This year's LHC physics run started in March. Since then the machine has broken many records, bringing its luminosity — the number of proton-proton collisions per second — to much higher levels than expected for this year.


We are living in perhaps the most exciting times of the past few decades in High Energy Physics: searching for the Higgs boson, as well as expected and unexpected new physics with one of the most elaborate accelerators ever built, and with complex experimental devices that took more than a decade

A search for physics beyond the standard model in events with at least three leptons and any number of jets is presented. The data sample corresponds to 35 inverse picobarns of integrated luminosity in pp collisions at sqrt(s) = 7 TeV collected by the CMS experiment at the LHC.

Curious minds might wonder why the LHC, which successfully ran at 7 TeV during the pp run of 2010 began the new year with proton collisions at a significantly less energy of 2.76 TeV.

If you buy just about any LHC physicist a beer, and talk for a while, eventually you'll learn that he or she lives for the day when we make the next great discovery at this amazing machine.


Record fill for CMS: recorded 35.5 pb-1 ("inverse picobarns") of collisions - almost as much as we recorded in the whole of 2010!

The t t-bar production cross section and top quark mass are measured in proton-proton collisions at sqrt(s) = 7 TeV in a data sample corresponding to an integrated luminosity of 36 inverse picobarns collected by the CMS experiment.


The CMS collaboration is presenting its latest results this week at the annual Quark Matter conference, held this year in Annecy, France.


The CMS experiment has made several unique measurements using data from LHC collisions of lead nuclei (PbPb, November 2010) at centre-of-mass energies of 2.76 TeV per nucleon pair.


In our Universe today, quarks are always bound together by gluons to form "composite" particles such as protons and neutrons. The Quark-Gluon Plasma, or QGP, often described as a soup-like medium, is a hot, dense state in which these quarks and gluons exist freely, unbound.

The paper, accepted for publication in Physical Review D in April, presents the first measurement of Υ (Upsilon) production at a centre-of-mass collision energy of 7 TeV at the LHC.

Maurizio Pierini has been with CMS since he first started work at CERN in 2007. He tells us about his work, his interests, and why physics is such a big part of his life.
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The Alpha Magnetic Spectrometer (AMS) experiment, designed to study dark matter and anti-matter from the International Space Station, launched successfully aboard the Endeavour shuttle from NASA’s Kennedy Space Center on 16th May, 2011.

Experimentalists at the Large Hadron Collider recently proved effective a simple, new method of looking for evidence of supersymmetry.

At 13:25 on Sunday, 13th March, Deputy Run Coordinator, Luca Malgeri told CMS Times: “The current beam is going to be dumped soon, and the next fill is for collisions.”