CERN Accelerating science

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1.
Dalitz Plot analysis of the D+KK+K+D+KK+K+ decay / LHCb Collaboration
The resonant structure of the doubly Cabibbo-suppressed decay D+KK+K+D+KK+K+ is studied for the first time. The measurement is based on a sample of pppp-collision data, collected at a centre-of-mass energy of 8 TeV with the LHCb detector and corresponding to an integrated luminosity of 2 fb11. [...]
arXiv:1902.05884; LHCb-PAPER-2018-039; CERN-EP-2018-336.- Geneva : CERN, 2019-04-08 - 37 p. - Published in : JHEP 04 (2019) 063 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
2.
Measurement of the ratio of branching fractions of the decays Λ0bψ(2S)ΛΛ0bψ(2S)Λ and Λ0bJ/ψΛΛ0bJ/ψΛ / LHCb Collaboration
Using pppp collisions corresponding to 3fb1fb1 integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8TeVTeV, the ratio of branching fractions B(Λ0bψ(2S)Λ)/B(Λ0bJ/ψΛ)=0.513±0.023(stat)±0.016(syst)±0.011(B) is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used..
arXiv:1902.02092; LHCb-PAPER-2017-041; CERN-EP-2019-003.- Geneva : CERN, 2019-03-22 - 16 p. - Published in : JHEP 03 (2019) 126 Article from SCOAP3: PDF; Fulltext: LHCb-Paper-2017-041 - PDF; 1902.02092 - PDF; Related data file(s): ZIP;
3.
Observation of the doubly Cabibbo-suppressed decay Ξ+cpϕ / LHCb Collaboration
The doubly Cabibbo-suppressed decay Ξ+cpϕ with ϕK+K is observed for the first time, with a statistical significance of more than fifteen standard deviations. The data sample used in this analysis corresponds to an integrated luminosity of 2 fb1 recorded with the LHCb detector in pp collisions at a centre-of-mass energy of 8 TeV. [...]
arXiv:1901.06222; LHCb-PAPER-2018-040; CERN-EP-2018-349.- 2019-04-10 - 17 p. - Published in : JHEP 04 (2019) 084 Article from SCOAP3: PDF; Fulltext: PDF;
4.
Measurement of the branching fraction and CP asymmetry in B+J/ψρ+ decays / LHCb Collaboration
The branching fraction and direct CP asymmetry of the decay B+J/ψρ+ are measured using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to a total integrated luminosity of 3fb1. The following results are obtained: B(B+J/ψρ+)=(3.81+0.250.24±0.35)×105,ACP(B+J/ψρ+)=0.045+0.0560.057±0.008, where the first uncertainties are statistical and the second systematic. [...]
arXiv:1812.07041; LHCb-PAPER-2018-036; CERN-EP-2018-298; LHCB-PAPER-2018-036.- Geneva : CERN, 2019-06-24 - 21 p. - Published in : Eur. Phys. J. C 79 (2019) 537 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
5.
Search for the rare decay B+μ+μμ+νμ / LHCb Collaboration
A search for the rare leptonic decay B+μ+μμ+νμ is performed using proton-proton collision data corresponding to an integrated luminosity of 4.7 fb1 collected by the LHCb experiment. The search is carried out in the region where the lowest of the two μ+μ mass combinations is below 980 MeV/c2. [...]
arXiv:1812.06004; CERN-EP-2018-293; LHCb-PAPER-2018-037.- Geneva : CERN, 2019-08-13 - 20 p. - Published in : Eur. Phys. J. C 79 (2019) 675 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
6.
Search for CP violation through an amplitude analysis of D0K+Kπ+π decays / LHCb Collaboration
A search for CP violation in the Cabibbo-suppressed D0K+Kπ+π decay mode is performed using an amplitude analysis. The measurement uses a sample of pp collisions recorded by the LHCb experiment during 2011 and 2012, corresponding to an integrated luminosity of 3.0 fb1. [...]
arXiv:1811.08304; LHCb-PAPER-2018-041; CERN-EP-2018-299.- Geneva : CERN, 2019-02-20 - 33 p. - Published in : JHEP 02 (2019) 126 Additional files: ZIP; Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
7.
First Measurement of Charm Production in its Fixed-Target Configuration at the LHC / LHCb Collaboration
The first measurement of heavy-flavour production by the LHCb experiment in its fixed-target mode is presented. The production of J/ψ and D0 mesons is studied with beams of protons of different energies colliding with gaseous targets of helium and argon with nucleon-nucleon centre-of-mass energies of sNN=86.6 and 110.4 GeV, respectively. [...]
arXiv:1810.07907; LHCb-PAPER-2018-023; CERN-EP-2018-266.- Geneva : CERN, 2019-04-03 - 12 p. - Published in : Phys. Rev. Lett. Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
8.
Study of Υ production in pPb collisions at sNN=8.16 TeV / LHCb Collaboration
The production of Υ(nS) mesons (n=1,2,3) in pPb and Pbp collisions at a centre-of-mass energy per nucleon pair sNN=8.16 TeV is measured by the LHCb experiment, using a data sample corresponding to an integrated luminosity of 31.8 nb1. The Υ(nS) mesons are reconstructed through their decays into two opposite-sign muons. [...]
arXiv:1810.07655; LHCb-PAPER-2018-035; CERN-EP-2018-267.- Geneva : CERN, 2018-11-29 - 37 p. Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
9.
Measurement of the charm-mixing parameter yCP / LHCb Collaboration
A measurement of the charm-mixing parameter yCP using D0K+K, D0π+π, and D0Kπ+ decays is reported. The D0 mesons are required to originate from semimuonic decays of B and ¯B0 mesons. [...]
arXiv:1810.06874; CERN-EP-2018-270 and LHCb-PAPER-2018-038; LHCb-PAPER-2018-038; CERN-EP-2018-270; LHCB-PAPER-2018-038.- Geneva : CERN, 2019-01-08 - 10 p. - Published in : 10.1103/PhysRevLett.122.011802 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP; External link: Figures, tables and other information
10.
Measurement of the branching fractions of the decays D+KK+K+, D+ππ+K+ and D+sπK+K+ / LHCb Collaboration
The branching fractions of the doubly Cabibbo-suppressed decays D+KK+K+, D+ππ+K+ and D+sπK+K+ are measured using the decays D+Kπ+π+ and D+sKK+π+ as normalisation channels. The measurements are performed using proton-proton collision data collected with the LHCb detector at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 2.0 fb1. [...]
arXiv:1810.03138; LHCb-PAPER-2018-033; CERN-EP-2018-244; LHCb-PAPER-2018-033 and CERN-EP-2018-244.- Geneva : CERN, 2019-03-27 - 22 p. - Published in : JHEP 03 (2019) 176 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information

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