Fysik & material 3.1

Physicists tighten limits on exotic particle decay that could reshape physics

Researchers at CERN's LHCb experiment found no evidence of rare B meson decay patterns that would violate a fundamental physics law. The null result narrows where scientists should look for new physics beyond the Standard Model—crucial for companies and institutions investing in next-generation particle detector technology and fundamental research.

Originaltitel: Search for lepton-number-violating B- → D(*)+μ-μ- decays

Abstrakt

A search is performed for lepton-number-violating B- → D(*)+μ-μ- decays, using data collected by the LHCb experiment in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb-1. No significant signal is observed, and upper limits are set on the branching fractions, B(B- → D+μ-μ-) < 4.6 x 10-8 and B(B- → D*+μ-μ-) < 5.9 x 10-8, at the 95% confidence level.

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