Tag: Physics briefings
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How much does the Higgs boson weigh? CMS gives its most precise answer yet
Combining measurements from two Higgs boson decay channels, the CMS experiment determines the particle’s mass to be 125.065 GeV, with an uncertainty of just 88 MeV.
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The ETA meson’s latest rare secret
CMS observes the η meson decaying into two muons and two charged pions for the first time.
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Carried by the current: how charm quarks probe quark–gluon plasma
For the first time, the CMS experiment applies a technique called “event-shape engineering” to understand how charm quarks respond to the expanding geometry of the quark–gluon plasma formed in heavy-ion collisions.
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Chasing dark matter with mysterious electron pairs
The CMS experiment performs the first collider search for “inelastic dark matter” in the case where dark-matter particles travel a measurable distance before decaying into a pair of low-momentum electrons.
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When rare decays enter the precision era
One of the unique features of the weak interaction is its ability to transform one quark flavor into another.
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A needle in the pileup: CMS revives diffractive physics with tagged protons
For the first time at the LHC, W and Z bosons and TeV-scale jets are seen alongside a proton that survived the collision intact, reopening a chapter of forward physics that high pileup had closed.
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The W boson’s simplest decay into hadrons
The CMS experiment utilises proton–proton collision data collected between 2016 and 2026 to search for rare decays of the W boson into three charged hadrons.
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Four gets you more: understanding the strong force with four-way energy correlations
The strong nuclear force is the most mysterious of the four fundamental forces of nature.
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In search of unknown forces: Do W and Z boson pairs reveal new interactions?
CMS sets the world’s most stringent constraints on anomalous interactions between the bosons that carry the electroweak force.
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Lepton–lepton scattering in proton–proton collisions
The CMS experiment uses data collected between 2016 and 2026 to observe, for the first time, leptons (electrons and muons) emitted from protons scattering off one another.