Last year a new finding in particle physics stunned scientists: a fundamental particle responsible for one of the Universe's four fundamental forces was heavier than predicted.
While the W boson can't be directly measured, the mass and energy released as it decays can. Putting the pieces back together requires a considered approach, and a solid starting-point for knowing how collided particles hold together.at the Large Hadron Collider at CERN in Switzerland, using a revised statistical approach based on improved understanding of the processes.
"While the understanding of the detector as well as the effects of contributions from electroweak and top quark background processes have not changed, significant progress has been made in the statistical framework on the extraction of the W boson mass from the data,"For this new research, the team concentrated on particle collision events where the W boson breaks down into lighter particles: electrons, muons, andThe Tevatron measurement came out at 80.
to the 80.357 gigaelectronvolts predicted by the Standard Model. The latest W boson mass measurement is 80.360 gigaelectronvolts, bringing it far closer to the theoretically predicted mass.
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