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23 Sep | Achintya Rao | Physics
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...
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11 Sep | Achintya Rao | Physics
Read the paper: SUS-11-003 The analysis shows no excess of events over the Standard Model expectations. As a result, exclusion limits were placed on searches for squarks and gluinos in the Constrained Minimal Supersymmetric extension of the Standard...
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18 Aug | Achintya Rao | Physics
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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09 Aug | Achintya Rao | Physics
Read the paper: QCD-10-037 This paper extends CMS’s previous measurements of the production rates of isolated prompt photons. The production rates agree with the predictions of perturbative Quantum Chromodynamics (pQCD), although, at low transverse...
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02 Aug | Achintya Rao | Physics
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. The Drell-Yan process occurs when a quark from one of the colliding...
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28 Jul | Achintya Rao | Physics
Read the paper: BPH-11-002 The observed numbers of events in both decay modes are consistent with those expected in the Standard Model. Upper limits on the branching fraction have been determined at 90% and 95% confidence levels (CL). The Standard...
26 Jul | Achintya Rao | Physics
For the past four months the LHC has been ramping-up the intensity of the beams, creating billions of 7 TeV proton-proton collisions. This has enabled CMS to study a variety of known physics from the Standard Model, including the "re-discovery" of...