New exotic matter particle, a tetraquark, discovered

Today, the LHCb experiment at CERN is presenting a new discovery at the European Physical Society Conference on High Energy Physics (EPS-HEP). The new particle discovered by LHCb, labeled as Tcc+, is a tetraquark—an exotic ...

Particle physicists study 'little bangs' at the ATLAS experiment

A new result from the ATLAS Collaboration at CERN studies the interactions of photons—particles of light—with lead nuclei at the Large Hadron Collider (LHC). Using new data collection techniques, physicists revealed an ...

ATLAS experiment measures top quark polarization

Unique among its peers is the top quark—a fascinating particle that the scientific community has been studying in detail since the 90s. Its large mass makes it the only quark to decay before forming bound states (a process ...

ATLAS experiment searches for 'charming' decay of the Higgs boson

Key to understanding the Higgs boson and its role in the Standard Model is understanding how it interacts with matter particles, i.e. quarks and leptons. There are three generations of matter particles, varying in mass from ...

Studying top quarks at high and not-so-high energies

CERN's Large Hadron Collider (LHC) is famous for colliding protons at world-record energies—but sometimes it pays to dial down the energy and see what happens under less extreme conditions. The LHC started operation in ...

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