Tag Archive for 'LHC'

Visualization of a data event from the tt¯H(γγ) Had BDT bin with the largest signal over background ratio; the event contains two photon candidates, with a diphoton mass of 125.4 GeV; in addition, six jets are reconstructed using the anti-kt algorithm and R = 0.4, including one jet that is b-tagged using a 77% efficiency working point; the photons correspond to the green towers in the electromagnetic calorimeter, while the jets (b-jets) are shown as yellow (blue) cones. Image credit: ATLAS Collaboration.

Physicists Observe Simultaneous Production of Higgs Boson with Top Quark-Antiquark Pair

Jun 8, 2018 by News Staff

In July 2012, ATLAS (A Toroidal LHC ApparatuS) and CMS (Compact-Muon-Solenoid) experiments at CERN’s Large Hadron Collider jointly announced the discovery...

View of the tunnel where the TOTEM experiment’s proton detectors are located. Image credit: TOTEM Collaboration.

CERN Physicists Find Evidence of Long-Sought Quasiparticle: Odderon

Feb 5, 2018 by News Staff

Physicists from the TOTEM experiment at CERN’s Large Hadron Collider have uncovered evidence of a subatomic quasiparticle dubbed an ‘odderon’ that...

Artist’s impression of a cloud of trapped antihydrogen atoms. Image credit: Chukman So.

CERN’s BASE Experiment Reports 350-Fold Improved Measurement of Antiproton’s Magnetic Moment

Oct 19, 2017 by News Staff

In a paper published this week in the journal Nature, the BASE collaboration at CERN reports the most precise measurement ever made of the magnetic moment...

A candidate event of light-by-light scattering, a very rare process in which two photons interact and change direction, measured in the ATLAS detector. Image credit: CERN.

CERN Physicists Find Direct Evidence of High Energy Light-By-Light Scattering

Aug 15, 2017 by News Staff

Physicists from the ATLAS experiment, one of the four major experiments at CERN’s Large Hadron Collider (LHC) in Switzerland, have found the first direct...

The ATLAS Experiment presented evidence for a first sighting of the Higgs boson decaying to a pair of bottom quarks, with an observed significance of 3.6 sigma. Image credit: ATLAS Collaboration.

Physicists Find Strong Evidence of Higgs Boson Decay to Quarks

Jul 26, 2017 by Enrico de Lazaro

The ATLAS experiment, one of the four major experiments at CERN’s Large Hadron Collider in Switzerland, has reported the first evidence for the decay...

The doubly charmed baryon Ξcc++ contains two charm quarks and one up quark. Image credit: Daniel Dominguez, CERN.

CERN Physicists Confirm Existence of Doubly Charmed Baryons

Jul 6, 2017 by News Staff

The LHCb (Large Hadron Collider beauty) collaboration at CERN’s Large Hadron Collider in Switzerland has reported the observation of a doubly charmed...

Proton-proton collisions events in which two high energy electrons and two high energy muons are observed. Image credit: L. Taylor / T. McCauley / CERN.

Madala Boson: Physicists Predict Existence of New Heavy Particle

Sep 7, 2016 by News Staff

An international team of physicists, led by the University of the Witwatersrand (UW) in Johannesburg, South Africa, predicts the existence of a new particle...

View of the LHCb detector. Image credit: CERN.

CERN Physicists Observe Three New Tetraquark Particles

Jul 6, 2016 by Enrico de Lazaro

Physicists on CERN’s LHCb collaboration say they’ve observed three new exotic particles – X(4274), X(4500) and X(4700) – and also confirmed the...

Installation of the CMS beam pipe. Image credit: CERN / CMS Collaboration.

CERN Physicists Produce ‘Littlest’ Quark-Gluon Plasma

Sep 4, 2015 by News Staff

Physicists from the Compact Muon Solenoid (CMS) Collaboration at CERN’s Large Hadron Collider have produced a quark-gluon plasma – a state of matter...

CERN Physicists Compare Light Nuclei and Antinuclei

Aug 18, 2015 by News Staff

Physicists from the ALICE experiment at CERN’s Large Hadron Collider have measured the difference between mass-to-charge ratios for antideuterons and...

Collisions at 13 TeV send particle tracks through the LHCb detector. Image credit: LHCb.

CERN Physicists Confirm Existence of Pentaquark Particles

Jul 14, 2015 by News Staff

Physicists from CERN’s LHCb experiment announced today the observation of a pentaquark, a hadron consisting of five quarks. Illustration of the possible...

CERN Physicists Confirm Existence of Bs0 Meson

May 14, 2015 by News Staff

The CMS (Compact Muon Solenoid) and LHCb (Large Hadron Collider beauty) collaborations at CERN’s Large Hadron Collider in Switzerland report the first...

An electron (green) hits a proton in a nucleus, creating a pion (green-skinned particle) and transforming the proton into a neutron. Image credit: Joanna Griffin / Jefferson Lab.

CERN Physicists Measure Polarizability of Pion

Feb 16, 2015 by News Staff

Scientists from CERN’s COMPASS collaboration have made the most precise measurement ever of the polarizability of pion – the fundamental low-energy...

LHCb coil moving. Image credit: © CERN, 2003.

CERN Physicists Discover Two New Particles

Nov 19, 2014 by News Staff

Physicists at CERN’s Large Hadron Collider beauty (LHCb) experiment today announced the discovery of two new baryon particles, named Ξb’- and...

Candidate Higgs Decay to four muons recorded by the ATLAS experiment in 2012 (ATLAS)

Techni-Higgs: European Physicists Cast Doubt on Discovery of Higgs Boson

Nov 10, 2014 by News Staff

Two years after CERN scientists announced the discovery of the famed and elusive Higgs Boson, a team of physicists from Denmark, Belgium, and the United...

CERN Physicists Discover New Subatomic Particle

Oct 12, 2014 by News Staff

According to scientists from CERN’s LHCb experiment, the discovery of a new type of meson, named Ds3*(2860)ˉ, will transform our understanding of...

Higgs boson decays to four muons: lines denote other particles, and energy deposited is shown in blue. Image credit: CMS.

Higgs Boson Decays to Fermions, CERN Study Confirms

Jun 23, 2014 by News Staff

New research conducted by physicists from CERN’s Compact Muon Solenoid experiment at the Large Hadron Collider has confirmed that the Higgs boson...

The Large Hadron Collider, the world's largest and most powerful particle accelerator. Image credit: CERN.

Z(4430): CERN Physicists Confirm Existence of Exotic Hadrons

Apr 10, 2014 by News Staff

Scientists from CERN’s Large Hadron Collider beauty collaboration have confirmed the unambiguous observation of the long-sought exotic hadron Z(4430),...

The B0 and B0s meson decays into K and π mesons were studied by CERN scientists. The decay into a negative K meson red track and a positive π green track is show here (LHCb experiment)

CERN Physicists Observe New Matter-Antimatter Difference

Apr 25, 2013 by Sergio Prostak

Scientists from CERN’s Large Hadron Collider beauty (LHCb) experiment have reported the first observation of matter-antimatter asymmetry in the decays...

LHC Physicists Observe Ultra-Rare Particle Decay

Nov 14, 2012 by Sergio Prostak

An international team of scientists using the Large Hadron Collider (LHC) at CERN has observed for the first time one of the rarest particle decays ever...

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