CERN Accelerating science

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1.
Centrality determination in heavy-ion collisions with the LHCb detector / LHCb Collaboration
The centrality of heavy-ion collisions is directly related to the medium created therein. A procedure to determine the centrality of collisions with the LHCb detector is implemented for lead-lead collisions at sNN=5TeV and lead-neon fixed-target collisions at sNN=69GeV. [...]
arXiv:2111.01607; CERN-LHCb-DP-2021-002.- 2022-05-05 - 31 p. - Published in : JINST 17 (2022) P05009 Fulltext: 2111.01607 - PDF; document - PDF;
2.
Search for massive long-lived particles decaying semileptonically at 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;
3.
Observation of Two New Excited Ξb0 States Decaying to Λb0Kπ+ / LHCb Collaboration
Two narrow resonant states are observed in the Λb0Kπ+ mass spectrum using a data sample of proton-proton collisions at a center-of-mass energy of 13TeV, collected by the LHCb experiment and corresponding to an integrated luminosity of 6 fb1. The minimal quark content of the Λb0Kπ+ system indicates that these are excited Ξb0 baryons. [...]
arXiv:2110.04497; LHCb-PAPER-2021-025; CERN-EP-2021-188; LHCB-PAPER-2021-025.- Geneva : CERN, 2022-04-21 - 20 p. - Published in : Phys. Rev. Lett. 128 (2022) 162001 Fulltext: PDF; Fulltext from publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
4.
Observation of the suppressed Λb0DpK decay with DK+π and measurement of its CP asymmetry / LHCb Collaboration
A study of Λb0 baryon decays to the DpK final state is presented based on a proton-proton collision data sample corresponding to an integrated luminosity of 9fb1 collected with the LHCb detector. Two Λb0 decays are considered, Λb0DpK with DKπ+ and DK+π, where D represents a superposition of D0 and D¯0 states. [...]
arXiv:2109.02621; LHCb-PAPER-2021-027; CERN-EP-2021-179; LHCB-PAPER-2021-027.- 2021-12-01 - 14 p. - Published in : Phys. Rev. D 104 (2021) 112008 Fulltext: 2109.02621 - PDF; LHCb-PAPER-2021-027 - PDF; Fulltext from publisher: PDF; Related data file(s): ZIP;
5.
Search for the doubly charmed baryon Ξcc+ in the Ξc+ππ+ final state / LHCb Collaboration
A search for the doubly charmed baryon Ξcc+ is performed in the Ξc+ππ+ invariant-mass spectrum, where the Ξc+ baryon is reconstructed in the pKπ+ final state. The study uses proton-proton collision data collected with the LHCb detector at a centre-of-mass energy of 13TeV, corresponding to a total integrated luminosity of 5.4fb1. [...]
arXiv:2109.07292; LHCb-PAPER-2021-019; CERN-EP-2021-155; LHCB-PAPER-2021-019.- Geneva : CERN, 2021-12-16 - 27 p. - Published in : JHEP 2112 (2021) 107 Fulltext: 2109.07292 - PDF; document - PDF; Fulltext from publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
6.
Measurement of χc1(3872) production in proton-proton collisions at s=8 and 13 TeVMeasurement of χc1(3872) production in proton-proton collisions at s = 8 and 13 TeV / LHCb Collaboration
The production cross-section of the χc1(3872) state relative to the ψ(2S) meson is measured using proton-proton collision data collected with the LHCb experiment at centre-of-mass energies of s=8 and 13 TeV, corresponding to integrated luminosities of 2.0 and 5.4 fb1, respectively. The two mesons are reconstructed in the J/ψπ+π final state. [...]
arXiv:2109.07360; LHCb-PAPER-2021-026; CERN-EP-2021-182; LHCB-PAPER-2021-026.- Geneva : CERN, 2022-01-24 - 27 p. - Published in : JHEP 01 (2022) 131 Fulltext: 2109.07360 - PDF; document - PDF; Related data file(s): ZIP;
7.
Measurement of the W boson mass / LHCb Collaboration
The W boson mass is measured using proton-proton collision data at s=13 TeV corresponding to an integrated luminosity of 1.7 fb1 recorded during 2016 by the LHCb experiment. With a simultaneous fit of the muon q/pT distribution of a sample of Wμν decays and the ϕ distribution of a sample of Zμμ decays the W boson mass is determined to be mW=80354±23stat±10exp±17theory±9PDF MeV, where uncertainties correspond to contributions from statistical, experimental systematic, theoretical and parton distribution function sources. [...]
arXiv:2109.01113; LHCb-PAPER-2021-024; CERN-EP-2021-170; LHCB-PAPER-2021-024.- Geneva : CERN, 2022-01-10 - 36 p. - Published in : JHEP 2201 (2022) 036 Fulltext: 2109.01113 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
8.
Measurement of the lifetimes of promptly produced Ωc0 and Ξc0 baryons / LHCb Collaboration
A measurement of the lifetimes of the Ωc0 and Ξc0 baryons is reported using proton--proton collision data at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb1 collected by the LHCb experiment. The Ωc0 and Ξc0 baryons are produced directly from proton interactions and reconstructed in the pKKπ+ final state. [...]
arXiv:2109.01334; LHCb-PAPER-2021-021; CERN-EP-2021-167; LHCB-PAPER-2021-021.- Geneva : CERN, 2022-03-15 - 9 p. - Published in : Sci. Bull. 67 (2022) 479-487 Fulltext: 2109.01334 - PDF; LHCb-PAPER-2021-021 - PDF; Fulltext from publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
9.
Updated search for Bc+ decays to two charm mesons / LHCb Collaboration
A data set corresponding to an integrated luminosity of 9\, fb1 of proton-proton collisions collected by the LHCb experiment has been analysed to search for Bc+D(s)()+(D¯)()0 decays. The decays are fully or partially reconstructed, where one or two missing neutral pions or photons from the decay of an excited charm meson are allowed. [...]
arXiv:2109.00488; LHCb-PAPER-2021-023; CERN-EP-2021-154; LHCB-PAPER-2021-023.- Geneva : CERN, 2021 - 23 p. - Published in : JHEP 2112 (2021) 117 Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
10.
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;

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