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- POSTPONED - ALICE shines light inside the proton and nuclei

Seminar postponed to a later date

The strong electromagnetic fields generated by ultrarelativistic heavy ions provide the possibility to study photon-induced interactions at the LHC in new kinematic regions. ....

Large Hadron Collider , High Energy Physics , பெரியது ஹாட்ரான் மோதல் , உயர் ஆற்றல் இயற்பியல் ,

ATLAS finds evidence of a rare Higgs boson decay

Since the discovery of the Higgs boson in 2012, scientists in the ATLAS and CMS collaborations at the Large Hadron Collider (LHC) have been hard at work characterising its properties and hunting down the diverse ways in which this ephemeral particle can decay. From the copious but experimentally challenging decay to b-quarks, to the exquisitely rare but low-background decay into four leptons, each offers a different avenue to study the properties of this new particle. Now, ATLAS has found first evidence of the Higgs boson decaying to two leptons (either an electron or a muon pair with opposite charge) and a photon. Known as “Dalitz decay”, this is one of the rarest Higgs boson decays yet seen at the LHC.

For this analysis, ATLAS physicists targeted a Higgs boson decay mediated by a virtual photon. In contrast to the familiar stable, massless photon, this virtual particle typically has a very small (but non-zero) mass and decays instantly to two leptons.

ATLAS phys ....

Large Hadron Collider , High Energy Physics , பெரியது ஹாட்ரான் மோதல் , உயர் ஆற்றல் இயற்பியல் ,

CLOUD at CERN reveals role of iodine acids in atmospheric aerosol formation

Date Time
CLOUD at CERN reveals role of iodine acids in atmospheric aerosol formation
Simulation of the marine atmosphere in the CLOUD chamber. Iodine emitted from the sea and ice is converted by ozone and sunlight into iodic acid and other compounds. These form new particles and increase clouds, warming the polar climate. Cosmic rays strongly enhance the particle formation rates.
(Image: Helen Cawley)
In a paper published today in the journal Science, the CLOUD collaboration at CERN shows that aerosol particles made of iodic acid can form extremely rapidly in the marine boundary layer – the portion of the atmosphere that is in direct contact with the ocean. Aerosol particles in the atmosphere affect the climate, both directly and indirectly, but how new aerosol particles form and influence clouds and climate remains relatively poorly understood. This is particularly true of particles that form over the vast ocean. ....

United States , Eteläuomen Läi , Helen Cawley , Jasper Kirkby , Cyprus Institute , Carnegie Mellon University , Helsinki Institute Of Physics , Lebedev Physical Institute , Finnish Meteorological Institute , Aerodyne Research Inc , Leibniz Institute For Tropospheric Research , Paul Scherrer Institute , California Institute Of Technology , Max Planck Institute For Chemistry , Karlsruhe Institute Of Technology , High Arctic , Research Inc , California Institute , Helsinki Institute , Karlsruhe Institute , Leibniz Institute , Tropospheric Research , Max Planck Institute , Beira Interior , Colorado Boulder , Eastern Finland ,

CLOUD at CERN reveals the role of iodine acids in atmospheric aerosol formation

The results suggest a new mechanism that could accelerate the loss of Arctic sea ice
5 February, 2021
Simulation of the marine atmosphere in the CLOUD chamber. Iodine emitted from the sea and ice is converted by ozone and sunlight into iodic acid and other compounds. These form new particles and increase clouds, warming the polar climate. Cosmic rays strongly enhance the particle formation rates.
(Image: Helen Cawley)
Science, the CLOUD collaboration at CERN shows that aerosol particles made of iodic acid can form extremely rapidly in the marine boundary layer – the portion of the atmosphere that is in direct contact with the ocean. Aerosol particles in the atmosphere affect the climate, both directly and indirectly, but how new aerosol particles form and influence clouds and climate remains relatively poorly understood. This is particularly true of particles that form over the vast ocean. ....

United States , Eteläuomen Läi , Jasper Kirkby , Cyprus Institute , Carnegie Mellon University , Helsinki Institute Of Physics , Lebedev Physical Institute , Finnish Meteorological Institute , Aerodyne Research Inc , Leibniz Institute For Tropospheric Research , Paul Scherrer Institute , California Institute Of Technology , Max Planck Institute For Chemistry , Karlsruhe Institute Of Technology , High Arctic , Research Inc , California Institute , Helsinki Institute , Karlsruhe Institute , Leibniz Institute , Tropospheric Research , Max Planck Institute , Beira Interior , Colorado Boulder , Eastern Finland , Large Hadron Collider ,

ALICE shines light inside the proton and nuclei

ALICE shines light inside the proton and nuclei
home.cern - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from home.cern Daily Mail and Mail on Sunday newspapers.

Large Hadron Collider , High Energy Physics , பெரியது ஹாட்ரான் மோதல் , உயர் ஆற்றல் இயற்பியல் ,