44 Result(s)
within
**-Pin Li
Physics
Elementary Particles, Quantum Field Theory
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Article
Open AccessObservation of long-range, near-side angular correlations in proton-proton collisions at the LHC
Results on two-particle angular correlations for charged particles emitted in proton-proton collisions at center-of-mass energies of 0.9, 2.36, and 7 TeV are presented, using data collected with the CMS detect...
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Article
Open AccessCMS tracking performance results from early LHC operation
The first LHC pp collisions at centre-of-mass energies of 0.9 and 2.36 TeV were recorded by the CMS detector in December 2009. The trajectories of charged particles produced in the collisions were reconstructe...
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Article
Open AccessCharged particle multiplicities in pp interactions at \( \sqrt {s} = 0.9 \) , 2.36, and 7 TeV
Measurements of primary charged hadron multiplicity distributions are presented for non-single-diffractive events in proton-proton collisions at centre-of-mass energies of
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Article
Open AccessMeasurement of Bose-Einstein correlations in pp collisions at \( \sqrt {s} = 0.9 \) and 7 TeV
Bose-Einstein correlations between identical particles are measured in samples of proton-proton collisions at 0.9 and 7 TeV centre-of-mass energies, recorded by the CMS experiment at the LHC. The signal is obs...
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Article
Open AccessSearch for supersymmetry in pp collisions at \( \sqrt {s} = 7 \) TeV in events with a single lepton, jets, and missing transverse momentum
Results are reported from a search for physics beyond the standard model in proton-proton collisions at a center-of-mass energy of 7 TeV, focusing on the signature with a single, isolated, high-transverse-mome...
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Article
Open AccessMeasurement of the mass difference between top and antitop quarks
A measurement of the mass difference between the top and the antitop quark (Δm t = m t − ...
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Article
Open AccessMeasurement of the underlying event in the Drell–Yan process in proton–proton collisions at \(\sqrt{s} = 7~\mbox{TeV}\)
A measurement of the underlying event (UE) activity in proton–proton collisions at a center-of-mass energy of 7 TeV is performed using Drell–Yan events in a data sample corresponding to an integrated luminosit...
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Article
Open AccessStudy of the inclusive production of charged pions, kaons, and protons in pp collisions at \(\sqrt{s} = 0.9, 2.76,\mbox{ and }7~\mbox{TeV}\)
Spectra of identified charged hadrons are measured in pp collisions at the LHC for \(\sqrt{s} = 0.9, 2.76,\mbox{ and } 7~\mbox{TeV}\) ...
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Article
Measurement of the top-quark mass in \(\mathrm{t}\overline{\mathrm{t}}\) events with dilepton final states in pp collisions at \(\sqrt{s}=7\ \mbox{TeV}\)
The top-quark mass is measured in proton-proton collisions at \(\sqrt{s} = 7\ \mbox{TeV}\) using a data sample correspo...
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Article
Open AccessSearch for narrow resonances and quantum black holes in inclusive and b-tagged dijet mass spectra from pp collisions at \( \sqrt{s}=7 \) TeV
A search for narrow resonances and quantum black holes is performed in inclusive and b-tagged dijet mass spectra measured with the CMS detector at the LHC. The data set corresponds to 5 fb−1 of integrated luminos...
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Article
Open AccessSearch for heavy quarks decaying into a top quark and a W or Z boson using lepton + jets events in pp collisions at \( \sqrt{s}=7 \) TeV
Results are presented from a search for the pair-production of heavy quarks, \( \mathrm{Q}\overline{\mathrm{Q}} \) , that decay exclusively into a top quark and a W or Z boson. The se...
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Article
Open AccessStudy of the underlying event at forward rapidity in pp collisions at \( \sqrt{s}=0.9,2.76,\;\mathrm{and}\;7\;\mathrm{TeV} \)
The underlying event activity in proton-proton collisions at forward pseudo-rapidity (−6.6 < η < −5.2) is studied with the CMS detector at the LHC, using a novel observable: the ratio of the forward energy densit...
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Article
Open AccessObservation of a new boson with mass near 125 GeV in pp collisions at \( \sqrt{s}=7 \) and 8 TeV
A detailed description is reported of the analysis used by the CMS Collaboration in the search for the standard model Higgs boson in pp collisions at the LHC, which led to the observation of a new boson. The d...
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Article
Open AccessMeasurement of masses in the \(\mathrm{t}\overline{\mathrm{t}}\) system by kinematic endpoints in pp collisions at \(\sqrt{s}=7\ \mathrm{TeV}\)
A simultaneous measurement of the top-quark, W-boson, and neutrino masses is reported for \(\mathrm{t}\overline{\mathrm{t}} \) ev...
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Article
Open AccessMeasurement of the \( \Lambda_{\mathrm{b}}^0 \) lifetime in pp collisions at \( \sqrt{s}=7 \) TeV
A measurement of the \( \Lambda_{\mathrm{b}}^0 \) lifetime using the decay ...
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Article
Open AccessJet and underlying event properties as a function of charged-particle multiplicity in proton–proton collisions at \(\sqrt {s}= 7\ \text{TeV}\)
Characteristics of multi-particle production in proton-proton collisions at \(\sqrt{s}=7\ \mbox{TeV}\) are studied as a function ...
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Article
Open AccessMeasurement of associated W + charm production in pp collisions at \( \sqrt{s} \) = 7 TeV
Measurements are presented of the associated production of a W boson and a charm-quark jet (W + c) in pp collisions at a center-of-mass energy of 7 TeV. The analysis is conducted with a data sample correspondi...
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Article
Open AccessStudy of the production of charged pions, kaons, and protons in pPb collisions at \(\sqrt{s_{NN}} =\; \) 5.02 \(\,\text {TeV}\)
Spectra of identified charged hadrons are measured in pPb collisions with the CMS detector at the LHC at $$\sqrt{s_{NN}} =5.02\,\text ...
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Article
Open AccessObservation of the diphoton decay of the Higgs boson and measurement of its properties
Observation of the diphoton decay mode of the recently discovered Higgs boson and measurement of some of its properties are reported. The analysis uses the entire dataset collected by the CMS experiment in pro...
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Article
Open AccessMeasurement of the ratio of the production cross sections times branching fractions of B c ± → J/ψπ ± and B± → J/ψK ± and \( \mathrm{\mathcal{B}}\left({\mathrm{B}}_{\mathrm{c}}^{\pm}\to \mathrm{J}/\psi {\pi}^{\pm }{\pi}^{\pm }{\pi}^{\mp}\right)/\mathrm{\mathcal{B}}\left({\mathrm{B}}_{\mathrm{c}}^{\pm}\to \mathrm{J}/\psi {\pi}^{\pm}\right) \) in pp collisions at \( \sqrt{s}=7 \) TeV
The ratio of the production cross sections times branching fractions ...
