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CERN Document Server 64 records found  1 - 10nextend  jump to record: Search took 1.46 seconds. 
1.
Tests of Lepton Flavour Universality at LHCb / Silva Coutinho, Rafael (Syracuse University (US))
LHCb-TALK-2024-155.- Geneva : CERN, 2024 Fulltext: PDF;
In : 42nd International Conference on High Energy Physics, Prague, Cz, 18 - 24 Jul 2024
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2.
Overview of recent LHCb results / Silva Coutinho, Rafael (Syracuse University (US))
LHCb-TALK-2023-048.- Geneva : CERN, 2023 Fulltext: PDF;
In : Prospecting for New Physics through Flavor, Dark Matter, and Machine Learning, Aspen, Colorado, Us, 26 - 31 Mar 2023
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3.
First measurement of $Z \to \mu^+\mu^-$ angular coefficients in the forward region of $pp$ collisions at $\sqrt{s} = 13$ TeV / LHCb Collaboration
The first study of the angular distribution of $\mu^+ \mu^-$ pairs produced in the forward rapidity region via the Drell-Yan reaction $pp \rightarrow \gamma^{*}/Z +X \rightarrow l^+ l^- + X$ is presented, using data collected with the LHCb detector at a centre-of-mass energy of 13TeV, corresponding to an integrated luminosity of 5.1 $\rm{fb}^{-1}$. The coefficients of the five leading terms in the angular distribution are determined as a function of the dimuon transverse momentum and rapidity. [...]
arXiv:2203.01602; LHCb-PAPER-2021-048; CERN-EP-2022-030; LHCB-PAPER-2021-048.- 2022-08-24 - 11 p. - Published in : Phys. Rev. Lett. 129 (2022) 091801 Fulltext: PDF; Related data file(s): ZIP; External link: Previous draft version
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4.
Measurement of $\tau _\text {L}$ using the ${B} _s^0 \rightarrow J/\psi \eta $ decay mode / LHCb Collaboration
Using a proton-proton collision data sample collected by the LHCb detector and corresponding to an integrated luminosity of 5.7 $\text{fb}^{-1}$, the lifetime of the $B_{s}^{0}$ mass eigenstate, $\tau_{L}$, is measured using $B_{s}^{0} \to J/\psi \eta$ decay mode to be $\tau_{L}$ = 1.445 $\pm$ 0.016(stat) $\pm$ 0.008(syst) ps. A combination of this result with a previous LHCb analysis using an independent dataset corresponding to 3 $\text{fb}^{-1}$ of integrated luminosity gives $\tau_{L}$ = 1.452 $\pm$ 0.014 $\pm$ 0.007 $\pm$ 0.002 ps, where the first uncertainty is statistical, the second due to the uncorrelated part of the systematic uncertainty and the third due to the correlated part of the systematic uncertainty..
arXiv:2206.03088; LHCb-PAPER-2022-010 CERN-EP-2022-099; CERN-EP-2022-099; LHCb-PAPER-2022-010.- 2023-07-17 - 14 p. - Published in : Eur. Phys. J. C 83 (2023) 629 Fulltext: 2206.03088 - PDF; document - PDF;
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5.
Searches for rare $ {B}_s^0 $ and B$^{0}$ decays into four muons / LHCb Collaboration
Searches for rare $B_s^0$ and $B^0$ decays into four muons are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 $\text{fb}^{-1}$. Direct decays and decays via light scalar and $J/\psi$ resonances are considered. [...]
arXiv:2111.11339; LHCb-PAPER-2021-039; CERN-EP-2021-236.- 2022-03-17 - 27 p. - Published in : JHEP 2203 (2022) 109 Fulltext: 2111.11339 - PDF; document - PDF; Fulltext from publisher: PDF; Related data file(s): ZIP;
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6.
Search for massive long-lived particles decaying semileptonically at $\sqrt{s}=13$ TeV / LHCb Collaboration
A search is performed for massive long-lived particles (LLP) decaying semileptonically into a muon and two quarks. Two kinds of LLP production processes were considered. [...]
arXiv:2110.07293; LHCb-PAPER-2021-028; CERN-EP-2021-186; LHCB-PAPER-2021-028.- Geneva : CERN, 2022-04-28 - 31 p. - Published in : Eur. Phys. J. C 82 (2022) 373 Fulltext: 2110.07293 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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7.
Measurement of $J/\psi$ production cross-sections in $pp$ collisions at $\sqrt{s}=5$ TeV / LHCb Collaboration
The production cross-sections of $J/\psi$ mesons in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=5$ TeV are measured using a data sample corresponding to an integrated luminosity of $9.13\pm0.18~\text{pb}^{-1}$, collected by the LHCb experiment. The cross-sections are measured differentially as a function of transverse momentum, $p_{\text{T}}$, and rapidity, $y$, and separately for $J/\psi$ mesons produced promptly and from beauty hadron decays (nonprompt). [...]
arXiv:2109.00220; LHCb-PAPER-2021-020; CERN-EP-2021-156; LHCB-PAPER-2021-020.- Geneva : CERN, 2021 - 34 p. - Published in : JHEP 2111 (2021) 181 Fulltext: PDF; Fulltext from publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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8.
First measurement of the $C\!P$-violating phase in ${{B} ^0_{s}} \!\rightarrow {{J /\psi }} (\rightarrow e ^+e ^-$)$\phi $ decays / LHCb Collaboration
A flavour-tagged time-dependent angular analysis of $B^0_s\to J/\psi\phi$ decays is presented where the $J/\psi$ meson is reconstructed through its decay to an $e^+e^-$ pair. The analysis uses a sample of $pp$ collision data recorded with the LHCb experiment at centre-of-mass energies of $7$ and $8$ TeV, corresponding to an integrated luminosity of $3$ fb$^{-1}$. [...]
arXiv:2105.14738; LHCb-PAPER-2020-042; CERN-EP-2021-064; LHCB-PAPER-2020-042.- Geneva : CERN, 2021-11-24 - 28 p. - Published in : Eur. Phys. J. C 81 (2021) 1026 Fulltext: document - PDF; LHCb-PAPER-2020-042 - PDF; 2105.14738 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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9.
Precise determination of the $B_{\mathrm{s}}^0$–$\overline B_{\mathrm{s}}^0$ oscillation frequency / LHCb Collaboration
 Mesons comprising a beauty quark and a strange quark can oscillate between particle (B0s) and antiparticle (B0sbar) flavour eigenstates, with a frequency given by the mass difference between heavy and light mass eigenstates, deltams. Here we present a measurement of deltams using B0s2DsPi decays produced in proton-proton collisions collected with the LHCb detector at the Large Hadron Collider. [...]
arXiv:2104.04421; LHCb-PAPER-2021-005; CERN-EP-2021-047; LHCB-PAPER-2021-005.- Geneva : CERN, 2022-01-06 - 20 p. - Published in : Nature Phys. 18 (2022) 1-5 Fulltext: 2104.04421 - PDF; document - PDF; LHCb-PAPER-2021-005-arXiv - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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10.
Measurement of prompt-production cross-section ratio $\sigma(\chi_{c2})/\sigma(\chi_{c1})$ in $p$Pb collisions at $\sqrt{s_{NN}}$ = 8.16 TeV / LHCb Collaboration
This Letter reports the first measurement of prompt $\chi_{c1}$ and $\chi_{c2}$ charmonium production in nuclear collisions at LHC energies. The cross-section ratio $\sigma(\chi_{c2}) / \sigma(\chi_{c1})$ is measured in $p$Pb collisions at $\sqrt{s_{NN}}$~=~8.16~TeV, collected with the LHCb experiment. [...]
arXiv:2103.07349; LHCb-PAPER-2020-048; CERN-EP-2021-024F; CERN-EP-2021-024; LHCB-PAPER-2020-048.- 2021-06-09 - 18 p. - Published in : Phys. Rev. C 103 (2021) 064905 Article from SCOAP3: PDF; Fulltext: 2103.07349 - PDF; LHCb-PAPER-2020-048 - PDF; Related data file(s): ZIP;
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CERN Document Server : 64 records found   1 - 10nextend  jump to record:
See also: similar author names
7 Coutinho, R
1 Coutinho, R Silva
88 Coutinho, R Silva
36 Coutinho, R.Silva
1 Coutinho, Rafael
2 Coutinho, Rafael Silva
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