The LHC is back online! This morning we saw first beams splashes in the CMS experiment as the beam was threaded through the LHC full circle!

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Record-breaking collisions seen by CMS

CMS Experiment, CERN

LHC delivers low-energy collisions to CMS

First proton-proton collisions after LS1

CMS is eager to see the first collisions of the LHC Run2. The recent news that the LHC restart may be delayed because of a hardware issue gives us extra time to prepare for those collisions.

Every year, the CMS Young Researcher’s Prize is awarded to CMS members who are less than around eight years into their careers after the completion of their PhD or an equivalent qualification.

“The scientific knowledge we produce is for everyone to share.”

Yes, that’s correct: photon collider.

14 June 2014, London, UK

A few of the results that CMS presented at this year’s Quark Matter conference were highlighted a couple of weeks ago in the CERN Courier article that was also posted on CMS news.

This article originally appeared in the CERN Courier on 22 May 2014.

The new top-quark mass measurement is the single most precise result as yet.

CMS has improved the constraints on the Higgs width, a fundamental property of this unique new particle, by more than two orders of magnitude.

At the time when the minds of a few physicists are occupied with the design of a new detector, and the first meetings take place around a coffee table with detector engineers, the subjects discussed the most are the intensity and homogeneity of the magnetic field, the hermetic nature of the calor

The Tracker is a subdetector that is located closest to the collision point of the LHC’s particle beams inside the CMS detector. It must face an onslaught of billions of particles flying through it each second of operation.

Building robots, using 3D printers and testing chemical reactions is an excellent way to spend your Saturday.

CMS has many different safety systems installed in the underground experimental area. These are designed to protect the detector and all the associated electronics as well as the cavern itself. In case of fire, the last line of defence is the High Expansion Foam System.

From the CMS experimental site at Cessy, France, located at Point 5 on the LHC ring

The first part of the CMS endcap calorimetry, as seen by particles coming from interactions in the centre of the detector, is the "ECAL Preshower" or "ES" for short.

Former Deputy Spokesperson became head of the CMS experiment this month as Joe Incandela’s term came to a close.

Building and operating the CMS Detector is a complicated endeavour! Now, more than 20 years after the detector was conceived, the CMS Bologna group proposes to follow the steps of this challenging project by playing "The Higgs Boson Goose Chase" game, illustrating CMS activities and goals.