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CERN Document Server 214 record trovati  1 - 10successivofine  salta al record: La ricerca ha impiegato 1.45 secondi. 
1.
Constraints on the CKM angle γγ from B±Dh±B±Dh± decays using Dh±hπ0 final states / LHCb Collaboration
A data sample collected with the LHCb detector, corresponding to an integrated luminosity of 9 fb1, is used to measure CP observables in B±Dh± decays, where h() is either a kaon or a pion, and the neutral D meson decay is reconstructed in the three-body final states K±ππ0, π±ππ0, and K±Kπ0. The most suppressed of these modes, B±[π±Kπ0]DK±, is observed with a significance greater than seven standard deviations and constraints on the CKM angle γ are calculated from the combination of the measurements..
arXiv:2112.10617; LHCb-PAPER-2021-036; CERN-EP-2021-255; LHCB-PAPER-2021-036.- Geneva : CERN, 2022-07-15 - 24 p. - Published in : JHEP 2207 (2022) 099 Fulltext: document - PDF; 2112.10617 - PDF; Related data file(s): ZIP;
2.
Identification of charm jets at LHCb / LHCb Collaboration
The identification of charm jets is achieved at LHCb for data collected in 2015-2018 using a method based on the properties of displaced vertices reconstructed and matched with jets. The performance of this method is determined using a dijet calibration dataset recorded by the LHCb detector and selected such that the jets are unbiased in quantities used in the tagging algorithm. [...]
arXiv:2112.08435; LHCb-DP-2021-006.- 2022-02-22 - 22 p. - Published in : JINST 17 (2022) P02028 Fulltext: document - PDF; Aaij_2022_J._Inst._17_P02028 - PDF; 2112.08435 - PDF;
3.
Observation of Λ0bD+pππ and Λ0bD+pππ decays / LHCb Collaboration
The multihadron decays Λ0bD+pππ and Λ0bD+pππ are observed in data corresponding to an integrated luminosity of 3fb1, collected in proton-proton collisions at centre-of-mass energies of 7 and 8TeV by the LHCb detector. Using the decay Λ0bΛ+cπ+ππ as a normalisation channel, the ratio of branching fractions is measured to be
arXiv:2112.02013; LHCb-PAPER-2021-040; CERN-EP-2021-237; LHCB-PAPER-2021-040.- Geneva : CERN, 2022-03-23 - 30 p. - Published in : JHEP 2203 (2022) 153 Fulltext: document - PDF; 2112.02013 - PDF; Related data file(s): ZIP;
4.
Measurement of the photon polarization in Λ0b Λ γ decays / LHCb Collaboration
The photon polarization in bsγ transitions is measured for the first time in radiative b-baryon decays exploiting the unique spin structure of Λ0bΛγ decays. A data sample corresponding to an integrated luminosity of 6fb1 collected by the LHCb experiment in pp collisions at a center-of-mass energy of 13TeV is used. [...]
arXiv:2111.10194; LHCb-PAPER-2021-030; CERN-EP-2021-230.- 2022-03-01 - 11 p. - Published in : Phys. Rev. D 105 (2022) L051104 Fulltext: 2111.10194 - PDF; Lb2L0Gamma_Angular_Paper - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
5.
Study of B+c decays to charmonia and three light hadrons / LHCb Collaboration
Using proton-proton collision data, corresponding to an integrated luminosity of 9fb1 collected with the LHCb detector, seven decay modes of the B+c meson into a J/ψ or ψ(2S) meson and three charged hadrons, kaons or pions, are studied. The decays B+c(ψ(2S)J/ψπ+π)π+, B+cψ(2S)π+π+π, B+cJ/ψK+π+π and B+cJ/ψK+K+K are observed for the first time, and evidence for the B+cψ(2S)K+Kπ+ decay is found, where J/ψ and ψ(2S) mesons are reconstructed in their dimuon decay modes. [...]
arXiv:2111.03001; LHCb-PAPER-2021-034; CERN-EP-2021-216; LHCB-PAPER-2021-034.- Geneva : CERN, 2022-01-13 - 28 p. - Published in : JHEP 2201 (2022) 065 Fulltext: document - PDF; 2111.03001 - PDF; Related data file(s): ZIP;
6.
Angular Analysis of D0π+πμ+μ and D0K+Kμ+μ Decays and Search for CP Violation / LHCb Collaboration
The first full angular analysis and an updated measurement of the decay-rate CP asymmetry of the D0π+πμ+μ and D0K+Kμ+μ decays are reported. The analysis uses proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV. [...]
arXiv:2111.03327; LHCb-PAPER-2021-035; CERN-EP-2021-212.- 2022-06-03 - 11 p. - Published in : Phys. Rev. Lett. 128 (2022) 221801 Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
7.
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;
8.
Tests of lepton universality using B0K0S+ and B+K++ decays / LHCb Collaboration
Tests of lepton universality in B0K0S+ and B+K++ decays where is either an electron or a muon are presented. The differential branching fractions of B0K0Se+e and B+K+e+e decays are measured in intervals of the dilepton invariant mass squared. [...]
arXiv:2110.09501; LHCb-PAPER-2021-038; CERN-EP-2021-208; LHCB-PAPER-2021-038.- Geneva : CERN, 2022-05-11 - 15 p. - Published in : Phys. Rev. Lett. 128 (2022) 191802 Fulltext: PhysRevLett.128.191802 - PDF; 2110.09501 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
9.
Observation of Two New Excited Ξ0b States Decaying to Λ0bKπ+ / LHCb Collaboration
Two narrow resonant states are observed in the Λ0bKπ+ 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 Λ0bKπ+ system indicates that these are excited Ξ0b 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;
10.
Simultaneous determination of CKM angle γ and charm mixing parameters / LHCb Collaboration
A combination of measurements sensitive to the CP violation angle γ of the Cabibbo--Kobayashi--Maskawa unitarity triangle and to the charm mixing parameters that describe oscillations between D0 and ¯D0 mesons is performed. Results from the charm and beauty sectors, based on data collected with the LHCb detector at CERN's Large Hadron Collider, are combined for the first time. [...]
arXiv:2110.02350; LHCb-PAPER-2021-033; CERN-EP-2021-183; LHCB-PAPER-2021-033.- Geneva : CERN, 2021-12-21 - 32 p. - Published in : JHEP 2112 (2021) 141 Fulltext: document - PDF; 2110.02350 - PDF; Related data file(s): ZIP;

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