Category: Article
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Broken mirrors: Do top quarks and Z bosons defy charge-inversion and reflection symmetry?
For the first time, the CMS experiment has employed physics-informed machine learning to observe whether the laws of physics still hold true when top quarks and Z bosons are replaced with their antiparticles and space is reflected.
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It takes two: CMS observes signs of attraction between top quark pairs
An excess in data hints at the existence of a top quark-antiquark quasi-bound state, called “toponium”.
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The flavour of new physics
The CMS Collaboration investigates whether physics plays favorites with quarks.
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Piecing together the puzzle: a comprehensive look at vector boson scattering
The CMS experiment performs a combined measurement of the scattering of W and Z bosons in the several possible final states, improving over the precision of each individual result.
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Dark matter and pencil jets: The search for a low-mass Z’ boson using machine learning
The CMS experiment conducts the first search for dark matter particles produced in association with an energetic narrow jet—the pencil jet.
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Mind the gap! Top quark pairs with W bosons continue to defy the latest predictions
In a recent measurement, the CMS experiment confirms a slight but persistent disagreement between the simulated and the observed rates of events in which a top quark pair is produced accompanied by a W boson.
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Shiny top quarks: what happens when top quarks emit light?
The CMS experiment has conducted a comprehensive study of the rates of production of top quark pairs created along with a photon, both inclusively and as a function of several kinematic variables.
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The Higgs boson as a window into dark matter
The CMS experiment studies the Higgs boson as a potential window into dark matter, and sets constraints on this mechanism, which gives rise to isotropic sprays of low-energy particles.
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Hunting the heavy Z: Searching for a new Z boson by studying hadronic decays of top quark pairs
The CMS experiment has conducted a search for heavy beyond-standard-model particles (referred to as a Z′ boson) that give rise to a top quark-antiquark pair decaying into hadrons.
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Unveiling B Meson Production at CMS
The ratios of the B meson production fractions have been measured for the first time in the CMS experiment.