Tag: top quark
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Mirror, mirror on the wall, who is the most CP-even of them all?
In 2012 the ATLAS and CMS collaborations discovered a boson with a mass of 125 GeV, i.e. approximately 125 times the mass of the proton, in proton-proton collisions at the CERN LHC.
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Higgs playing with top in singles and doubles
Measuring the interaction between the Higgs boson and other particles is essential to understand if the particle behaves consistently with predictions.
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Photon pairs illuminate the Higgs particle, top quarks, and their connection
The CMS collaboration has achieved the first observation of a ttH process in a single Higgs boson decay channel. The Higgs boson is examined in its decay to two photons when produced alongside a top quark and antiquark. This enables the measurement of the interaction strength as well as a test of the charge-parity structure…
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A close and complicated relationship: The top quark and the W boson intertwine
The CMS collaboration has examined for the first time the kinematic dependence of the production of a top quark and a W boson. This gives insight into the quantum interference of top quark production at the LHC and allows more accurate background predictions for searches for new particles.
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Three questions that the top quark can answer
For the first time, CMS physicists have measured the production rate of top quark pairs as a function of three experimental observables simultaneously. The new result helps to answer several fundamental questions, among which, the properties of gluons inside protons, the strength of the strong nuclear interaction, and how massive the top quark precisely is.
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Watching the top quark mass run
For the first time, CMS physicists have investigated an effect called the “running” of the top quark mass, a fundamental quantum effect predicted by the Standard Model.
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The CMS collaboration has observed a new production mechanism of top quarks
The top quark is the heaviest particle in the standard model, and since its discovery in 1995 at the Tevatron collider at Fermilab, its study has become prominent in furthering our understanding of fundamental physics.
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New CMS results at Moriond (Electroweak) 2013
New results on the Higgs-like boson, Supersymmetry, and searches for exotic physics
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Precision measurements using top quarks at CMS
Amongst all known elementary particles, the top quark is peculiar: weighing as much as a Tungsten atom, it completes the so-called 3rd generation of quarks and is the only quark whose properties can be directly measured.
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Physics Analysis Summaries for Moriond Conference (Electroweak)
CMS has presented a rich variety of results at the Electroweak Interactions and Unified Theories sessions of the Rencontres de Moriond conference in La Thuile, Italy.