Results are presented from a search for heavy bottom-like quarks, produced in pairs in pp collisions at √s = 7 TeV, undertaken with the CMS experiment at the LHC. The b′ quarks are assumed to decay exclusively to a top quark and a W boson (tW).
The LHC provides CMS with millions of collisions each second, and a wealth of physics data is obtained from the proton-proton interactions. In order to record all these data for analyses, all CMS sub-detectors have to be performing optimally.
“If you remember, Mark Twain once said, ‘There are three kinds of lies: lies, damned lies, and statistics.’ If you use statistics in an improper way, you could get pretty much any result,” says Greg Landsberg, CMS’s new physics coordinator.
Serbian President Boris Tadic and Director General of the European Organization for Nuclear Research (CERN) Rolf Dieter Heuer signed on Tuesday in Geneva an agreement declaring Serbia a CERN Associate Member State.
Data are the currency of physics. As data accumulate, measurement uncertainty ranges narrow up to a certain point, increasing the potential for discoveries and making non-observations more stringent, with more far-reaching consequences.
On 30th October, scientists at CERN switched off the proton beams for the Large Hadron Collider. The completed 2011 run outdid all expectations, especially for luminosity, and provided the collider's four experiments with an unprecedented amount of data.