CERN Accelerating science

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1.
Updated measurement of time-dependent CP-violating observables in B0sJ/ψK+KB0sJ/ψK+K decays / LHCb Collaboration
The decay-time-dependent {\it CP} asymmetry in B0sJ/ψK+K decays is measured using proton-proton collision data, corresponding to an integrated luminosity of 1.9fb1, collected with the LHCb detector at a centre-of-mass energy of 13TeV in 2015 and 2016. Using a sample of approximately 117\,000 signal decays with an invariant K+K mass in the vicinity of the ϕ(1020) resonance, the {\it CP}-violating phase ϕs is measured, along with the difference in decay widths of the light and heavy mass eigenstates of the B0s-¯B0s system, ΔΓs. [...]
arXiv:1906.08356; LHCb-PAPER-2019-013; CERN-EP-2019-108; LHCB-PAPER-2019-013.- Geneva : CERN, 2019-08-22 - 42 p. - Published in : Eur. Phys. J. C Article from SCOAP3: PDF; Erratum: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
2.
Differential branching fraction and angular analysis of the decay B0sϕμ+μ / LHCb Collaboration
The determination of the differential branching fraction and the first angular analysis of the decay B0sϕμ+μ are presented using data, corresponding to an integrated luminosity of 1.0fb1, collected by the LHCb experiment at s=7TeV. The differential branching fraction is determined in bins of q2, the invariant dimuon mass squared. [...]
arXiv:1305.2168; CERN-PH-EP-2013-078; LHCB-PAPER-2013-017; CERN-PH-EP-2013-078; LHCB-PAPER-2013-017.- Geneva : CERN, 2013-07-11 - 18 p. - Published in : JHEP 07 (2013) 084 APS published version, local copy: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
3.
Measurement of the forward energy flow in pp collisions at s= 7 TeV / LHCb Collaboration
The energy flow created in pp collisions at s=7 TeV is studied within the pseudorapidity range 1.9<eta<4.9 with data collected by the LHCb experiment. The measurements are performed for inclusive minimum-bias interactions, hard scattering processes and events with an enhanced or suppressed diffractive contribution. [...]
arXiv:1212.4755; CERN-PH-EP-2012-346; LHCB-PAPER-2012-034; CERN-PH-EP-2012-346; LHCB-PAPER-2012-034.- Geneva : CERN, 2013 - 17 p. - Published in : Eur. Phys. J. C 73 (2013) 2421 APS published version, local copy: PDF; Fulltext: PDF; Related data (files): ZIP; Springer Open Access article: PDF; External link: Rivet analyses reference
4.
Study of DJ meson decays to D+π, D0π+ and D+π final states in pp collisions / LHCb collaboration
A study of D+π, D0π+ and D+π final states is performed using pp collision data, corresponding to an integrated luminosity of 1.0 fb1, collected at a centre-of-mass energy of 7 TeV with the LHCb detector. The D1(2420)0 resonance is observed in the D+π final state and the D2(2460) resonance is observed in the D+π, D0π+ and D+π final states. [...]
arXiv:1307.4556; CERN-PH-EP-2013-122; LHCB-PAPER-2013-026; CERN-PH-EP-2013-122; LHCB-PAPER-2013-026.- Geneva : CERN, 2013 - 26 p. - Published in : JHEP 09 (2013) 145 APS published version, local copy: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Rivet analyses reference
5.
Production of J/ψ and Υ mesons in pp collisions at s = 8 TeV / LHCb Collaboration
The production of J/ψ and Υ mesons in pp collisions at s = 8 TeV is studied with the LHCb detector. The J/ψ and Υ mesons are reconstructed in the μ+μ decay mode and the signal yields are determined to fit to the μ+μ invariant mass distributions. [...]
arXiv:1304.6977; CERN-PH-EP-2013-071; LHCB-PAPER-2013-016; CERN-PH-EP-2013-071; LHCB-PAPER-2013-016.- Geneva : CERN, 2013-06 - 35 p. - Published in : JHEP 06 (2013) 064 APS published version, local copy: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
6.
Measurement of the branching fractions of the decays B0s¯D0Kπ+ and B0¯D0K+π / LHCb Collaboration
The first observation of the decay B0s¯D0Kπ+ is reported. The analysis is based on a data sample, corresponding to an integrated luminosity of 1.0fb1 of pp collisions, collected with the LHCb detector [...]
arXiv:1304.6317; LHCB-PAPER-2013-022; CERN-PH-EP-2013-070; LHCB-PAPER-2013-022; CERN-PH-EP-2013-070.- Geneva : CERN, 2013-06-20 - 10 p. - Published in : Phys. Rev. D 87 (2013) 112009 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
7.
First observation of CP violation in the decays of B0s mesons / LHCb Collaboration
Using pp collision data corresponding to an integrated luminosity of 1.0fb1 and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct CP violation in B0sKπ+ decays, ACP(B0sKπ+)=0.27±0.04(stat)±0.01(syst), with significance exceeding 5 standard deviations. This is the first observation of CP violation in the decays of B0s mesons. [...]
arXiv:1304.6173; CERN-PH-EP-2013-068; LHCB-PAPER-2013-018; CERN-PH-EP-2013-068; LHCB-PAPER-2013-018.- Geneva : CERN, 2013-05-30 - 9 p. - Published in : Phys. Rev. Lett. 110 (2013) 221601 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External links: Interactions.org article; Physics Synopsis
8.
Searches for violation of lepton flavour and baryon number in tau lepton decays at LHCb / LHCb Collaboration
Searches for the lepton flavour violating decay τμμ+μ and the lepton flavour and baryon number violating decays τˉpμ+μ and τpμμ have been carried out using proton-proton collision data, corresponding to an integrated luminosity of 1.0 fb1, taken by the LHCb experiment at s=7 TeV. No evidence has been found for any signal, and limits have been set at 90% confidence level on the branching fractions: B(τμμ+μ)<8.0×108, B(τˉpμ+μ)<3.3×107 and B(τpμμ)<4.4×107. [...]
arXiv:1304.4518; LHCB-PAPER-2013-014; CERN-PH-EP-2013-062; LHCB-PAPER-2013-014; CERN-PH-EP-2013-062.- Geneva : CERN, 2013-07-09 - 10 p. - Published in : Phys. Lett. B 724 (2013) 36-45 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint
9.
Measurement of the effective B0sJ/ψK0S lifetime / LHCb Collaboration
This paper reports the first measurement of the effective B0sJ/ψK0S lifetime and an updated measurement of its time-integrated branching fraction. Both measurements are performed with a data sample, corresponding to an integrated luminosity of 1.0fb1 of pp collisions, recorded by the LHCb experiment in 2011 at a centre-of-mass energy of 7TeV. [...]
arXiv:1304.4500; CERN-PH-EP-2013-063; LHCB-PAPER-2013-015; CERN-PH-EP-2013-063; LHCB-PAPER-2013-015.- Geneva : CERN, 2013-08-11 - 21 p. - Published in : Nucl. Phys. B 873 (2013) 275-292 APS published version, local copy: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
10.
First observation of the decay B+cJ/ψK+ / LHCb collaboration
The decay B+cJ/ψK+ is observed for the first time using a data sample, corresponding to an integrated luminosity of 1.0 fb1, collected by the LHCb experiment in pp collisions at a centre-of-mass energy of 7 TeV. A yield of 46±12 events is reported, with a significance of 5.0 standard deviations. [...]
arXiv:1306.6723; CERN-PH-EP-2013-106; LHCB-PAPER-2013-021; CERN-PH-EP-2013-106; LHCB-PAPER-2013-021.- Geneva : CERN, 2013 - 14 p. - Published in : JHEP 09 (2013) 075 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

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