard Model of particle physics to hold.
But, as is often the case with new discoveries, while some questions were neatly answered, others arose. And for the Higgs boson, one of those questions is its mass. According to predictions, the particle ought to be around three times heavier than the 125 gigaelectronvolts it is.
We're not sure why it isn't heavier, but a new paper lays out a fascinating solution. According to physicists Raffaele Tito D'Agnolo of Université Paris Saclay in France and Daniele Teresi of CERN, the problem can be resolved if, at the time of the Big Bang, the Universe consisted of many universes – a multiverse.
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