Most precise ever measurement of W boson mass to be in tension with the Standard Model

Описание: CDF collaboration at Fermilab announces most precise ever measurement of W boson mass to be in tension with the Standard Model


https://news.fnal.gov/2022/04/cdf-col...

The mass of a W boson is about 80 times the mass of a proton, or approximately 80,000 MeV/c^2. Scientists of the Collider Detector at Fermilab collaboration have achieved the world’s most precise measurement. The CDF value has a precision of 0.01 percent and is in agreement with many W boson mass measurements. It shows tension with the value expected based on the Standard Model of particle physics. The horizontal bars indicate the uncertainty of the measurements achieved by various experiments.

CDF co-spokesperson David Toback, Texas A&M University, stated the result is an important contribution to testing the accuracy of the Standard Model. “It’s now up to the theoretical physics community and other experiments to follow up on this and shed light on this mystery,” he added. “If the difference between the experimental and expected value is due to some kind of new particle or subatomic interaction, which is one of the possibilities, there’s a good chance it’s something that could be discovered in future experiments.”

#CDFcollaboration#Fermilab#Wboson

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