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 - 22 p.
- Published in : Phys. Rev. D 111 (2025) 092008
Fulltext: PaperToArXiv - PDF; 2503.02711 - PDF 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 - 14 p.
- Published in : Phys. Rev. D 111 (2025) L091102
Fulltext: LHCb-PAPER-2024-051 - PDF; LHCb-PAPER-2024-051-supplementary - ZIP; 2502.04013 - PDF; Related data file(s): 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: lhcb-paper-2024-044-arxiv - PDF; 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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2024-12-13
15:13 |
Search for $D^0$ meson decays to $\pi^+ \pi^- e^+ e^-$ and $K^+ K^- e^+ e^-$ final states
/ LHCb Collaboration
A search for $D^0$ meson decays to the $\pi^+\pi^-e^+e^-$ and $K^+K^-e^+e^-$ final states is reported using a sample of proton-proton collisions collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6 fb$^{-1}$. The decay $D^0 \rightarrow \pi^+\pi^-e^+e^-$ is observed for the first time when requiring that the two electrons are consistent with coming from the decay of a $\phi$ or $\rho^0/\omega$ meson. [...]
arXiv:2412.09414; LHCb-PAPER-2024-047; CERN-EP-2024-307; LHCB-PAPER-2024-047.-
Geneva : CERN, 2025-05-01 - 21 p.
- Published in : Phys. Rev. D 111 (2025) L091101
Fulltext: 2412.09414 - PDF; LHCb-PAPER-2024-047 - PDF; publication - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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2024-12-06
08:52 |
Observation of the open-charm tetraquark state $T_{cs 0}^{*}(2870)^0$ in the $B^- \rightarrow D^- D^0 K_\mathrm{S}^0$ decay
/ Aaij, Roel (Nikhef, Amsterdam) ; Abdelmotteleb, Ahmed Sameh Wagih (Warwick U.) ; Abellan Beteta, Carlos (Zurich U.) ; Abudinén, Fernando Jesus (Warwick U.) ; Ackernley, Thomas (Liverpool U.) ; Adefisoye, A.A. (Syracuse U.) ; Adefisoye, Ayomide Matthew (Syracuse U.) ; Adeva, Bernardo (U. Santiago de Compostela (main)) ; Adinolfi, Marco (Bristol U.) ; Adlarson, Patrik Harri (Uppsala U.) et al.
An amplitude analysis of $B^-\rightarrow D^- D^0 K_\mathrm{S}^0$ decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 9 fb$^{-1}$, collected with the LHCb detector at center-of-mass energies of 7, 8, and 13$\mathrm{\,Te\kern -0.1em V}$. A resonant structure of spin-parity $0^+$ is observed in the $D^0 K_\mathrm{S}^0$ invariant-mass spectrum with a significance of $5.3\,\sigma$. [...]
arXiv:2411.19781; LHCb-PAPER-2024-040; CERN-EP-2024-287; LHCB-PAPER-2024-040.-
Geneva : CERN, 2025-03-11 - 21 p.
- Published in : Phys. Rev. Lett. 134 (2025) 101901
Fulltext: LHCb-PAPER-2024-040 - PDF; 2411.19781 - PDF; Related data file(s): ZIP; Supplementary information: ZIP; publication: PDF;
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2024-11-20
08:50 |
Measurement of $\phi(1020)$ meson production in fixed-target $\textit{p}$Ne collisions at~$\sqrt{s_{NN}}$~=~68.5 GeV.
/ LHCb Collaboration
The first measurement of $\phi(1020)$ meson production in fixed-target $p$Ne collisions at $\sqrt{s_{NN}}=68.5$ GeV is presented. The $\phi(1020)$ mesons are reconstructed in their $K^{+}K^{-}$ decay in a data sample consisting of proton collisions on neon nuclei at rest, corresponding to an integrated luminosity of $21.7 \pm 1.4$ nb$^{-1}$, collected by the LHCb detector at CERN. [...]
arXiv:2411.09343; LHCb-PAPER-2024-036; CERN-EP-2024-274; LHCB-PAPER-2024-036.-
Geneva : CERN, 2025-03-19 - 20 p.
- Published in : JHEP 2503 (2025) 151
Fulltext: LHCB_PAPER_2024_036 - PDF; 2411.09343 - PDF; LHCb_PAPER_2024_036-Supplementary - ZIP; document - PDF; Related data file(s): ZIP;
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