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LHCb Conference Contributions

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2024-04-02
18:14
Observation of the rare decay $J\mskip -3mu/\mskip -2mu\psi \to \mu^+\mu^-\mu^+\mu^-$ /LHCb Collaboration
The rare electromagnetic decay $J\mskip -3mu/\mskip -2mu\psi \to \mu^+\mu^-\mu^+\mu^-$ is observed with significance greatly exceeding the discovery threshold, using the proton-proton collision data collected by the LHCb experiment in 2016-2018 at a center-of-mass energy of 13 $\textrm{TeV}$, corresponding to an integrated luminosity of 5.4 $\text{fb}^{-1}$. The rate of this decay is measured relative to that of $J\mskip -3mu/\mskip -2mu\psi \to \mu^+\mu^-$ mode. [...]
LHCb-CONF-2024-001; CERN-LHCb-CONF-2024-001.- Geneva : CERN, 2024 - 17. Fulltext: LHCb-CONF-2024-001 - PDF; LHCb-CONF-2024-001_Figures - ZIP;
In : 58th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, It, 31 Mar - 7 Apr 2024

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2023-10-24
09:25
Pending /LHCb Collaboration
Pending
LHCb-CONF-2023-005; CERN-LHCb-CONF-2023-005.- Geneva : CERN, 2023 - 23.
In : 12th International Workshop on the CKM Unitarity Triangle (CKM 2023), Santiago De Compostela, Spain, 18 - 22 Sep 2023

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2023-10-04
14:36
Measurement of $CP$ asymmetry in $B^0_s \rightarrow D^{\mp}_s K^{\pm}$ decays /LHCb Collaboration
A measurement of the $CP$-violating parameters in $B^0_s \rightarrow > D^{\mp}_s K^{\pm}$ decays obtained from $pp$ collisions is reported, using a data set corresponding to an integrated luminosity of $6\,\textrm{fb}^{-1}$ at a centre-of-mass energy of ${\sqrt{s}=13 \,\textrm{TeV}}$ recorded with the LHCb detector between 2015 and 2018. The measured values are: > \begin{align*} C_f &= \phantom{+}0.791 \pm 0.061 \pm 0.022 \, , \\ A_f^{\Delta \Gamma} &= -0.051 \pm 0.134 \pm 0.037\, , \\ A_{\bar{f}}^{\Delta \Gamma} &= -0.303 \pm 0.125 \pm 0.036\, , \\ S_f &= -0.571 \pm 0.084 \pm 0.023\, , \\ S_{\bar{f}} &= -0.503 \pm 0.084 \pm 0.025 \, , \end{align*} where the uncertainties are statistical and systematic, respectively. [...]
LHCb-CONF-2023-004; CERN-LHCb-CONF-2023-004.- Geneva : CERN, 2023 - 25. Fulltext: LHCb-CONF-2023-004-Fig-Supplementary - ZIP; LHCb-CONF-2023-004 - PDF; LHCb-CONF-2023-004_final_typofix - PDF; LHCb-CONF-2023-004-Fig - ZIP;
In : 12th International Workshop on the CKM Unitarity Triangle (CKM 2023), Santiago De Compostela, Spain, 18 - 22 Sep 2023

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2023-10-04
14:25
Study of $CP$-violation in $B^0 \to D K^{*}(892)^0$ decays with $D\to K\pi(\pi\pi)$, $\pi\pi(\pi\pi)$, and $KK$ final states /LHCb Collaboration
The $CP$-violating observables associated with the interference of $B^0\to D^0 K^{*}(892)^0$ and $B^0\to \overline{D}^{0} K^{*}(892)^0$ decay amplitudes are measured in the $D^0 \to K^{\mp}\pi^{\pm}(\pi^{+}\pi^{-}),$ $D^0 \to \pi^{+}\pi^{-}(\pi^{+}\pi^{-})$, and $D^0\to K^+K^-$ final states with proton-proton data collected by the LHCb experiment corresponding to an integrated luminosity of $9 \text{fb}^{-1}$. These observables are used to set constraints on the parameter space of the CKM angle $\gamma$ and the hadronic parameters $r_{B^0}^{D K^{*}}$ and $\delta_{B^0}^{DK^{*}}$ with inputs from other measurements [...]
LHCb-CONF-2023-003; CERN-LHCb-CONF-2023-003.- Geneva : CERN, 2023 - 23. Fulltext: figs - ZIP; LHCb-CONF-2023-003 - PDF;
In : 12th International Workshop on the CKM Unitarity Triangle (CKM 2023), Santiago De Compostela, Spain, 18 - 22 Sep 2023

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2023-08-23
09:47
Observation of antihypertriton in $pp$ collisions with LHCb /LHCb Collaboration
The first observation at the LHCb experiment of hypertritons and antihypertritons is reported. The dataset consists of $pp$ collisions at $\sqrt{s}=13{\rm \,Te\kern -0.1em V}$, collected between 2016 and 2018 and corresponding to an integrated luminosity of $5.5\,{\rm fb}^{-1}$. [...]
LHCb-CONF-2023-002; CERN-LHCb-CONF-2023-002.- Geneva : CERN, 2023 - 8. Fulltext: LHCb-CONF-2023002zip - ZIP; LHCb-CONF-2023-002 - PDF;
In : 2023 European Physical Society Conference on High Energy Physics (EPS-HEP2023), Hamburg, Germany, 20 - 25 Aug 2023

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2023-08-22
14:58
Study of $\Xi^-_b$ and $\Omega^-_b$ decays to $\Lambda_c^+ h^- h^{\prime -}$ final states /LHCb Collaboration
Decays of $\Xi_b^-$ and $\Omega_b^-$ baryons to $\Lambda_c^+ h^- h^{\prime -}$ final states, with $h^- h^{\prime -}$ being $\pi^-\pi^-$, $K^-\pi^-$ and $K^-K^-$, are searched for using data collected with the LHCb detector. The data sample studied corresponds to an integrated luminosity of $8.7 \,{\rm fb}^{-1}$ of $pp$ collisions collected at centre-of-mass energies $\sqrt{s} = 7$, $8$ and $13 \,{\rm TeV}$. [...]
LHCb-CONF-2023-001; CERN-LHCb-CONF-2023-001.- Geneva : CERN, 2023 - 22. Fulltext: LHCb-CONF-2023-001-plots (1) - ZIP; LHCb-CONF-2023-001 - PDF;
In : 2023 European Physical Society Conference on High Energy Physics (EPS-HEP2023), Hamburg, Germany, 20 - 25 Aug 2023

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2022-10-21
10:14
Simultaneous determination of the CKM angle $\gamma$ and parameters related to mixing and CP violation in the charm sector /LHCb Collaboration
A combination of measurements sensitive to the $C\!P$ violation angle $\gamma$ of the Cabibbo--Kobayashi--Maskawa unitarity triangle, to the charm mixing parameters that describe oscillations between $D^0$ and $\bar{D}^0$ mesons, and to $C\!P$ asymmetries in the $D^0 \to K^+ K^-$ and $D^0 \to \pi^+ \pi^-$ decays is performed. All relevant beauty and charm results obtained with the data collected with the LHCb detector at CERN's Large Hadron Collider to date are included. [...]
LHCb-CONF-2022-003; CERN-LHCb-CONF-2022-003.- Geneva : CERN, 2022 - 22. Fulltext: LHCb-CONF-2022-002 - PDF; LHCb-CONF-2022-003_figures - ZIP;

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2022-04-21
11:03
Modification of $\chi{_{c1}(3872)}$ and $\psi{(2S)}$ production in $p$Pb collisions at $\sqrt{s_{NN}} = 8.16$ TeV /LHCb Collaboration
Production of the exotic state $\chi{_{c1}(3872)}$ is measured in $p$Pb collisions at both forward and backward rapidity by the LHCb experiment. Comparisons with the charmonium state $\psi{(2S)}$ suggest that the $\chi{_{c1}(3872)}$ state experiences different dynamics in the nuclear medium than conventional hadrons. [...]
LHCb-CONF-2022-001; CERN-LHCb-CONF-2022-001.- Geneva : CERN, 2022 - 11. Fulltext: LHCb-CONF-2022-001 - PDF; CONF-2022-001-Figures - ZIP;
In : 29th International Conference on Ultra-relativistic Nucleus-Nucleus Collisions, Krakow, Poland, 4 - 10 Apr 2022, pp.LHCb-CONF-2022-001

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2021-08-05
16:55
Simultaneous determination of CKM angle $\gamma$ and charm mixing parameters /LHCb Collaboration
A combination of measurements sensitive to the $CP$ violation angle $\gamma$ of the Cabibbo--Kobayashi--Maskawa (CKM) unitarity triangle and to the charm mixing parameters that describe oscillations between $D^0$ and $\overline{D}^0$ mesons is performed. Results from the charm and beauty sectors, based on data collected with the LHCb detector at CERN's Large Hadron Collider, are included together for the first time. [...]
LHCb-CONF-2021-001; CERN-LHCb-CONF-2021-001.- Geneva : CERN, 2021 - 22. Fulltext: LHCb-CONF-2021-001 - PDF; LHCb-CONF-2021-001-figures - ZIP;
In : European Physics Society conference on High Energy Physics 2021, Online, Online, 26 - 30 Jul 2021

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2020-10-29
15:57
Updated LHCb combination of the CKM angle $\gamma$ /LHCb Collaboration
The latest results of the CKM angle $\gamma$ combination are presented for the 2020 LHCb Implications Workshop. New and updated inputs from $B^+ \to Dh^+$ ($D\to h^+h^-$), $B^+ \to Dh^+$ ($D \to K^0_{\rm S} h^+h^-$), $B^+ \to Dh^+$ ($D \to K^0_{\rm S} K^+ \pi^-$), $B^+ \to D^*h^+$ ($D\to h^+h^-$), $B^0 \to D K^{*0}$ ($D\to h^+h^-$ and $D\to h^+\pi^-\pi^+\pi^-$) and $B^0_s \to D^\mp_s K^\pm \pi^\mp \pi^\pm$ ($D^+_s \to h^+ h^- \pi^+$) decays are included, where $h = K$ or $\pi$. [...]
LHCb-CONF-2020-003; CERN-LHCb-CONF-2020-003.- Geneva : CERN, 2020 - mult.p. Fulltext: LHCb-CONF-2020-003-figures - ZIP; LHCb-CONF-2020-003 - PDF;
In : Implications of LHCb measurements and future prospects, Cern, Switzerland, 28 - 30 Oct 2020

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