Browsing Exact and Earth Sciences by Title
Now showing items 4004-4023 of 6542
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Observation of B0 → ψ(2S)K0Sπ+π− and B0s → ψ(2S)K0S decays
(2022) [Journal article]Using a data sample of s√=13TeV proton-proton collisions collected by the CMS experiment at the LHC in 2017 and 2018 with an integrated luminosity of 103~fb−1, the B0s→ψ(2S)K0S and B0→ψ(2S)K0Sπ+π− decays are observed with ... -
Observation of collective inner-shell effects for protons backscattered from the Al(110) surface
(2005) [Journal article]The surface peak of 98-keV protons backscattered from a clean Al (110) surface has been studied in detail for three different scattering geometries. The corresponding energy-loss distributions are asymmetric due to the ... -
Observation of deterministic chaos in electrical discharges in gases
(1987) [Journal article]We report that dc-excited discharges in gases display current oscillations which develop into deterministically chaotic behavior. A period-doubling route to chaos characteristic of 1D maps is established for sealed discharges ... -
Observation of double 𝐽/𝜓 meson production in 𝑝Pb collisions at √𝑠NN=8.16 TeV
(2024) [Journal article]The first observation of the concurrent production of two J=ψ mesons in proton-nucleus collisions is presented. The analysis is based on a proton-lead (pPb) data sample recorded at a nucleon-nucleon center-of-mass energy ... -
Observation of electroweak production of Wγ with two jets in proton-proton collisions at √s = 13 TeV
(2020) [Journal article]A first observation is presented for the electroweak production of a W boson, a photon, and two jets in proton-proton collisions. The W boson decays are selected by requiring one identified electron or muon and an imbalance ... -
Observation of electroweak W+W− pair production in association with two jets in proton-proton collisions at √s = 13 TeV
(2023) [Journal article]An observation is reported of the electroweak production of a W+W− pair in association with two jets, with both W bosons decaying leptonically. The data sample corresponds to an integrated luminosity of 138 fb−1 of ... -
Observation of enhanced long-range elliptic anisotropies inside high-multiplicity jets in pp collisions at √s =13TeV
(2024) [Journal article]A search for collective effects inside jets produced in proton-proton collisions is performed via correlation measurements of charged particles using the CMS detector at the CERN LHC. The analysis uses data collected at a ... -
Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √snn= 5.02 TeV
(2021) [Journal article]The first measurement of the dependence of γγ→μ+μ− production on the multiplicity of neutrons emitted very close to the beam direction in ultraperipheral heavy ion collisions is reported. Data for lead-lead interactions ... -
Observation of four top quark production in proton-proton collisions at √𝑠 = 13TeV
(2023) [Journal article]The observation of the production of four top quarks in proton-proton collisions is reported, based on a data sample collected by the CMS experiment at a center-of-mass energy of 13 TeV in 2016–2018 at the CERN LHC and ... -
Observation of Higgs boson decay to bottom quarks
(2018) [Journal article]The observation of the standard model (SM) Higgs boson decay to a pair of bottom quarks is presented. The main contribution to this result is from processes in which Higgs bosons are produced in association with a W or Z ... -
Observation of medium-induced modifications of jet fragmentation in Pb-Pb collisions at √sNN=5.02 TeV using isolated photon-tagged jets
(2018) [Journal article]Measurements of fragmentation functions for jets associated with an isolated photon are presented for the first time in pp and Pb-Pb collisions. The analysis uses data collected with the CMS detector at the CERN LHC at a ... -
Observation of nuclear modifications in W± boson production in pPb collisions at √snn = 8.16 TeV
(2020) [Journal article]The production of W± bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of √snn = 8.16 TeV. Measurements are performed in the W± → μ±vμ channel using a data sample corresponding ... -
Observation of prompt J/ψ meson elliptic flow in high-multiplicity pPb collisions at √sNN = 8.16 TeV
(2019) [Journal article]A measurement of the elliptic flow (v2) of prompt J/ ψmesons in high-multiplicity pPbcollisions is reported using data collected by the CMS experiment at a nucleon-nucleon center-of-mass energy √sNN=8.16 TeV. Prompt J/ ... -
Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometer
(2018) [Journal article]The process pp ! p`+`p( ), with `+` a muon or an electron pair produced at midrapidity with mass larger than 110 GeV, has been observed for the rst time at the LHC in pp collisions at ps = 13TeV. One of the two scattered ... -
Observation of quantum entanglement in top quark pair production in proton–proton collisions at √𝑠=13 TeV
(2024) [Journal article]Entanglement is an intrinsic property of quantum mechanics and is predicted to be exhibited in the particles produced at the Large Hadron Collider. A measurement of the extent of entanglement in top quark-antiquark (t¯t) ... -
Observation of recoil magnetization curves outside the major loop in Co, Fe, and Ni films
(2021) [Journal article]We report a peculiar magnetization reversal observed in magnetron-sputtered Co, Fe, and Ni films. We found that some recoil (minor) magnetization curves lie entirely and way outside the major loop, a phenomenon referred ... -
Observation of same-sign WW production from double parton scattering in proton-proton collisions at √s = 13 TeV
(2023) [Journal article]The first observation of the production of W ± W ± bosons from double parton scattering processes using same-sign electron-muon and dimuon events in proton-proton collisions is reported. The data sample corresponds to an ... -
Observation of sngle tp quark production in association with a Z boson in proton-proton collisions at √s=13 TeV
(2019) [Journal article]Resumo não disponível -
Observation of the 0 b → J/ψ−K+ decay
(2024) [Journal article]Using proton–proton collision data corresponding to an integrated luminosity of 140 fb−1 collected by the CMS experiment at √s = 13 TeV, the 0 b → J/ψ−K+ decay is observed for the first time, with a statistical significance ... -
Observation of the B0 s → X(3872)ϕ Decay
(2020) [Journal article]Using a data sample of proton-proton collisions at √s=13 TeV, corresponding to an integrated luminosity of 140 fb−1 collected by the CMS experiment in 2016–2018, the B0s→X(3872)ϕ decay is observed. Decays into J/ψπ+π− ...
