CERN Accelerating science

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1.
A precise measurement of the B0 meson oscillation frequency / LHCb collaboration
The oscillation frequency, Δmd, of B0 mesons is measured using semileptonic decays with a D or D meson in the final state, in a data sample of pp collisions collected by the LHCb detector corresponding to an integrated luminosity of 3.0fb1. A combination of the two decay modes gives Δmd=(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.
A new algorithm for identifying the flavour of B0s mesons at LHCb / LHCb collaboration
A new algorithm for the determination of the initial flavour of B0s mesons is presented. The algorithm is based on two neural networks and exploits the b 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
3.
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
4.
Measurements of long-range near-side angular correlations in sNN=5TeV proton-lead collisions in the forward region / LHCb collaboration
Two-particle angular correlations are studied in proton-lead collisions at a nucleon-nucleon centre-of-mass energy of sNN=5TeV, collected with the LHCb detector at the LHC. The analysis is based on data recorded in two beam configurations, in which either the direction of the proton or that of the lead ion is analysed. [...]
arXiv:1512.00439; LHCB-PAPER-2015-040; CERN-PH-EP-2015-308; LHCB-PAPER-2015-040; CERN-PH-EP-2015-308.- Geneva : CERN, 2016-11-10 - 11 p. - Published in : Phys. Lett. B 762 (2016) 473-483 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
5.
First observation of the decay D0Kπ+μ+μ in the ρ0-ω region of the dimuon mass spectrum / LHCb collaboration
A study of the decay D0Kπ+μ+μ is performed using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 2.0 fb1. Decay candidates with muon pairs that have an invariant mass in the range 675--875 MeV/c2 are considered. [...]
arXiv:1510.08367; LHCB-PAPER-2015-043; CERN-PH-EP-2015-283.- Geneva : CERN, 2016-06-10 - 10 p. - Published in : Phys. Lett. B 757 (2016) 558 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
6.
Production of associated Υ and open charm hadrons in pp collisions at s=7 and 8 TeV via double parton scattering / LHCb collaboration
Associated production of bottomonia and open charm hadrons in pp collisions at s=7 and 8TeV is observed using data corresponding to an integrated luminosity of 3fb1 accumulated with the LHCb detector. The observation of five combinations, Υ(1S)D0, Υ(2S)D0, Υ(1S)D+, Υ(2S)D+ and Υ(1S)D+s, is reported. [...]
arXiv:1510.05949; CERN-PH-EP-2015-279; CERN-LHCB-PAPER-2015-046; LHCB-PAPER-2015-046; CERN-PH-EP-2015-279; LHCB-PAPER-2015-046.- Geneva : CERN, 2016-07-11 - 36 p. - Published in : JHEP 07 (2016) 052 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; 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
7.
Search for the rare decays B0J/ψγ and B0sJ/ψγ / LHCb collaboration
A search for the rare decay of a B0 or B0s meson into the final state J/ψγ is performed, using data collected by the LHCb experiment in pp collisions at s=7 and 8 TeV, corresponding to an integrated luminosity of 3 fb1. The observed number of signal candidates is consistent with a background-only hypothesis. [...]
arXiv:1510.04866; LHCB-PAPER-2015-044; CERN-PH-EP-2015-276; LHCB-PAPER-2015-044; CERN-PH-EP-2015-276.- Geneva : CERN, 2015-12-07 - 9 p. - Published in : Phys. Rev. D 92 (2015) 112002 APS Open Access article: PDF; Fulltext: arXiv:1510.04866 - PDF; 10.1103_PhysRevD.92.112002 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
8.
Evidence for the strangeness-changing weak decay ΞbΛ0bπ / LHCb collaboration
Using a pp collision data sample corresponding to an integrated luminosity of 3.0~fb1, collected by the LHCb detector, we present the first search for the strangeness-changing weak decay ΞbΛ0bπ. No b hadron decay of this type has been seen before. [...]
arXiv:1510.03829; LHCB-PAPER-2015-047; CERN-PH-EP-2015-277; LHCB-PAPER-2015-047; CERN-PH-EP-2015-277.- 2015-12-11 - 10 p. - Published in : Phys. Rev. Lett. 115 (2015) 241801 APS Open Access article: PDF; Figures: ZIP; Fulltext: 10.1103_PhysRevLett.115.241801 - PDF; arXiv:1510.03829 - PDF; External link: Figures, tables and other information
9.
Model-independent confirmation of the Z(4430) state / LHCb collaboration
The decay B0ψ(2S)K+π is analyzed using 3 fb1 of pp collision data collected with the LHCb detector. A model-independent description of the ψ(2S)π mass spectrum is obtained, using as input the Kπ mass spectrum and angular distribution derived directly from data, without requiring a theoretical description of resonance shapes or their interference. [...]
arXiv:1510.01951; CERN-PH-EP-2015-244; LHCB-PAPER-2015-038; CERN-PH-EP-2015-244; LHCB-PAPER-2015-038.- 2015-12-29 - 15 p. - Published in : Phys. Rev. D 92 (2015) 112009 APS Open Access article: PDF; Fulltext: 10.1103_PhysRevD.92.112009 - PDF; arXiv:1510.01951 - PDF; External link: Figures, tables and other information
10.
Model-independent measurement of mixing parameters in D0K0Sπ+π decays / LHCb collaboration
The first model-independent measurement of the charm mixing parameters in the decay D0KSπ+π is reported, using a sample of pp collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 1.0 fb1 at a centre-of-mass energy of 7 TeV. The measured values are x=(0.86±0.53±0.17)×102,y=(+0.03±0.46±0.13)×102, where the first uncertainties are statistical and include small contributions due to the external input for the strong phase measured by the CLEO collaboration, and the second uncertainties are systematic..
arXiv:1510.01664; CERN-PH-EP-2015-249; LHCB-PAPER-2015-042; CERN-PH-EP-2015-249; LHCB-PAPER-2015-042.- Geneva : CERN, 2016-04-06 - 25 p. - Published in : JHEP 04 (2016) 033 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; 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

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