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EP Preprints

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2026-03-11
16:59
First measurement of the decay-time-integrated $C\!P$ asymmetry in $B_s^0 \to D_s^- \pi^+$ decays / LHCb Collaboration
A measurement of the flavour-untagged decay-time-integrated ${C\!P}$ asymmetry in the flavour-specific decay ${B_s^0 \to D_s^-\pi^+}$, ${\langle A^s_{\rm untagged}\rangle}$, is performed using proton-proton collision data collected by the LHCb experiment between 2016 and 2018 at a center-of-mass energy of ${13\,{\rm TeV}}$, corresponding to a total integrated luminosity of ${5.4\,{\rm fb}^{-1}}$. [...]
arXiv:2603.10860 ; LHCb-PAPER-2025-074 ; CERN-EP-2026-028 ; LHCB-PAPER-2025-074. - 2026 - 18 p, 18.
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2026-03-10
17:06
Improved branching-fraction measurements of $B^0_{(s)} \to K_S^0 h^+ h^{'-}$ decays and first observation of $B^0_{s} \to K_S^0 K^+ K^-$ / LHCb Collaboration
This paper presents a study of the charmless three-body decays ${B^0_{(s)} \to K_{\mathrm{S}}^0 h^+ h^{\prime -}}$ (where $h^{(\prime)} = \pi, K$), using a sample of $pp$ collision data collected by the LHCb experiment, corresponding to an integrated luminosity of $9{\,fb}^{-1}$. [...]
arXiv:2603.08621 ; LHCb-PAPER-2024-029 ; CERN-EP-2026-029. - 2026 - 37.
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2026-03-02
13:19
n_TOF Collaboration Open Data Policy
The n_TOF Collaboration’s Open Data Policy aligns with CERN’s open science policy and the FAIR principles. [...]
CERN-OPEN-2026-003. - 2025 - 2.
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2026-02-19
15:34
Polarization measurement of $\Lambda^+_c$ and $\overline{\Lambda}{}^-_c$ baryons in $p$Ne collisions at $\sqrt{s_{NN}} = 68.6$ GeV / LHCb Collaboration
The first measurement of the polarization of charm baryons by the LHCb experiment recorded in fixed-target mode is presented. [...]
arXiv:2602.17184 ; LHCb-PAPER-2025-060 ; CERN-EP-2026-016 ; LHCB-PAPER-2025-060. - 2026 - 23 p, 23.
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2026-01-29
17:31
Search for $\tau^-\to \mu^- \mu^+\mu^-$ decays at the LHCb experiment with Run 2 data / LHCb Collaboration
A search for the lepton-flavour-violating decay $\tau^-\to\mu^-\mu^+\mu^-$ is carried out using data collected by the LHCb experiment between 2016 and 2018 in proton-proton collisions at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb$^{-1}$. [...]
arXiv:2601.20785 ; LHCb-PAPER-2025-052 ; CERN-EP-2026-003. - 2026 - 22.
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2026-01-29
14:05
Observation of the decay $\chi_{c1}(3872) \to J/\psi \mu^+ \mu^-$ / LHCb Collaboration
The first observation of the $\chi_{c1}(3872)\rightarrow J\mskip -3mu/\mskip -2mu\psi \mu^+\mu^-$ decay is reported using proton-proton collision data recorded with the LHCb detector corresponding to an integrated luminosity of $9fb^{-1}$. [...]
arXiv:2601.20790 ; LHCb-PAPER-2025-043 ; CERN-EP-2025-271 ; LHCB-PAPER-2025-043. - 2026 - 21.
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2026-01-26
10:45
Observation of $CP$ violation in $B^0 \to J/\psi \rho(770)^0$ decays / LHCb Collaboration
The time-dependent $C\!P$ asymmetry in $B^{0}\!\to{J\mskip-3mu/\mskip-2mu\psi}\rho(770)^0$ decays is measured using proton-proton collision data corresponding to an integrated luminosity of 6$fb^{-1}$ collected with the LHCb detector at a center-of-mass energy of 13 TeV during the years 2015–2018. [...]
LHCb-PAPER-2025-059 ; CERN-EP-2025-295 ; arXiv:2601.15646 ; LHCB-PAPER-2025-059. - 2026 - 21.
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2026-01-14
09:07
Search for lepton-number-violating $B^-\to D^{(*)+}\mu^-\mu^-$ decays / LHCb Collaboration
A search is performed for lepton-number-violating $B^-\to D^{(*)+}\mu^-\mu^-$ decays, using data collected by the LHCb experiment in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb$^{-1}$. [...]
arXiv:2601.07657 ; LHCb-PAPER-2025-033 ; CERN-EP-2025-267 ; LHCB-PAPER-2025-033. - 2026 - 22.
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2026-01-13
15:40
Evidence for the rare decay $B^{+} \to \bar \Lambda p \mu^{+} \mu^{-}$ / LHCb Collaboration
A search for the rare decay $B^{+} \to \bar \Lambda p \mu^{+} \mu^{- }$ is performed using proton-proton collision data recorded by the LHCb experiment at a center-of-mass energy of $\sqrt{s}= 13$ TeV, corresponding to an integrated luminosity of 5.4 fb$^-1$. [...]
arXiv:2601.06878 ; LHCb-PAPER-2025-051 ; CERN-EP-2025-277 ; LHCB-PAPER-2025-051. - 2026 - 13.
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2026-01-07
15:25
First evidence of the $B_s^0\rightarrow K^-\pi^+\gamma$ decay / LHCb Collaboration
The first search for the $B_s^0\rightarrow K^-\pi^+\gamma$ decay in the range $796< m(K^-\pi^+)<1800\,\text{Me\kern -0.1em V\!/}c^2$ is performed using 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 fb$^{-1}$. [...]
arXiv:2601.03083 ; LHCb-PAPER-2025-056 ; CERN-EP-2025-276 ; LHCB-PAPER-2025-056. - 2026 - 23.
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