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Measurement of the $\Omega_c^0$ and $\Xi_c^0$ baryon lifetimes using hadronic $b$-baryon decays / LHCb Collaboration
The lifetimes of the $\Omega_c^0$ and $\Xi_c^0$ baryons are measured using a $pp$ collision dataset collected by the LHCb experiment, corresponding to an integrated luminosity of $9~\rm{fb^{-1}}$. [...]
arXiv:2506.13334 ; LHCb-PAPER-2025-013,CERN-EP-2025-117 ; LHCb-PAPER-2025-013 ; CERN-EP-2025-117 ; LHCB-PAPER-2025-013. - 2025-06-16 - 25.
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Search for the $B^+_c\rightarrow \chi_{c1}(3872)\pi^+$ decay / LHCb Collaboration
A search for the decay $B^+_c\rightarrow \chi_{c1}(3872)\pi^+$ is reported using proton-proton collision data collected with the LHCb detector between 2011 and 2018 at centre-of-mass energies of 7, 8, and 13 $TeV$, corresponding to an integrated luminosity of $9fb^{-1}$. [...]
arXiv:2503.20039 ; CERN-EP-2025-042 ; LHCb-PAPER-2024-050 ; LHCB-PAPER-2024-050. - 2025 - 29.
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Observation of charge-parity symmetry breaking in baryon decays / LHCb Collaboration
The Standard Model of particle physics-the theory of particles and interactions at the smallest scale-predicts that matter and antimatter interact differently due to violation of the combined symmetry of charge conjugation ($C$) and parity ($P$). Charge conjugation transforms particles into their antimatter particles, whereas the parity transformation inverts spatial coordinates. [...]
arXiv:2503.16954; LHCb-PAPER-2024-054; CERN-EP-2025-031; LHCB-PAPER-2024-054.- Geneva : CERN, 2025-07-16 - 6 p. - Published in : Nature 643 (2025) 1223-1228 Fulltext: LHCb-PAPER-2024-054-supplementary - ZIP; 2503.16954 - PDF; document - PDF; LHCb-PAPER-2024-054 - PDF; Related data file(s): ZIP; External links: Interactions.org; Interactions.org

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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: PaperToArXiv - PDF; 2503.02711 - PDF PDF; PhysRevD.111.092008 - PDF; Related data file(s): ZIP;

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Observation of a new charmed baryon decaying to $\Xi_c^+ \pi^+ \pi^-$ / LHCb Collaboration
The $\Xi^+_c\pi^-\pi^+$ spectrum is investigated using proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb$^{-1}$, collected by the LHCb experiment during 2016-2018. [...]
arXiv:2502.18987 ; LHCb-PAPER-2024-055 ; CERN-EP-2025-019 ; LHCB-PAPER-2024-055. - 2025 - 22.
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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: 2502.10291v1 - PDF; 2502.10291 - PDF; document - PDF; LHCb-PAPER-2024-022-figures-JHEP - ZIP;

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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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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 - PDF; LHCb-PAPER-2024-051-supplementary - ZIP; 2502.04013 - PDF; publication - PDF; Related data file(s): ZIP;

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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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Observation of the $\Lambda_{b}^{0} \to J/\psi\Xi^{-} K^+$ and $\Xi_{b}^{0} \to J/\psi\Xi^{-} \pi^+$ decays / LHCb Collaboration
The first observation of the $\Xi_b^0 \to J/\psi \Xi^- \pi^+$ decay and the most precise measurement of the branching fraction of the $\Lambda_b^0 \to J/\psi \Xi^- K^+$ decay are reported, using proton-proton collision data from the LHCb experiment collected in 2016--2018 at a centre-of-mass energy of 13~TeV, corresponding to an integrated luminosity of 5.4~fb$^{-1}$. Using the $\Lambda_b^0 \to J/\psi \Lambda$ and $\Xi_b^0 \to J/\psi \Xi^-$ decays as normalisation channels, the ratios of branching fractions are measured to be: \[ \frac{\mathcal{B}(\Lambda_b^0 \to J/\psi \Xi^- K^+)}{\mathcal{B}(\Lambda_b^0 \to J/\psi \Lambda)} = (1.17 \pm 0.14 \pm 0.08)\times 10^{-2} \, , \] \[ \frac{\mathcal{B}(\Xi_b^0 \to J/\psi \Xi^- \pi^+)}{\mathcal{B}(\Xi_b^0 \to J/\psi \Xi^-)} = (11.9 \pm 1.4 \pm 0.6)\times 10^{-2}\, , \] where the first uncertainty is statistical and the second systematic..
arXiv:2501.12779; CERN-EP-2024-337 LHCb-PAPER-2024-049; CERN-EP-2024-337; LHCb-PAPER-2024-049; LHCB-PAPER-2024-049.- Geneva : CERN, 2025-07-28 - 15 p. - Published in : Eur. Phys. J. C 85 (2025) 812 Fulltext: LHCb-PAPER-2024-049 - PDF; 2501.12779 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Se også: lignende forfatternavn
3	Alexander, M H
1	Alexander, M J
1	Alexander, M R
1	Alexander, M T
137	Alexander, M.
2	Alexander, Magazinov
2	Alexander, Mark
715	Alexander, Michael
9	Alexander, Michael J
15	Alexander, Michael Thomas
1	Alexander, Mike
3	Alexander, Millard H
2	Alexander, Murray E

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