Tag Archive for 'Z boson'

A three-vector-boson event recorded by ATLAS, with one W boson decaying to an electron and a neutrino, one W boson decaying to a muon and a neutrino, and a Z boson decaying to two muons; muons are shown by red lines, the electron by a green line, and ‘missing energy’ from the neutrino by a dashed white line. Image credit: ATLAS / CERN.

CERN Physicists Observe Production of Weak Boson Triplets

Feb 27, 2025 by News Staff

Physicists with the ATLAS Collaboration at CERN’s Large Hadron Collider have announced the first observation of VVZ production — a rare combination...

Event display of a candidate H→ Zγ event with the Z boson decaying μ+μ-. The transverse momenta of the two muon candidates, shown in red, are 72 GeV and 20 GeV. The photon candidate is reconstructed as an unconverted photon with a transverse momentum of 32.5 GeV. Two jets (R=0.4) are represented by light blue cones, with mjj of 965 GeV. The green boxes correspond to energy deposits in cells of the electromagnetic calorimeter, while yellow boxes correspond to energy deposits in cells of the hadronic calorimeter. The invariant mass of the Z boson candidate is 91.1 GeV and the invariant mass of Zγ system is 125.4 GeV. Image credit: ATLAS Collaboration / CERN.

CERN Physicists Find First Evidence for Rare Decay of Higgs Boson

May 29, 2023 by News Staff

Physicists from the ATLAS and CMS collaborations at CERN’s Large Hadron Collider (LHC) have independently conducted extensive searches for the rare Higgs...

ATLAS candidate event for a Higgs boson decaying into two Z bosons that in turn decay into two muons and two electrons. Image credit: CERN.

ATLAS Physicists Measure Decay Width of Higgs Boson

Nov 29, 2022 by News Staff

Physicists from the ATLAS Collaboration at CERN’s Large Hadron Collider (LHC) have performed new measurements of Higgs boson’s decay width, which is...

A Higgs boson candidate transforming into four muons (red lines). Image credit: CERN.

Higgs Boson Has Tiny Lifespan, New Research Confirms

Dec 6, 2021 by News Staff

The Higgs boson is peculiar in many respects. Like most other elementary particles, it is unstable and lives only for an extremely short time, 1.6*10-22...

Event display of a candidate four-top-quark event, where two of the top quarks decay leptonically -- one with a resulting muon (red) and one with an electron (green) -- and two top quarks decay hadronically (green and yellow rectangles). The jets -- b-tagged jets -- are shown as yellow (blue) cones. Image credit: ATLAS Collaboration / CERN.

Physicists Find Strong Evidence of Four-Top Quark Production

Jun 18, 2020 by News Staff

Physicists from the ATLAS Collaboration CERN’s Large Hadron Collider have uncovered strong evidence of the production of four top quarks. This rare process...