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LHCb Papers

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2025-08-20
09:20
First observation of $C\!P$ violation and measurement of polarisation in $B^+ \to \rho(770)^0 K^*(892)^+$ decays
An amplitude analysis of the $B^+\to(\pi^+\pi^-)(K^0_{\mathrm{S}}\pi^+)$ decay is performed in the mass regions $0.30 < m_{\pi^+\pi^-} < 1.10\,\mathrm{GeV}/c^2$ and $0.75 < m_{K^0_{\mathrm{S}}\pi^+} < 1.20\,\mathrm{GeV}/c^2$, using $pp$ collision data recorded with the LHCb detector corresponding to an integrated luminosity of $9\,\mathrm{fb}^{-1}$. [...]
CERN-EP-2025-171 ; arXiv:2508.13563 ; LHCB-PAPER-2025-026. - 2025
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2025-08-04
15:07
Amplitude analysis of the $\Xi^+_c\to pK^-\pi^+$ decay and $\Xi^+_c$ baryon polarization measurement in semileptonic beauty-hadron decays / LHCb Collaboration
An amplitude analysis of the $\Xi^+_c\to pK^-\pi^+$ decay together with a measurement of the $\Xi^+_c$ polarization vector in semileptonic beauty-hadron decays is presented. [...]
arXiv:2508.00492 ; LHCb-PAPER-2024-034 ; CERN-EP-2024-320. - 2025 - 38.
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2025-07-21
13:54
Improved measurement of $\eta / \eta^{\prime}$ mixing in $B^{0}_{(s)} \rightarrow J/\psi \eta^{(\prime)}$ decays / LHCb Collaboration
Branching fraction ratios between the decays $B^{0}_{(s)} \rightarrow J/\psi \eta^{(\prime)}$ are measured 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$^{-1}$. [...]
arXiv:2507.13914 ; LHCb-PAPER-2025-025 ; CERN-EP-2025-148 ; LHCB-PAPER-2025-025. - 2025-07-18 - 32.
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2025-07-21
09:53
Measurement of the $\ B^0 \to \rho(770)^0 \gamma \ $ branching fraction / LHCb Collaboration
The ratio between the branching fractions of the $B^0\to\rho(770)^0\gamma$ and $B^0\to K^{*}(892)^0\gamma$ decays is measured with 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${}^{-1}$. [...]
arXiv:2507.14401 ; LHCb-PAPER-2025-017 ; CERN-EP-2025-144 ; LHCB-PAPER-2025-017. - 2025 - 21.
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2025-07-21
08:55
Search for resonances decaying to photon pairs with masses between 4.9 and 19.4 GeV / LHCb Collaboration
A search is presented for axion-like particles (ALPs) with masses between 4.9 and 19.4 GeV decaying to a pair of photons, using proton-proton collisions collected with the LHCb detector during 2018 at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 2.1 fb$^{-1}$. [...]
arXiv:2507.14390 ; CERN-EP-2025-133 ; LHCb-PAPER-2025-012 ; LHCB-PAPER-2025-012. - 2025 - 21.
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2025-07-17
16:47
Precision measurement of the ${\it{\Xi}}_b^0$ baryon lifetime / LHCb Collaboration
A sample of $pp$ collision data, corresponding to an integrated luminosity of 5.4 fb$^{-1}$ and collected by the LHCb experiment during LHC Run 2, is used to measure the ratio of the lifetime of the ${\it{\Xi}}_b^0$ baryon to that of the ${\it{\Lambda}}_b^0$ baryon, $r_{\tau}\equiv\tau_{{\it{\Xi}}_b^0}/\tau_{{\it{\Lambda}}_b^0}$. [...]
arXiv:2507.12402 ; LHCb-PAPER-2025-023 ; CERN-EP-2025-139. - 2025 - 25.
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2025-07-15
10:24
First observation of the $\mathit{\Lambda}_b^{0}\!\rightarrow\mathit{\Lambda}_{c}^{+}D_{s}^{-}K^{+}K^{-}$ decay and search for pentaquarks in the $\mathit{\Lambda}_{c}^{+}D_{s}^{-}$ system / LHCb Collaboration
The $\mathit{\Lambda}_b^{0}\!\rightarrow\mathit{\Lambda}_{c}^{+}D_{s}^{-}K^{+}K^{-}$ decay is observed for the first time using the data sample from proton-proton collisions recorded at a center-of-mass energy of $13\,\text{TeV}$ with the LHCb detector, corresponding to an integrated luminosity of $6\,\text{fb}^{-1}$. [...]
arXiv:2507.10713 ; LHCb-PAPER-2025-022 ; CERN-EP-2025-138 ; LHCB-PAPER-2025-022. - 2025 - 24.
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2025-07-04
16:50
Measurement of transverse $\Lambda$ and $\bar\Lambda$ hyperon polarisation in $p$Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV / LHCb Collaboration
The transverse polarization of $Λ$ and $\barΛ$ hyperons is measured in $p$Pb collisions collected by the LHCb experiment at a nucleon-nucleon center-of-mass energy of $5.02 $ TeV. [...]
arXiv:2508.02009 ; LHCb-PAPER-2025-004 ; CERN-EP-2025-153 ; LHCB-PAPER-2025-004. - 2025 - 24.
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2025-06-27
17:01
Updated measurement of $CP$ violation and polarisation in $B^0_s \rightarrow J/\psi \overline{K}{}^{*}\kern-1pt(892)^{0}$ decays / LHCb Collaboration
A time-integrated angular analysis of the decay $B^0_s \rightarrow J/\psi \overline{K}{}^{*}\kern-1pt(892)^{0}$, with $J/\psi \rightarrow \mu^{+} \mu^{-}$ and $\overline{K}{}^{*}\kern-1pt(892)^{0} \rightarrow K^{-} \pi^{+}$, is presented. [...]
arXiv:2506.22090 ; LHCb-PAPER-2025-020 ; CERN-EP-2025-131 ; LHCB-PAPER-2025-020. - 2025-06-17 - 35.
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2025-06-16
15:07
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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