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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 - 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: LHCb_PAPER_2024_038 - PDF; 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 - 23 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.- Geneva : CERN, 2025-05-01 - 46 p. - Published in : Phys. Rev. D 111 (2025) 092009 Fulltext: LHCb-PAPER-2024-045 - PDF; 2501.06483 - 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

Test of lepton flavour universality with $B^+ \to K^+\pi^+\pi^-\ell^+\ell^-$ decays / LHCb Collaboration
The first test of lepton flavour universality between muons and electrons using

$B^+ \to K^+\pi^+\pi^-\ell^+\ell^-$ (

$\ell=e,\mu$ ) decays is presented. The measurement is performed with data from proton-proton collisions collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of

$9~\mathrm{fb}^{-1}$ . [...]
arXiv:2412.11645; LHCb-PAPER-2024-046; CERN-EP-2024-312; LHCB-PAPER-2024-046.- Geneva : CERN, 2025-05-09 - 13 p. - Published in : Phys. Rev. Lett. 134 (2025) 181803 Fulltext: LHCb-PAPER-2024-046 - PDF; 2412.11645 - PDF; publication - PDF; Related data file(s): ZIP; External link: Supplementary information

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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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