Browsing Faculty of Engineering by Title
Now showing items 1427-1446 of 3117
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Measurement of jet multiplicity distributions in t(t)over-bar production in pp collisions at root s=7TeV
(Springer Science+Business Media, 2014-08)The normalised differential top quark-antiquark production cross section is measured as a function of the jet multiplicity in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC with the CMS detector. ... -
Measurement of jet substructure observables in t¯t events from proton-proton collisions at √s = 13 TeV
(American Physical Society, 2018-11-29)A measurement of jet substructure observables is presented using tt events in the lepton+jets channel from proton-proton collisions at s=13 TeV recorded by the CMS experiment at the LHC, corresponding to an integrated ... -
Measurement of long-range near-side two-particle angular correlations in pp collisions at s =13 TeV
(2016-04-29)Results on two-particle angular correlations for charged particles produced in pp collisions at a center-of-mass energy of 13 TeV are presented. The data were taken with the CMS detector at the LHC and correspond to an ... -
Measurement of masses in the t(t)over-tilde system by kinematic endpoints in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2013-07)A search for microscopic black holes and string balls is presented, based on a data sample of pp collisions at root s = 8 TeV recorded by the CMS experiment at the Large Hadron Collider and corresponding to an integrated ... -
Measurement of neutral strange particle production in the underlying event in proton-proton collisions at root s=7 TeV
(American Physical Society, 2013-09-01)Measurements are presented of the production of primary K-S(0) and Lambda particles in proton-proton collisions at root s = 7 TeV in the region transverse to the leading charged-particle jet in each event. The average ... -
Measurement of prompt and nonprompt J/psi production in pp and pPb collisions at root s(NN)=5.02 TeV
(Springer International Publishing, 2017-04)This paper reports the measurement of J/psi meson production in proton proton (pp) and proton lead (pPb) collisions at a center-of-mass energy per nucleon pair of 5.02 TeV by the CMS experiment at the LW. The data samples ... -
Measurement of prompt D0 and D0 meson azimuthal anisotropy and search for strong electric fields in PbPb collisions at √sNN = 5.02 TeV
(Elsevier, 2021-05-10)The strong Coulomb field created in ultrarelativistic heavy ion collisions is expected to produce a rapidity-dependent difference (Δv2) in the second Fourier coefficient of the azimuthal distribution (elliptic flow, v2) ... -
Measurement of prompt J/psi pair production in pp collisions at root s = 7 Tev
(Springer Science+Business Media, 2014-09)Production of prompt J/psi meson pairs in proton-proton collisions at root s = 7 TeV is measured with the CMS experiment at the LHC in a data sample corresponding to an integrated luminosity of about 4.7 fb(-1). The two ... -
Measurement of prompt open-charm production cross sections in proton-proton collisions at √s = 13 TeV
(Springer, 2021-12-01)The production cross sections for prompt open-charm mesons in proton-proton collisions at a center-of-mass energy of 13 TeV are reported. The measurement is performed using a data sample collected by the CMS experiment ... -
Measurement of prompt ψ (2S) to J /ψ yield ratios in Pb-Pb and p - p collisions at sNN =2.76 TeV
(American Physical Society, 2014-12-31)The ratio between the prompt ψ(2S) and J/ψ yields, reconstructed via their decays into μ+μ−, is measured in Pb-Pb and p-p collisions at sNN−−−−√=2.76 TeV. The analysis is based on Pb-Pb and p-p data samples collected by ... -
Measurement of prompt ψ(2S) production cross sections in proton–lead and proton–proton collisions at √sNN = 5.02 TeV
(Elsevier, 2019-03-10)Measurements of prompt psi(2S) meson production cross sections in proton-lead (pPb) and proton-proton (pp) collisions at a nucleon-nucleon center-of-mass energy of root s(NN) = 5.02 TeV are reported. The results are based ... -
Measurement of properties of B 0 s → µ + µ − decays and search for B 0 → µ + µ − with the CMS experiment
(Springer Nature, 2020-04-28)Results are reported for the B 0s ! + branching fraction and effective lifetime and from a search for the decay B0 ! + . The analysis uses a data sample of proton-proton collisions accumulated by the CMS experiment in 2011, ... -
Measurement of pseudorapidity distributions of charged particles in proton-proton collisions at root s=8 TeV by the CMS and TOTEM experiments
(Springer Nature, 2014-10)Pseudorapidity ( ηη ) distributions of charged particles produced in proton–proton collisions at a centre-of-mass energy of 8 TeV TeV are measured in the ranges |η|<2.2|η|<2.2 and 5.3<|η|<6.45.3<|η|<6.4 covered by the ... -
Measurement of quark- and gluon-like jet fractions using jet charge in PbPb and pp collisions at 5.02 TeV
(Springer Nature, 2020-07-17)The momentum-weighted sum of the electric charges of particles inside a jet, known as jet charge, is sensitive to the electric charge of the particle initiating the parton shower. This paper presents jet charge distributions ... -
Measurement of spin correlations in tt production using the matrix element method in the muon+jets final state in pp collisions at √s=8 TeV
(Elsevier, 2016-07-10)The consistency of the spin correlation strength in top quark pair production with the standard model (SM) prediction is tested in the muon+jets final state. The events are selected from pp collisions, collected by the CMS ... -
Measurement of the associated production of a Z boson with charm or bottom quark jets in proton-proton collisions at s=13 TeV
(American Physical Society, 2020-08-19)Ratios of cross sections, sigma(Z + c jets)/sigma(Z + jets), sigma(Z + b jets)/sigma(Z + jets), and sigma(Z + c jets)/sigma(Z + b jets) in the associated production of a Z boson with at least one charm or bottom quark jet ... -
Measurement of the average very forward energy as a function of the track multiplicity at central pseudorapidities in proton-proton collisions at √s = 13 TeV
(Springer Nature, 2019-11)The average total energy as well as its hadronic and electromagnetic components are measured with the CMS detector at pseudorapidities -6.6 < eta < -5.2 in proton-proton collisions at a centre-of-mass energy root s = 13 ... -
Measurement of the azimuthal anisotropy of neutral pions in Pb-Pb collisions at root S-NN=2.76 TeV
(American Physical Society, 2013-01-25)irst measurements of the azimuthal anisotropy of neutral pions produced in Pb-Pb collisions at a center-of-mass energy of root S-NN = 2.76 TeV are presented. The amplitudes of the second Fourier component (upsilon(2)) of ... -
Measurement of the azimuthal anisotropy of Υ(1S) and Υ(2S) mesons in PbPb collisions at √sNN = 5.02 TeV
(Elsevier, 2021-08-10)The second-order Fourier coefficients (v2) characterizing the azimuthal distributions of [Formula presented] and [Formula presented] mesons produced in PbPb collisions at s =5.02TeV are studied. The [Formula presented] ... -
Measurement of the B-s(0) ->mu(+)mu(-) branching fraction and search for B-0 -> mu(+)mu(-) with the CMS experiment
(American Physical Society, 2013-09-06)Results are presented from a search for the rare decays B-s(0) -> mu(+) mu(-) and B-0 -> mu(+) mu(-) in pp collisions at root s = 7 and 8 TeV, with data samples corresponding to integrated luminosities of 5 and 20 fb(-1), ...
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