From the CERN web: data analysis, di-jet asymmetry and more

This section highlights articles, blog posts and press releases published in the CERN web environment over the past weeks. This way, you won’t miss a thing...


Image: LHCb Collaboration.

Revolutionary improvement of data acquisition and analysis
14 October – LHCb Collaboration

The procedure of data taking and analysis at hadron colliders is performed in two steps. In the first one, called by physicists “online”, the data are recorded by the detector, read-out by fast electronics and computers, and finally a selected fraction of events is stored on disks and magnetic tapes. The stored events are then analysed later in the so called “offline analysis”. 

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 New measurements of the momentum imbalance in the di-jet system, using a distribution parameter known as xJ.

New ATLAS Results Presented at Quark Matter 2015
7 October - ATLAS Collaboration

The Quark Matter 2015 conference has just concluded in Kobe, Japan. Over 700 physicists made the trip to discuss the latest developments in the field.

ATLAS prepared a variety of new results using data collected since 2010. These include exciting new measurements of di-jet asymmetry, jet sub-structures, muon suppression in lead-lead collisions, and measurements of the "ridge" in proton-proton collisions. ATLAS also presented the first measurement of the forward-backward multiplicity correlations in all three collision systems.

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View of the SNO detector under construction. (Image: SNO)

Neutrinos: after the Nobel Prize, the hunt continues
6 October 

CERN congratulates the two laureates of the 2015 Physics Nobel Prize: Takaaki Kajita, from the Super-Kamiokande Collaboration in Japan, and Arthur B. McDonald, from the Sudbury Neutrino Observatory (SNO) in Canada. They were awarded the prize for: “the discovery of neutrino oscillations, which shows that neutrinos have mass”. The two experiments independently demonstrated that neutrinos can change or “oscillate” from one type to another. This discovery at the turn of the millennium, more than 40 years after the prediction of the phenomenon by Italian physicist Bruno Pontecorvo, has had a profound impact on our understanding of the Universe.

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