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1.
Measurement of the ηc(1S)ηc(1S) production cross-section in proton-proton collisions via the decay ηc(1S)pˉpηc(1S)p¯p / LHCb collaboration
The production of the ηc(1S)ηc(1S) state in proton-proton collisions is probed via its decay to the pˉpp¯p final state with the LHCb detector, in the rapidity range 2.0<y<4.52.0<y<4.5 and in the meson transverse-momentum range pT>6.5pT>6.5 GeV/c. The cross-section for prompt production of ηc(1S)ηc(1S) mesons relative to the prompt J/ψJ/ψ cross-section is measured, for the first time, to be σηc(1S)/σJ/ψ=1.74±0.29±0.28±0.18Bσηc(1S)/σJ/ψ=1.74±0.29±0.28±0.18B at a centre-of-mass energy s=7s=7 TeV using data corresponding to an integrated luminosity of 0.7 fb11, and σηc(1S)/σJ/ψ=1.60±0.29±0.25±0.17Bσηc(1S)/σJ/ψ=1.60±0.29±0.25±0.17B at s=8s=8 TeV using 2.0 fb11. [...]
arXiv:1409.3612; LHCB-PAPER-2014-029; CERN-PH-EP-2014-218; LHCB-PAPER-2014-029; CERN-PH-EP-2014-218.- Geneva : CERN, 2015-07-04 - 20 p. - Published in : Eur. Phys. J. C 75 (2015) 311 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Fulltext from Publisher: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
2.
Measurement of the ηc(1S)ηc(1S) production cross-section in pppp collisions at s=13s=13 TeV / LHCb Collaboration
Using a data sample corresponding to an integrated luminosity of 2.0fb12.0fb1, collected by the LHCb experiment, the production of the ηc(1S)ηc(1S) state in proton-proton collisions at a centre-of-mass energy of s=13 TeVs=13 TeV is studied in the rapidity range 2.0<y<4.52.0<y<4.5 and in the transverse momentum range 6.5<pT<14.0 GeV6.5<pT<14.0 GeV. The cross-section for prompt production of ηc(1S)ηc(1S) mesons relative to that of the J/ψJ/ψ meson is measured using the pˉpp¯p decay mode and is found to be σηc(1S)/σJ/ψ=1.69±0.15±0.10±0.18σηc(1S)/σJ/ψ=1.69±0.15±0.10±0.18. [...]
arXiv:1911.03326; LHCb-PAPER-2019-024; CERN-EP-2019-214; LHCB-PAPER-2019-024.- 2020-03-02 - 29 p. - Published in : Eur. Phys. J. C 80 (2020) 191 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
3.
Measurements of the branching fractions of B+pˉpK+B+p¯pK+ decays / LHCb Collaboration
The branching fractions of the decay B+pˉpK+B+p¯pK+ for different intermediate states are measured using data, corresponding to an integrated luminosity of 1.0 fb11, collected by the LHCb experiment. The total branching fraction, its charmless component (Mpˉp<2.85(Mp¯p<2.85 GeV/c2)GeV/c2) and the branching fractions via the resonant cˉcc¯c states ηc(1S)ηc(1S) and ψ(2S)ψ(2S) relative to the decay via a J/ψJ/ψ intermediate state are B(B+pˉpK+)totalB(B+J/ψK+pˉpK+)=4.91±0.19(stat)±0.14(syst),B(B+pˉpK+)Mpˉp<2.85GeV/c2B(B+J/ψK+pˉpK+)=2.02±0.10(stat)±0.08(syst),B(B+ηc(1S)K+pˉpK+)B(B+J/ψK+pˉpK+)=0.578±0.035(stat)±0.027(syst),B(B+ψ(2S)K+pˉpK+)B(B+J/ψK+pˉpK+)=0.080±0.012(stat)±0.009(syst). Upper limits on the B+ branching fractions into the ηc(2S) meson and into the charmonium-like states X(3872) and X(3915) are also obtained..
arXiv:1303.7133; LHCB-PAPER-2012-047; CERN-PH-EP-2013-040; LHCB-PAPER-2012-047; CERN-PH-EP-2013-040.- Geneva : CERN, 2013-06-13 - 14 p. - Published in : Eur. Phys. J. C 73 (2013) 2462 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
4.
Exclusive J/ψ and ψ(2S) production in pp collisions at s=7 TeV / LHCb Collaboration
Exclusive J/ψ and ψ(2S) vector meson production has been observed in the dimuon channel using the LHCb detector. The cross-section times branching fractions to two muons with pseudorapidities between 2.0 and 4.5 are measured to be σppJ/ψ(μ+μ)(2.0<ημ±<4.5)=307±21±36 pb, σppψ(2S)(μ+μ)(2.0<ημ±<4.5)=7.8±1.3±1.0 pb, where the first uncertainties are statistical and the second are systematic. [...]
arXiv:1301.7084; CERN-PH-EP-2013-005; LHCB-PAPER-2012-044; CERN-PH-EP-2013-005; LHCB-PAPER-2012-044.- Geneva : CERN, 2013 - 17 p. - Published in : J. Phys. G 40 (2013) 045001 IOP Open Access article: PDF; Related data file(s): ZIP; External link: Preprint
5.
Measurements of B+c production and mass with the B+cJ/ψπ+ decay / LHCb Collaboration
Measurements of B+c production and mass are performed with the decay mode B+cJ/ψπ+ using 0.37 fb1 of data collected in pp collisions at s=7~TeV by the LHCb experiment. The ratio of the production cross-section times branching fraction between the B+cJ/ψπ+ and the B+J/ψK+ decays is measured to be (0.68±0.10(stat.)±0.03(syst.)±0.05(lifetime))% for B+c and B+ mesons with transverse momenta pT>4 GeV/c and pseudorapidities 2.5<η<4.5. [...]
arXiv:1209.5634; LHCB-PAPER-2012-028; CERN-PH-EP-2012-275; LHCB-PAPER-2012-028; CERN-PH-EP-2012-275.- Geneva : CERN, 2012 - 15 p. - Published in : Phys. Rev. Lett. 109 (2012) 232001 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
6.
Measurement of the cross-section for Ze+e production in pp collisions at s=7 TeV / LHCb Collaboration
A measurement of the cross-section for ppZe+e is presented using data at s=7 TeV corresponding to an integrated luminosity of 0.94 fb1. The process is measured within the kinematic acceptance pT>20GeV/c and 2<η<4.5 for the daughter electrons and dielectron invariant mass in the range 60-120 GeV/c2. [...]
arXiv:1212.4620; CERN-PH-EP-2012-363; LHCB-PAPER-2012-036; CERN-PH-EP-2012-363; LHCB-PAPER-2012-036.- Geneva : CERN, 2013 - 22 p. - Published in : JHEP 02 (2013) 106 APS published version, local copy: PDF; Fulltext: arXiv:1212.4620 - PDF; LHCb-PAPER-2012-036 - PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Rivet analyses reference
7.
First observation of the decay B0sϕˉK0 / LHCb collaboration
A first observation of the decay B0sϕˉK0 is reported from an analysis based on a data sample, corresponding to an integrated luminosity of 1.0 fb1 of pp collisions at s=7TeV, collected with the LHCb detector. A yield of 30±6 B0s(KK)(Kπ) candidates is found in the mass windows 1012.5<M(KK)<1026.5MeV/c2 and 746<M(Kπ)<1046MeV/c2, corresponding to a signal significance of 6.1 standard deviations. [...]
arXiv:1306.2239; LHCB-PAPER-2013-012; CERN-PH-EP-2013-087; LHCB-PAPER-2013-012; CERN-PH-EP-2013-087.- Geneva : CERN, 2013-11-12 - 22 p. - Published in : JHEP 11 (2013) 092 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
8.
Precision measurement of D meson mass differences / LHCb Collaboration
Using three- and four-body decays of D mesons produced in semileptonic b-hadron decays, precision measurements of D meson mass differences are made together with a measurement of the D0 mass. The measurements are based on a dataset corresponding to an integrated luminosity of 1.0 fb1 collected in pp collisions at 7~TeV. [...]
arXiv:1304.6865; CERN-PH-EP-2013-053; LHCB-PAPER-2013-011; CERN-PH-EP-2013-053; LHCB-PAPER-2013-011.- Geneva : CERN, 2013 - 18 p. - Published in : JHEP 06 (2013) 065 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
9.
Observation of B+cJ/ψD+s and B+cJ/ψD+s decays / LHCb Collaboration
The decays B+cJ/ψD+s and B+cJ/ψD+s are observed for the first time using a dataset, corresponding to an integrated luminosity of 3fb1, collected by the LHCb experiment in proton-proton collisions at centre-of-mass energies of s=7 and 8 TeV. The statistical significance for both signals is in excess of 9 standard deviations. [...]
arXiv:1304.4530; CERN-PH-EP-2013-051; LHCB-PAPER-2013-010; CERN-PH-EP-2013-051; LHCB-PAPER-2013-010.- Geneva : CERN, 2013-06-28 - 10 p.
- Published in : Phys. Rev. D APS Open Access article: PDF; Fulltext: PDF; Publisher’s Note: PDF; Related data file(s): ZIP; External link: Preprint
10.
Measurement of CP asymmetries in D±ηπ± and D±sηπ± decays / LHCb Collaboration
A search for CP violation in D±ηπ± and D±sηπ± decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 3 fb1, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The measured CP-violating charge asymmetries are ACP(D±ηπ±)=(0.61±0.72±0.53±0.12)% and ACP(D±sηπ±)=(0.82±0.36±0.22±0.27)%, where the first uncertainties are statistical, the second systematic, and the third are the uncertainties on the ACP(D±K0Sπ±) and ACP(D±sϕπ±) measurements used for calibration. [...]
arXiv:1701.01871; LHCB-PAPER-2016-041; CERN-EP-2016-315.- Geneva : CERN, 2017-08-10 - 10 p. - Published in : Phys. Lett. B 771 (2017) 21-30 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information

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