This year's HCAL test beam run in July was completely devoted to studies of hardware that will be used in the upcoming upgrades. During the course of the two weeks the detector was moved in two independent setups – HF and the combined EB+HB+HO –…

CMS published its 100th paper on 3rd August. This accomplishment, unprecedented in its pace, came as a result of many things working together extremely well. Primarily, the performance of the LHC accelerator during the last two years was terrific.…

Please try out the completely new CMS Web site: http://cmsexperiment.web.cern.ch. Leave comments by clicking the "GIVE FEEDBACK" link on the side of the page, or contact Lucas Taylor.

Building 40 at CERN’s Meyrin site was abuzz with excitement as CMS formally inaugurated an art installation featuring a full-size high-resolution photograph of the CMS detector organised by the CMS Communications Group. The unveiling was met with…

This is a collaborative wiki where people write scrappers that can be re-used to trawl the internet or a specific website automatically and find data relating to a particular topic. For instance there is a scrapper that looks through twitter for…

Piazza is an online forum for ask and answer questions. Users ask a question that is then answered by other users and/or identified experts. There is only one space for each answer and answers are edited wiki-style, with versioning - so the forum…

The self-rescue mask training course (biocell training) is now mandatory for accessing the USC55 cavern. Register now !

Building 40 at CERN is going to change its appearance. A beautiful 1:1 maxi-poster of CMS is being installed in the central hall. To celebrate the completion of this installation we would like to invite you to a short drink this coming Friday from…

CMS is now running with 1236 bunches of protons !

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. CMS now can take as much…

Christophe Delaere, from the Université catholique de Louvain in Belgium, has been with CMS for five years. Christophe works on the Tracker, the sub-detector that traces the path of charged particles that are formed in collisions at the LHC. Watch…

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