Tag: Physics briefings
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Hunting for a Hidden Side of the Higgs
A new boosted jet technique, powered by machine learning, gives CMS its most sensitive search for Higgs bosons breaking apart into never-before-seen particles.
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Two photons illuminate the path towards the Higgs boson’s hidden partner
CMS has made the first search in the two-photon and two-bottom-quark final state for a heavy particle with masses from one to four trillion electronvolts.
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Two Higgs or not two Higgs? CMS advances the search for Higgs boson pair production
CMS advances the study of Higgs boson’s self-interaction by searching for Higgs boson pairs decaying into bottom quark–antiquark and tau lepton–antilepton pairs in collisions recorded between 2022 and 2024. Is the Standard Model (SM) the ultimate theory of particle physics?
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Is the Higgs boson truly elementary?
CMS probes the highest-energy lepton pairs ever recorded to search for hints pointing to a Higgs boson made of smaller constituents.
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A glimpse of tomorrow’s collider, today
A special test run, with more than twice as many near-simultaneous collisions as usual, allowed CMS to test new methods of tracking and identifying particles, years before the upgraded High-Luminosity LHC comes online.
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A messenger of the hottest matter in the Universe
Using Z bosons, the CMS experiment reveals new details of how the Quark-Gluon Plasma drains energy from energetic quarks and challenges current theoretical descriptions.
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CMS maps the directional patterns of high-momentum particles in light-ion collisions
As high-transverse momentum particles punch through the plasma formed from light ions, the CMS experiment sees a possible imprint from the initial shape of the collisions For the first time, CMS has observed both suppression of high transverse momentum (pT) particles and anisotropy in their azimuthal distributions in a small collision system, which together represent…
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Probing the charm-quark dead cone in the quark-gluon plasma
CMS investigates charm-quark jets in heavy-ion collisions and finds no evidence of additional radiation inside the dead cone When lead ions collide at the Large Hadron Collider, they create an extreme state of matter known as the quark-gluon plasma (QGP), a hot and dense medium similar to the one that filled the Universe shortly after…
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In the wake of partons
The CMS experiment reports the first observation of a “wake” created by a fast-moving parton in quark-gluon plasma.
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Where did all the antimatter go? CMS investigates using B mesons
The CMS experiment uses its largest sample of B mesons to date to perform a high-precision test of subtle differences between matter and antimatter.