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EP Preprints

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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 p, 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 p, 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 $B^{+} \to \bar \Lambda p \mu^{+} \mu^{-}$
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$^-1$. [...]
CERN-EP-2025-277 ; arXiv:2601.06878 ; LHCB-PAPER-2025-051. - 2026
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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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2026-01-05
16:33
A comprehensive analysis of the $B^0 \to K^{*0} \mu^+\mu^-$ decay / LHCb Collaboration
An analysis of the $B^{0}\rightarrow K^{*0}(\to K^+\pi^-)\mu^{+}\mu^{-}$ decay is presented using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 8.4 fb$^{-1}$. [...]
arXiv:2512.18053 ; LHCb-PAPER-2025-041 ; CERN-EP-2025-278 ; LHCB-PAPER-2025-041. - 26.
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2025-12-17
13:49
Search for heavy neutral leptons in B-meson decays / LHCb Collaboration
A search for long-lived heavy neutral leptons produced in B-meson decays and decaying to a $\mu^\pm \pi^\mp$ final state is performed with data collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of $5\,\mathrm{fb}^{-1}$. [...]
arXiv:2512.14551 ; LHCb-PAPER-2025-042 ; CERN-EP-2025-264 ; LHCB-PAPER-2025-042. - 2025 - 30.
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2025-12-12
14:10
Measurement of the top-quark production cross-section and charge asymmetry at LHCb / LHCb Collaboration
The first measurements of the top- and antitop-quark differential production cross-sections and the top-quark charge asymmetry in the forward region are presented, using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 5.4 $fb^{-1}$. [...]
arXiv:2512.11324 ; LHCb-PAPER-2025-057 ; CERN-EP-2025-274 ; LHCB-PAPER-2025-057. - 2025 - 25.
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2025-12-11
13:40
Precision measurement of CP violation and branching fractions in $B^{\pm} \to K^0_{\mathrm{S}} h^{\pm}$ $(h = \pi, K)$ decays and search for the rare decay $B_c^{\pm} \to K ^0_{\mathrm{S}} K^{\pm}$ / LHCb Collaboration
An analysis of the decays $B^{\pm} \to K^0_{\mathrm{S}} \pi^{\pm}$ and $B^{\pm} \to K^0_{\mathrm{S}} K^{\pm}$ is performed using proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of $13 TeV$, corresponding to an integrated luminosity of 5.4fb$^{-1}$. [...]
arXiv:2512.09288 ; CERN-EP-2025-261 ; LHCb-PAPER-2025-049 ; LHCB-PAPER-2025-049. - 2025 - 23.
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