Tag: proton collisions
-
CMS observes melting of Upsilon particles in heavy-ion collisions
In 2011, CMS presented early evidence that Upsilon (Υ) particles produced in lead-lead collisions “melt” as a consequence of interacting with the hot nuclear matter created in these heavy-ion interactions.
-
CMS 2012 data already exceed 2011 sample
LHC has delivered 6.65 fb−1 of collisions to CMS in 2012 so far
-
2011 proton collisions come to an end
At about half-past five in the evening on Sunday, 30th October, an e-mail from Run Coordination to the CMS collaboration said: At 17:00 today the LHC dumped the last proton beams for the year to start the machine development period and to prepare for the ion running.
-
Search for a vector-like quark with charge 2/3 in t+Z events
Read the paper: EXO-11-005 In this Letter, CMS describes a search for a kind of fourth-generation T quark with charge 2/3. The search for T-antiT pairs was performed in events that had a pair of oppositely charged leptons (l+l−) as well as an additional isolated charged lepton.
-
Search for Supersymmetry at the LHC in Events with Jets and Missing Transverse Energy
Read the paper: SUS-11-003 The analysis shows no excess of events over the Standard Model expectations.
-
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.
-
Measurement of the Differential Cross Section for Isolated Prompt Photon Production in pp Collisions at 7 TeV
Read the paper: QCD-10-037 This paper extends CMS’s previous measurements of the production rates of isolated prompt photons.
-
Measurement of the Drell–Yan Cross Section in pp Collisions at 7 TeV
Read the paper: QCD-10-037 The measured Drell-Yan production rates, normalised to the production rates in the Z-boson region, show good agreement with the theoretical predictions.
-
Measurement of the Drell–Yan Cross Section in pp Collisions at 7 TeV
Read the paper: QCD-10-037 The measured Drell-Yan production rates, normalised to the production rates in the Z-boson region, show good agreement with the theoretical predictions.
-
Measurement of the Drell–Yan Cross Section in pp Collisions at 7 TeV
Read the paper: QCD-10-037 The measured Drell-Yan production rates, normalised to the production rates in the Z-boson region, show good agreement with the theoretical predictions.