CERN Accelerating science

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1.
A precise measurement of the B0B0 meson oscillation frequency / LHCb collaboration
The oscillation frequency, ΔmdΔmd, of B0B0 mesons is measured using semileptonic decays with a DD or DD meson in the final state, in a data sample of pppp collisions collected by the LHCb detector corresponding to an integrated luminosity of 3.0fb1fb1. A combination of the two decay modes gives Δmd=(505.0±2.1±1.0)ns1Δmd=(505.0±2.1±1.0)ns1, where the first uncertainty is statistical and the second is systematic. [...]
arXiv:1604.03475; LHCB-PAPER-2015-031; CERN-EP-2016-084; LHCB-PAPER-2015-031; CERN-EP-2016-084.- Geneva : CERN, 2016-07-21 - 27 p. - Published in : Eur. Phys. J. C 76 (2016) 412 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Figures, tables and other information
2.
Observation of Λ0bψ(2S)pKΛ0bψ(2S)pK and Λ0bJ/ψπ+πpKΛ0bJ/ψπ+πpK decays and a measurement of the Λ0bΛ0b baryon mass / LHCb collaboration
The decays Λ0bψ(2S)pKΛ0bψ(2S)pK and Λ0bJ/ψπ+πpKΛ0bJ/ψπ+πpK are observed in a data sample corresponding to an integrated luminosity of 3fb11, collected in proton-proton collisions at 7 and 8TeV centre-of-mass energies by the LHCb detector. The ψ(2S)ψ(2S) mesons are reconstructed through the decay modes ψ(2S)μ+μψ(2S)μ+μ and ψ(2S)J/ψπ+πψ(2S)J/ψπ+π [...]
arXiv:1603.06961; CERN-EP-2016-070; LHCB-PAPER-2015-060; CERN-EP-2016-070; LHCB-PAPER-2015-060.- Geneva : CERN, 2016-05-23 - 20 p. - Published in : JHEP 05 (2016) 132 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Figures, tables and other information
3.
Observation of B0sˉD0K0SB0s¯D0K0S and evidence for B0sˉD0K0SB0s¯D0K0S decays / LHCb Collaboration
The first observation of the B0sˉD0K0SB0s¯D0K0S decay mode and evidence for the B0sˉD0K0SB0s¯D0K0S decay mode are reported. The data sample corresponds to an integrated luminosity of 3.0 fb1fb1 collected in pppp collisions by LHCb at center-of-mass energies of 7 and 8 TeV. [...]
arXiv:1603.02408; CERN-EP-2016-053; LHCB-PAPER-2015-050; LHCB-PAPER-2015-050; CERN-EP-2016-053.- Geneva : CERN, 2016-04-21 - 9 p. - Published in : Phys. Rev. Lett. 116 (2016) 161802 APS Open Access article: PDF; Fulltext: 10.1103_PhysRevLett.116.161802 - PDF; arXiv:1603.02408 - PDF; Related data file(s): ZIP; External link: Figures, tables and other information
4.
Measurement of the B0sD()+sD()sB0sD()+sD()s branching fractions / LHCb collaboration
The branching fraction of the decay B0sD()+sD()sB0sD()+sD()s is measured using pppp collision data corresponding to an integrated luminosity of 1.0fb11.0fb1, collected using the LHCb detector at a centre-of-mass energy of 77TeV. It is found to be B(B0s D()+sD()s)=(3.05±0.10±0.20±0.34)%,B(B0s D()+sD()s)=(3.05±0.10±0.20±0.34)%, where the uncertainties are statistical, systematic, and due to the normalisation channel, respectively. [...]
arXiv:1602.07543; CERN-EP-2016-028; LHCB-PAPER-2015-053; CERN-EP-2016-028; LHCB-PAPER-2015-053.- Geneva : CERN, 2016-05-20 - 11 p. - Published in : Phys. Rev. D 93 (2016) 092008 APS Open Access article: PDF; Fulltext: 10.1103_PhysRevD.93.092008 - PDF; arXiv:1602.07543 - PDF; Related data file(s): ZIP; External link: Figures, tables and other information
5.
A new algorithm for identifying the flavour of B0sB0s mesons at LHCb / LHCb collaboration
A new algorithm for the determination of the initial flavour of B0sB0s mesons is presented. The algorithm is based on two neural networks and exploits the bb hadron production mechanism at a hadron collider. [...]
arXiv:1602.07252; LHCB-PAPER-2015-056; CERN-EP-2016-030; LHCB-PAPER-2015-056; CERN-EP-2016-030.- Geneva : CERN, 2016-05-17 - 26 p. - Published in : JINST 11 (2016) P05010 Fulltext: 10.1088_1748-0221_11_05_P05010 - PDF; arXiv:1602.07252 - PDF; IOP Open Access article: PDF; Preprint: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
6.
First observation of D0ˉD0D0¯D0 oscillations in D0K+ππ+πD0K+ππ+π decays and measurement of the associated coherence parameters / LHCb Collaboration
Charm meson oscillations are observed in a time-dependent analysis of the ratio of D0K+ππ+πD0K+ππ+π to D0Kπ+ππ+D0Kπ+ππ+ decay rates, using data corresponding to an integrated luminosity of 3.0fb13.0fb1 recorded by the LHCb experiment. The measurements presented are sensitive to the phase-space averaged ratio of doubly Cabibbo-suppressed to Cabibbo-favoured amplitudes rK3πDrK3πD and the product of the coherence factor RK3πDRK3πD and a charm mixing parameter yK3π. [...]
arXiv:1602.07224; LHCB-PAPER-2015-057; CERN-EP-2016-021; LHCB-PAPER-2015-057; CERN-EP-2016-021.- Geneva : CERN, 2016-06-17 - 10 p. - Published in : Phys. Rev. Lett. 116 (2016) 241801 APS Open Access article: PDF; Fulltext: 10.1103_PhysRevLett.116.241801 - PDF; LHCb-PAPER-2015-057 - ZIP; arXiv:1602.07224 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
7.
Constraints on the unitarity triangle angle γ from Dalitz plot analysis of B0DK+π decays / LHCb collaboration
The first study is presented of CP violation with an amplitude analysis of the Dalitz plot of B0DK+π decays, with DK+π, K+K and π+π. The analysis is based on a data sample corresponding to 3.0fb1 of pp collisions collected with the LHCb detector. [...]
arXiv:1602.03455; LHCB-PAPER-2015-059; CERN-EP-2016-024; LHCB-PAPER-2015-059; CERN-EP-2016-024.- Geneva : CERN, 2016-06-30 - 19 p.
APS Open Access article: PDF; APS Open Access erratum: PDF; Fulltext: 10.1103_PhysRevD.93.112018 - PDF; arXiv:1602.03455 - PDF; Related data file(s): ZIP; External link: Figures, tables and other information
8.
Measurement of the difference of time-integrated CP asymmetries in D0KK+ and D0ππ+ decays / LHCb Collaboration
A search for CP violation in D0KK+ and D0ππ+ decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb1, collected using the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The flavour of the charm meson is inferred from the charge of the pion in D+D0π+ and D¯D0π decays. [...]
arXiv:1602.03160; LHCB-PAPER-2015-055; CERN-EP-2016-022; LHCB-PAPER-2015-055; CERN-EP-2016-022.- Geneva : CERN, 2016-05-09 - 10 p. - Published in : Phys. Rev. Lett. 116 (2016) 191601 APS Open Access article: PDF; Fulltext: 10.1103_PhysRevLett.116.191601 - PDF; arXiv:1602.03160 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
9.
Study of ψ(2S) production and cold nuclear matter effects in pPb collisions at sNN=5 TeV / LHCb collaboration
The production of ψ(2S) mesons is studied in dimuon final states using proton-lead collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of 1.6 nb1. [...]
arXiv:1601.07878; LHCB-PAPER-2015-058; CERN-EP-2016-011; LHCb-PAPER-2015-058; CERN-EP-2016-011; LHCB-PAPER-2015-058; CERN-EP-2016-011.- Geneva : CERN, 2016-03-18 - 23 p. - Published in : JHEP 03 (2016) 133 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
10.
Observation of the B0sJ/ψϕϕ decay / LHCb collaboration
The B0sJ/ψϕϕ decay is observed in pp collision data corresponding to an integrated luminosity of 3 fb1 recorded by the LHCb detector at centre-of-mass energies of 7 TeV and 8 TeV. This is the first observation of this decay channel, with a statistical significance of 15 standard deviations. [...]
arXiv:1601.05284; LHCB-PAPER-2015-033; CERN-EP-2016-006; LHCB-PAPER-2015-033; CERN-EP-2016-006.- Geneva : CERN, 2016 - 20 p. - Published in : JHEP 03 (2016) 040 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Figures, tables and other information

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