Topics of Interest Physics News
Raj Kumar Parashari 16 Feb, 2020 Views: 253
What if you could test a new theory against data from the Large Hadron Collider (LHC)? Better yet, what if the expert knowledge needed to do this was captured in a convenient format? This tall order is now on its way from the ATLAS Collaboration at CERN, with the first open release of full analysis likelihoods from an LHC experiment. "In particle physics, experimentalists develop a very rich summary of measurements, which account for all relevant scattering processes and every source of uncertainty, encapsulated into what we call likelihoods," explains Lukas Heinrich, CERN research fellow working for the ATLAS Experiment. "Likelihoods allow you to compute the probability that the data observed in a particular experiment match a specific model or theory. Effectively, it summarizes every aspect of a particular analysis, from the detector settings, event selection, expected signal and background processes, to uncertainties and theoretical models." Extraordinarily complex and critical to every analysis, likelihoods are one of the most valuable tools produced at the LHC experiments. Their public release will now enable phenomenologists around the world to exploreATLAS data in a whole new way.TheATLAS open likelihoods are available on HEPData, an openaccess repository for experimental particle physics data.
Read more at : https://phys.org/news/2019-12-cern-interactions-theoretical-physicists.html
Original paper : https://cds.cern.ch/record/2684863
From IAPT Magazine Jan 2020