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CERN Document Server 13 notices trouvées  1 - 10suivant  aller vers la notice: La recherche a duré 0.64 secondes. 
1.
First measurement of Zμ+μZμ+μ angular coefficients in the forward region of pppp collisions at s=13s=13 TeV / LHCb Collaboration
The first study of the angular distribution of μ+μμ+μ pairs produced in the forward rapidity region via the Drell-Yan reaction ppγ/Z+Xl+l+Xppγ/Z+Xl+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 fb1fb1. 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
2.
Observation of the decay Λ0bΛ+cτ¯ντΛ0bΛ+cτ¯¯¯ντ / LHCb Collaboration
The first observation of the semileptonic bb-baryon decay Λ0bΛ+cτ¯ντΛ0bΛ+cτ¯¯¯ντ, with a significance of 6.1σ6.1σ, is reported using a data sample corresponding to 3 fb11 of integrated luminosity, collected by the LHCb experiment at centre-of-mass energies of 7 and 8~TeV at the LHC. The ττ lepton is reconstructed in the hadronic decay to three charged pions. [...]
arXiv:2201.03497; LHCb-PAPER-2021-044; CERN-EP-2021-265; LHCB-PAPER-2021-044.- Geneva : CERN, 2022-05-13 - 21 p. - Published in : Phys. Rev. Lett. 128 (2022) 191803 Fulltext: 2201.03497 - PDF; PhysRevLett.128.191803 - PDF; Related data file(s): ZIP; Supplementary material: ZIP;
3.
Precision measurement of forward ZZ boson production in proton-proton collisions at s=13s=13 TeV / LHCb Collaboration
A precision measurement of the ZZ boson production cross-section at s=13s=13 TeV in the forward region is presented, using pppp collision data collected by the LHCb detector, corresponding to an integrated luminosity of 5.1 fb11. The production cross-section is measured using Zμ+μZμ+μ events within the fiducial region defined as pseudorapidity 2.0<η<4.52.0<η<4.5 and transverse momentum pT>20pT>20 GeV/cc for both muons and dimuon invariant mass 60<Mμμ<12060<Mμμ<120 GeV/c2c2. [...]
arXiv:2112.07458; LHCb-PAPER-2021-037; CERN-EP-2021-246; LHCB-PAPER-2021-037.- Geneva : CERN, 2022-07-05 - 57 p. - Published in : JHEP 2207 (2022) 026 Fulltext: PDF; Related data file(s): ZIP;
4.
Searches for rare B0sB0s and B00 decays into four muons / LHCb Collaboration
Searches for rare B0sB0s and B0B0 decays into four muons are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb1fb1. Direct decays and decays via light scalar and J/ψJ/ψ 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;
5.
Search for massive long-lived particles decaying semileptonically at s=13s=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;
6.
Measurement of J/ψ production cross-sections in pp collisions at s=5 TeV / LHCb Collaboration
The production cross-sections of J/ψ mesons in proton-proton collisions at a centre-of-mass energy of s=5 TeV are measured using a data sample corresponding to an integrated luminosity of 9.13±0.18 pb1, collected by the LHCb experiment. The cross-sections are measured differentially as a function of transverse momentum, pT, and rapidity, y, and separately for J/ψ 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;
7.
Analysis of neutral B-meson decays into two muons / LHCb Collaboration
Branching fraction and effective lifetime measurements of the rare decay B0sμ+μ and searches for the decays B0μ+μ and B0sμ+μγ are reported using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7 TeV, 8 TeV and 13 TeV, corresponding to a luminosity of 9 fb1. The branching fraction B(B0sμ+μ)=(3.09+0.46+0.150.430.11)×109 and the effective lifetime τ(B0sμ+μ)=(2.07±0.29±0.03) are measured, where the first uncertainty is statistical and the second systematic. [...]
arXiv:2108.09284; CERN-CERN-EP-2021-132; LHCb-PAPER-2021-007; LHCB-PAPER-2021-007.- Geneva : CERN, 2022-01-25 - 20 p. - Published in : Phys. Rev. Lett. 128 (2022) 041801 Fulltext: 2108.09284 - PDF; PhysRevLett.128.041801 - PDF; Related data file(s): ZIP;
8.
First measurement of the CP-violating phase in B0sJ/ψ(e+e)ϕ decays / LHCb Collaboration
A flavour-tagged time-dependent angular analysis of B0sJ/ψϕ decays is presented where the J/ψ 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 fb1. [...]
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;
9.
Precise determination of the B0s¯B0s 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;
10.
Measurement of prompt-production cross-section ratio σ(χc2)/σ(χc1) in pPb collisions at sNN = 8.16 TeV / LHCb Collaboration
This Letter reports the first measurement of prompt χc1 and χc2 charmonium production in nuclear collisions at LHC energies. The cross-section ratio σ(χc2)/σ(χc1) is measured in pPb collisions at sNN~=~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;

CERN Document Server : 13 notices trouvées   1 - 10suivant  aller vers la notice:
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