Candidate di-muon event from the CMS experiment in the B<sub>s</sub> meson mass window. The pair of muons are drawn as red lines extending from the particle collision.
Search for rare decay of neutral B mesons to two muons
At a CERN seminar today, CMS presented results for the search for new physics in the decay of Bs and B0 mesons to two muons, taking into account all of the 4.9 fb−1 of data collected in 2011. The results — upper limits of 7.7 x 10−9 (Bs) and 1.8 x…
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Figure 1: Feynman diagrams for the electroweak production of single Top quarks i
Measurement of the t-channel single Top-quark production rates in pp collisions at 7 TeV
The Top quark is the heaviest of the six quarks of the Standard Model and was discovered only 16 years ago by the Tevatron experiments at Fermilab. In addition to the usual production of Top-AntiTop pairs in accordance with quantum chromodynamics (…
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CMS measurements for the tt-bar production cross-sections and
Measurement of the tt-bar Production Cross Section in pp Collisions at 7 TeV in Lepton + Jets Events Using b-quark Jet Identification
Read the paper: TOP-11-003 The measured production rates of Top-antiTop pairs, where one lepton and four jets of particles is observed in the final state, show good agreement with Quantum Chromodynamics (QCD), the theory of the strong interaction.…
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Invariant mass spectrum of pairs of oppositely-charged muons produced in lead-le
Important heavy-ion results from CMS
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. Phenomena measured for the first time in nucleus-nucleus collisions…
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