2025-04-30
10:10 |
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2025-03-11
08:43 |
Branching fraction measurement of the decay $B^+ \to \psi(2S) \phi(1020) K^+$
/ LHCb Collaboration
The branching fraction of the decay $B^+\to \psi(2S)\phi(1020)K^+$, relative to the topologically similar decay $B^+\to J/\psi \phi(1020) K^+$, is measured using proton-proton collision data collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of $9\,\mathrm{fb}^{-1}$. The ratio is found to be $0.061 \pm 0.004 \pm 0.009$, where the first uncertainty is statistical and the second systematic. [...]
arXiv:2503.02711; LHCb-PAPER-2024-039; CERN-EP-2025-011.-
Geneva : CERN, 2025-05-01 - 15 p.
- Published in : Phys. Rev. D 111 (2025) 092008
Fulltext: 2503.02711 - PDF PDF; PhysRevD.111.092008 - PDF; Related data file(s): ZIP;
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2025-02-17
10:35 |
Angular analysis of $B^0 \to K^{*0} e^+e^-$ decays
/ LHCb Collaboration
An angular analysis of $B^0\rightarrow K^{*0}e^{+}e^{-}$ decays is presented using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb$^{-1}$. The analysis is performed in the region of the dilepton invariant mass squared of 1.1-6.0 GeV$^{2}/c^{4}$. [...]
arXiv:2502.10291; LHCb-PAPER-2024-022; CERN-EP-2025-001.-
Geneva : CERN, 2025-06-13 - 61 p.
- Published in : JHEP 2506 (2025) 140
Fulltext: 2502.10291 - PDF; document - PDF; Related data file(s): ZIP;
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2025-02-10
10:32 |
Measurement of the multiplicity dependence of $\mitΥ$ production ratios in $pp$ collisions at $\sqrt{s}=13$ TeV
/ LHCb Collaboration
The $\mit{\Upsilon}(\mathrm{2}S)$ and $\mit{\Upsilon}(\mathrm{3}S)$ production cross-sections are measured relative to that of the $\mit{\Upsilon}(\mathrm{1}S)$ meson, as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy of $13$ TeV. The measurement uses data collected by the LHCb experiment in 2018 corresponding to an integrated luminosity of 2 $\text{fb}^{-1}$. [...]
arXiv:2501.12611; LHCb-PAPER-2024-038; CERN-EP-2024-318; LHCB-PAPER-2024-038.-
Geneva : CERN, 2025-05-02 - 25 p.
- Published in : JHEP 2505 (2025) 011
Fulltext: 2501.12611 - PDF; document - PDF; Related data file(s): ZIP;
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2025-02-06
13:46 |
Search for resonance-enhanced $CP$ and angular asymmetries in the $\Lambda^+_c\to p\mu^+\mu^-$ decay at LHCb
/ LHCb Collaboration
The first measurement of the $CP$ asymmetry of the decay rate ($A_{CP}$) and the $CP$ average ($\Sigma A_{\text{FB}}$) and $CP$ asymmetry ($\Delta A_{\text{FB}}$) of the forward-backward asymmetry in the muon system of $\mathit{\Lambda}^+_c\to p\mu^+\mu^-$ decays is reported. The measurement is performed using a data sample of proton-proton collisions, recorded by the LHCb experiment from 2016 to 2018 at a center-of-mass energy of 13$\text{ TeV}$, which corresponds to an integrated luminosity of 5.4$\text{ fb}^{-1}$. [...]
arXiv:2502.04013; LHCb-PAPER-2024-051; CERN-EP-2024-340; LHCB-PAPER-2024-051.-
Geneva : CERN, 2025-05-01 - 14 p.
- Published in : Phys. Rev. D 111 (2025) L091102
Fulltext: LHCb-PAPER-2024-051-supplementary - ZIP; 2502.04013 - PDF; publication - PDF; Related data file(s): ZIP;
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2025-01-28
14:01 |
Evidence for $B^-\rightarrow D^{**0}\tau^-\overline{\nu}_{\tau}$ decays
/ LHCb Collaboration
The first evidence for the decay $B^-\rightarrow D^{**0}\tau^-\overline{\nu}_{\tau}$ is obtained using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb$^{-1}$ , at centre-of-mass energies of 7, 8 and 13 Tev. Here, the $D^{**0}$ meson represents any of the three excited charm mesons $D_{1}(2420)^{0}$, $D_{2}^{*}(2460)^{0}$, and $D_{1}^{'}(2400)^{0}$. [...]
arXiv:2501.14943; LHCb-PAPER-2024-037; CERN-EP-2024-341; LHCB-PAPER-2024-037.-
Geneva : CERN, 2025-07-08 - 15 p.
- Published in : Phys. Rev. Lett. 135 (2025) 021802
Fulltext: 2501.14943v1 - PDF; 2501.14943 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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2025-01-22
11:44 |
Search for charge-parity violation in semileptonically tagged $D^{0} \to K^{+} \pi^{-}$ decays
/ LHCb Collaboration
An analysis of the flavour oscillations of the charmed neutral meson is presented. The ratio of ${D^{0} \to K^{+} \pi^{-}}$ and ${D^{0} \to K^{-} \pi^{+}}$ decay rates is measured as a function of the decay time of the $D^{0}$ meson and compared with the charge-conjugated system to search for charge-parity violation. [...]
arXiv:2501.11635; LHCb-PAPER-2024-044; CERN-EP-2024-319; LHCB-PAPER-2024-044.-
Geneva : CERN, 2025-03-19 - 29 p.
- Published in : JHEP 2503 (2025) 149
Fulltext: 2501.11635 - PDF; document - PDF; Related data file(s): ZIP;
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2025-01-14
10:32 |
Study of light-meson resonances decaying to $K^0_{\rm S} K \pi$ in the $B \to (K^0_{\rm S} K \pi) K$ channels
/ LHCb Collaboration
A study is presented of $B^+ \to K^0_{\rm S} K^- \pi^+ K^-$ and $B^+ \to K^0_{\rm S} K^+ \pi^- K^+$ decays based on the analysis of proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of $9 fb^{-1}$. The $K^0_{\rm S} K \pi$ invariant-mass distributions of both $B^+$ decay modes show, in the $m(K^0_{\rm S} K \pi)<1.85$ GeV mass region, a rich spectrum of light-meson resonances, resolved using an amplitude analysis. [...]
arXiv:2501.06483; LHCb-PAPER-2024-045; CERN-EP-2024-329; LHCb-PAPER-2024-045,CERN-EP-2024-329; LHCB-PAPER-2024-045.-
Geneva : CERN, 2025-05-01 - 32 p.
- Published in : Phys. Rev. D 111 (2025) 092009
Fulltext: 2501.06483 - PDF; Updated list of figures - ZIP; publication - PDF; Publication: PDF; Related data file(s): ZIP;
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2024-12-19
09:00 |
Measurement of $C\!P$ asymmetries in $\Lambda_b^0\to ph^-$ decays
/ LHCb Collaboration
A search for $CP$ violation in $\Lambda_b^0\rightarrow pK^-$ and $\Lambda_b^0\rightarrow p\pi^-$ decays is presented using the full Run 1 and Run 2 data samples of $pp$ collisions collected with the LHCb detector, corresponding to an integrated luminosity of 9 $\mathrm{fb}^{-1}$ at center-of-mass energies of 7, 8, and 13 TeV. For the Run 2 data sample, the $CP$-violating asymmetries are measured to be $A_{CP}^{pK^-} = (-1.4 \pm 0.7 \pm 0.4)\%$ and $A_{CP}^{p\pi^-} = (0.4 \pm 0.9 \pm 0.4)\%$, where the first uncertainty is statistical and the second is systematic. [...]
arXiv:2412.13958; LHCb-PAPER-2024-048; CERN-EP-2024-330.-
Geneva : CERN, 2025-05-01 - 15 p.
- Published in : Phys. Rev. D 111 (2025) 092004
Fulltext: LHCb-PAPER-2024-048 - PDF; 2412.13958 - PDF; LHCb-PAPER-2024-048-supplementary - ZIP; publication - PDF; Related data file(s): ZIP; External link: Supplementary information
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2024-12-16
15:28 |
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