World-leading measurement
The innermost detector component is made of silicon pixels to improve the resolution with which particle decays can be identified and measured.

Using the new, state-of-the-art detector, the Belle II experiment reported a world-leading measurement of the Λ+𝑐 charmed baryon using the weak decay Λ+𝑐→pK-π+.

“This result will be useful for providing stringent tests of theoretical methods that are used to make predictions for new particles and interactions beyond the Standard Model,” said researchers in a statement.

The detector upgrades at Belle II helped it to make the most precise measurement of the lifetime of the Λ+𝑐 particle, using only a small fraction of the total data sample to be collected over the life of the experiment.