Most searches for new physics beyond the standard model (SM) focus on particles that decay almost instantly after being produced. However, many theories predict particles that travel a long distance, even up to meters, before decaying. Observing…
We have this idea that we communicate best within our own generation, but is this true? Who is to say that a second-generation lepton and a third-generation quark have nothing in common? Many observed phenomena in particle physics are conspicuously…
Three-jet event with an invariant mass of 7.2 TeV, showing the jets (yellow cones) and the energy deposited in the electromagnetic (green) and hadron (blue) calorimeters.
With the discovery of the Higgs boson, the Standard Model of particle physics…
The standard model (SM) of particle physics is by far the most successful theory describing the experimental observations of particle interactions. Most of the SM interactions preserve the “flavor” of the elementary particles, with the exception of…
Dark matter is mysterious. In some ways, we know a lot about it, including its average density in the universe and upper limits for how strongly the dark matter particles might interact with each other or with “normal” Standard Model particles. In…
Experimental particle physics is like a game of hide and seek. Physicists endeavor to seek what is hidden by exploring all the possibilities. The hidden truths, which interpret the rules of nature, lie within elementary particles and how they…
“The important thing”, says Einstein, “is not to stop questioning”, and we, as humans, never have. What is it all made up of? How does it fit together? We’ve been yearning to answer these questions for aeons, with our collective efforts…
CMS is presenting a wide range of results for the annual winter conference, Rencontres de Moriond. The first week of Moriond — 3–8 March — is devoted primarily to electroweak (EW) studies. Among the CMS results are further studies of the recently…
Results are presented from a search for new physics in which the final state contains a photon (γ) and missing transverse energy (MET). The data correspond to an integrated luminosity of 5.0 fb−1 (inverse femtobarns) collected in pp collisions at √s…
CMS has presented a rich variety of results at the Electroweak Interactions and Unified Theories sessions of the Rencontres de Moriond conference in La Thuile, Italy. Links to the Physics Analysis Summaries (PAS) from CMS made public in the last…
The PAS of EXO-11-005 "Search for T/t' decays to tZ in pp Collisions at sqrt(s) = 7 TeV" is now public. You can find it on CDS at http://cdsweb.cern.ch/record/1367130?ln=en
Congratulations to all involved.
Best regards,
Roberto Tenchini and Gigi…
CMS sees evidence of the Upsilon meson decaying into two tau leptons for the first time at a hadron collider
Beyond our best current understanding of particle physics, encapsulated in the standard model, various theoretical models predict the…