2024-10-04 10:45 |
Measurement of the effective leptonic weak mixing angle
/ LHCb Collaboration
Using pppp collision data at √s=13√s=13~TeV, recorded by the LHCb experiment between 2016 and 2018 and corresponding to an integrated luminosity of 5.45.4~fb−1−1, the forward-backward asymmetry in the pp→Z/γ∗→μ+μ−pp→Z/γ∗→μ+μ− process is measured. The measurement is carried out in ten intervals of the difference between the muon pseudorapidities, within a fiducial region covering dimuon masses between 6666 and 116116 GeV, muon pseudorapidities between 2.02.0 and 4.54.5 and muon transverse momenta above 2020 GeV. [...]
arXiv:2410.02502; LHCb-PAPER-2024-028; CERN-EP-2024-230.-
Geneva : CERN, 2024-12-03 - 28 p.
- Published in : JHEP 2412 (2024) 026
Fulltext: 2410.02502 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: LHCb-PAPER-2024-028-supplementary - ZIP; supplementary (3) - PDF;
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2024-09-27 11:23 |
Search for B∗0(s)→μ+μ−B∗0(s)→μ+μ− in B+c→π+μ+μ−B+c→π+μ+μ− decays
/ LHCb Collaboration
A search for the very rare B∗0→μ+μ−B∗0→μ+μ− and B∗0s→μ+μ−B∗0s→μ+μ− decays is conducted by analysing the B+c→π+μ+μ−B+c→π+μ+μ− process. The analysis uses proton-proton collision data collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb−1fb−1 [...]
arXiv:2409.17209; CERN-EP-2024-220; LHCb-PAPER-2024-026.-
Geneva : CERN, 2025-01-13 - 16 p.
- Published in : Eur. Phys. J. C 85 (2025) 20
Figures: ZIP; Fulltext: 2409.17209 - PDF; document - PDF;
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2024-09-20 11:34 |
Analysis of Λ0b→pK−μ+μ−Λ0b→pK−μ+μ− decays
/ LHCb Collaboration
The differential branching fraction and angular coefficients of Λ0b→pK−μ+μ−Λ0b→pK−μ+μ− decays are measured in bins of the dimuon mass squared and dihadron mass. The analysis is performed using a data set corresponding to 9fb−1fb−1 of integrated luminosity collected with the LHCbLHCb detector between 2011 and 2018. [...]
arXiv:2409.12629; CERN-EP-2024-212; LHCb-PAPER-2024-024.-
Geneva : CERN, 2024-12-19 - 33 p.
- Published in : JHEP 2412 (2024) 147
Fulltext: 2409.12629 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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2024-09-06 14:06 |
Measurement of CPCP violation in B0→D+D−B0→D+D− and B0s→D+sD−sB0s→D+sD−s decaysMeasurement of CP violation in B00→ D++D−− and B0sB0s→D+sD−sD+sD−s decays
/ LHCb Collaboration
A time-dependent, flavour-tagged measurement of CPCP violation is performed with B0→D+D−B0→D+D− and B0s→D+sD−sB0s→D+sD−s decays, using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 6 fb−1−1. In B0→D+D−B0→D+D− decays the CPCP-violation parameters are measured to be \begin{align} S_{D^{+}D^{-}} & = -0.552 \pm 0.100\text{(stat)} \pm 0.010\text{(syst)}, \nonumber \newline C_{D^{+}D^{-}} & = \phantom{-}0.128 \pm0.103\text{(stat)} \pm 0.010\text{(syst)}. [...]
arXiv:2409.03009; LHCb-PAPER-2024-027; CERN-EP-2024-217; LHCB-PAPER-2024-027.-
Geneva : CERN, 2025-01-09 - 26 p.
- Published in : JHEP 2501 (2025) 061
Fulltext: 2409.03009 - PDF; document - PDF; Related data file(s): ZIP;
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2024-09-06 12:25 |
Measurement of Λ0bΛ0b, Λ+cΛ+c and ΛΛ decay parameters using Λ0b→Λ+ch−Λ0b→Λ+ch− decays
/ LHCb Collaboration
A comprehensive study of the angular distributions in the bottom-baryon decays Λ0b→Λ+ch−(h=π,K)Λ0b→Λ+ch−(h=π,K), followed by Λ+c→Λh+Λ+c→Λh+ with Λ→pπ−Λ→pπ− or Λ+c→pK0SΛ+c→pK0S decays, is performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of 9 fb−1fb−1 collected by the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeVTeV. The decay parameters and the associated charge-parity (CPCP) asymmetries are measured, with no significant CPCP violation observed. [...]
arXiv:2409.02759; LHCb-PAPER-2024-017; CERN-EP-2024-200.-
Geneva : CERN, 2024-12-30 - 15 p.
- Published in : Phys. Rev. Lett. 133 (2024) 261804
Fulltext: 2409.02759 - PDF; Publication - PDF; Related data file(s): ZIP;
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2024-09-06 09:49 |
Measurement of CPCP violation observables in D+→K−K+π+D+→K−K+π+ decays
/ LHCb Collaboration
A search for violation of the charge-parity (CPCP) symmetry in the D+→K−K+π+D+→K−K+π+ decay is presented, with proton-proton collision data corresponding to an integrated luminosity of 5.4 fb−1−1, collected at a center-of-mass energy of 13 TeV with the LHCb detector. A novel model-independent technique is used to compare the D+D+ and D−D− phase-space distributions, with instrumental asymmetries subtracted using the D+s→K−K+π+D+s→K−K+π+ decay as a control channel. [...]
arXiv:2409.01414; CERN-EP-2024-204; LHCb-PAPER-2024-019.-
Geneva : CERN, 2024-12-16 - 13 p.
- Published in : Phys. Rev. Lett. 133 (2024) 251801
Fulltext: 2409.01414 - PDF; Publication - PDF; Related data file(s): ZIP;
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2024-08-30 08:53 |
Study of the rare decay J/ψ→μ+μ−μ+μ−J/ψ→μ+μ−μ+μ−
/ LHCb Collaboration
The rare electromagnetic J/ψ→μ+μ−μ+μ−J/ψ→μ+μ−μ+μ− decay is observed with a significance greatly exceeding the discovery threshold, using proton-proton collision data collected by the LHCb experiment during 2016--2018 at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4fb−15.4fb−1. The rate of this decay is measured relative to that of the J/ψ→μ+μ−J/ψ→μ+μ− mode. [...]
arXiv:2408.16646; LHCb-PAPER-2024-016; CERN-EP-2024-201; LHCB-PAPER-2024-016.-
Geneva : CERN, 2024-12-10 - 26 p.
- Published in : JHEP 2412 (2024) 062
Fulltext: 2408.16646 - PDF; document - PDF; Related data file(s): ZIP;
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2024-08-12 13:51 |
Observation of muonic Dalitz decays of χbχb mesons and precise spectroscopy of hidden-beauty states
/ LHCb Collaboration
The decays of the χb1(1P)χb1(1P), χb2(1P)χb2(1P), χb1(2P)χb1(2P) and χb2(2P)χb2(2P) mesons into the Υ(1S)μ+μ−Υ(1S)μ+μ− final state are observed with a high significance using proton-proton collision data collected with the LHCb detector and corresponding to an integrated luminosity of 9fb−1−1. The newly observed decays together with the Υ(2S)→Υ(1S)π+π−Υ(2S)→Υ(1S)π+π− and Υ(3S)→Υ(2S)π+π−Υ(3S)→Υ(2S)π+π− decay modes are used for precision measurements of the mass and mass splittings for the hidden-beauty states..
arXiv:2408.05134; LHCb-PAPER-2024-025; CERN-EP-2024-207.-
Geneva : CERN, 2024-10-16 - 29 p.
- Published in : JHEP 2410 (2024) 122
Fulltext: 2408.05134 - PDF; Publication - PDF; Related data file(s): ZIP;
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2024-07-26 15:46 |
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2024-07-22 14:26 |
Study of charmonium production via the decay to pˉp at √s=13TeV
/ LHCb Collaboration
Charmonium production cross-section in proton-proton collisions is measured at the centre-of-mass energy √s=13TeV using decays to pˉp final state. The study is performed using a data sample corresponding to an integrated luminosity of 2.2fb−1 collected in 2018 with the LHCb detector. [...]
arXiv:2407.14261; LHCb-PAPER-2024-004; CERN-EP-2024-165; LHCB-PAPER-2024-004.-
Geneva : CERN, 2024-12-09 - 32 p.
- Published in : Eur. Phys. J. C 84 (2024) 1274
Fulltext: 2407.14261 - PDF; document - PDF; Related data file(s): ZIP;
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