Tag: SMP
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On the hunt for a rule-breaking heavy boson
The CMS Collaboration probes decays of the Z boson which would defy our expectations of lepton behavior How strict are Nature’s conservation laws governing the interactions among elementary particles?
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How to weigh the W boson using hadrons
An interactive version of the event display is found on a separate, full page here.
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Quarks running for freedom: Probing the strong force at high precision
The CMS experiment achieves the most precise determination of the strength of the strong nuclear force using the rates of production of jets at several centre-of-mass energies.
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Probing interactions among trios of heavy vector bosons at record energy
CMS presents the most precise measurement of WWZ production to date by combining Run 2 data with more recent Run 3 data.
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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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CMS delivers the best-precision measurement of the W boson mass at the LHC
In an extraordinary feat of precision physics, CMS measures the mass of the W boson, and finds it to be in good agreement with the prediction by the Standard Model of particle physics.
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Unexplored Z Boson’s pathways in decays to muons and taus
The CMS Collaboration at CERN has conducted an analysis to explore the differences between tau leptons and muons, the two heavier cousins of the electron, and both also fundamental particles in the Standard Model (SM) of particle physics.
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The heavy force-carriers at record energy
Our current understanding of the nature of elementary particles and their interactions is encapsulated in what is known as the Standard Model (SM) of particle physics.
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Towards a new precision era in the study of electroweak interactions
A fundamental parameter of the Standard Model, the electroweak mixing angle plays a key role in the “Higgs mechanism”, when the W and Z gauge bosons get their masses through electroweak symmetry breaking.
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Run 3 provides the Standard Model with a new victory at the energy frontier
Even if the standard model of particle physics (SM) describes Nature incredibly well, it fails in providing insight to a number of observations such as the existence of dark matter.