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LHCb Papers

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2022-01-10
15:35
Observation of the decay $ \Lambda_b^0\rightarrow \Lambda_c^+\tau^-\overline{\nu}_{\tau}$ / LHCb Collaboration
The first observation of the semileptonic $b$-baryon decay $ \Lambda_b^0 \rightarrow \Lambda_c^+ \tau^-\overline{\nu}_{\tau}$, with a significance of $6.1\,\sigma$, is reported using a data sample corresponding to 3 fb$^{-1}$ of integrated luminosity, collected by the LHCb experiment at centre-of-mass energies of 7 and 8~TeV at the LHC. [...]
arXiv:2201.03497 ; LHCb-PAPER-2021-044 ; CERN-EP-2021-265 ; LHCB-PAPER-2021-044. - 2022. - 21 p.
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2022-01-07
13:56
Observation of the $B^0\rightarrow\overline{D}^{*0}K^{+}\pi^{-}$ and $B_s^0\rightarrow\overline{D}^{*0}K^{-}\pi^{+}$ decays / LHCb Collaboration
The first observations of $B^0\rightarrow\overline{D}^{*}(2007)^{0}K^{+}\pi^{-}$ and $B_s^0\rightarrow\overline{D}^{*}(2007)^{0}K^{-}\pi^{+}$ decays are presented, and their branching fractions relative to that of the $B^0\rightarrow\overline{D}^{*}(2007)^{0}\pi^{+}\pi^{-}$ decay are reported. [...]
arXiv:2112.11428 ; LHCb-PAPER-2021-043 ; CERN-EP-2021-262 ; LHCB-PAPER-2021-043. - 2022. - 32 p.
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2022-01-05
13:53
Constraints on the CKM angle $\gamma$ from $B^\pm\rightarrow Dh^\pm$ decays using $D\rightarrow h^\pm h^{\prime\mp}\pi^0$ final states / LHCb Collaboration
A data sample collected with the LHCb detector, corresponding to an integrated luminosity of $9~{\rm fb}^{-1}$, is used to measure $CP$ observables in $B^\pm \to D h^\pm$ decays, where $h^{(\prime)}$ is either a kaon or a pion, and the neutral $D$ meson decay is reconstructed in the three-body final states $K^\pm \pi^\mp \pi^0$, $\pi^\pm \pi^\mp \pi^0$, and $K^\pm K^\mp \pi^0$. [...]
arXiv:2112.10617 ; LHCb-PAPER-2021-036 ; CERN-EP-2021-255 ; LHCB-PAPER-2021-036. - 2022. - 24 p.
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2021-12-15
11:01
Precision measurement of forward $Z$ boson production in proton-proton collisions at $\sqrt{s} = 13$ TeV / LHCb Collaboration
A precision measurement of the $Z$ boson production cross-section at $\sqrt{s} = 13$ TeV in the forward region is presented, using $pp$ collision data collected by the LHCb detector, corresponding to an integrated luminosity of 5.1 fb$^{-1}$. [...]
arXiv:2112.07458 ; LHCb-PAPER-2021-037 ; CERN-EP-2021-246 ; LHCB-PAPER-2021-037. - 2021. - 57 p.
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2021-12-06
12:17
Observation of $\Lambda_b^0\rightarrow D^+ p \pi^-\pi^-$ and $\Lambda_b^0\rightarrow D^{*+} p \pi^-\pi^-$ decays / LHCb Collaboration
The multihadron decays $\Lambda_b^0\rightarrow D^+ p \pi^-\pi^-$ and $\Lambda_b^0\rightarrow D^{*+} p \pi^-\pi^-$ are observed in data corresponding to an integrated luminosity of 3fb$^{-1}$, collected in proton-proton collisions at centre-of-mass energies of 7 and 8TeV by the LHCb detector [...]
arXiv:2112.02013 ; LHCb-PAPER-2021-040 ; CERN-EP-2021-237 ; LHCB-PAPER-2021-040. - 2021.
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2021-11-23
12:08
Measurement of the photon polarization in $\Lambda_{b}^{0}\to\Lambda\gamma$ decays / LHCb Collaboration
The photon polarization in $b\to s\gamma$ transitions is measured for the first time in radiative b-baryon decays exploiting the unique spin structure of $\Lambda_{b}^{0}\to\Lambda\gamma$ decays. [...]
arXiv:2111.10194 ; LHCb-PAPER-2021-030 ; CERN-EP-2021-230 ; LHCB-PAPER-2021-030. - 2021. - 20 p.
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2021-11-23
11:49
Searches for rare $B_s^0$ and $B^0$ decays into four muons / LHCb Collaboration
Searches for rare $B_s^0$ and $B^0$ decays into four muons are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 $\text{fb}^{-1}$ . [...]
arXiv:2111.11339 ; CERN-EP-2021-236 ; LHCB-PAPER-2021-039. - 2021. - 29 p.
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2021-11-08
11:29
Study of $ {\mathrm{B}}_{\mathrm{c}}^{+} $ decays to charmonia and three light hadrons / LHCb Collaboration
Using proton-proton collision data, corresponding to an integrated luminosity of $9fb^{-1}$ collected with the LHCb detector, seven decay modes of the $B_c^+$ meson into a $J/\psi$ or $\psi(2S)$ meson and three charged hadrons, kaons or pions, are studied. The decays $B_c^+\rightarrow ( \psi(2S) \rightarrow J/\psi \pi^+ \pi^-)\pi^+ $, $B_c^+\rightarrow \psi(2S)\pi^+\pi^+\pi^-$, $B_c^+\rightarrow J/\psi K^+\pi^+\pi^-$ and $B_c^+\rightarrow J/\psi K^+K^+K^-$ are observed for the first time, and evidence for the $B_c^+\rightarrow \psi(2S)K^+K^-\pi^+$ decay is found, where $J/\psi$ and $\psi(2S)$ mesons are reconstructed in their dimuon decay modes. [...]
arXiv:2111.03001; CERN-EP-2021-216; LHCB-PAPER-2021-034.- Geneva : CERN, 2022-01-13 - 28 p. - Published in : JHEP 2201 (2022) 065 Fulltext: LHCb-PAPER-2021-034 - PDF; 2111.03001 - PDF; document - PDF; Related data file(s): ZIP;

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2021-11-08
11:14
Angular analysis of $D^0 \to \pi^+\pi^-\mu^+\mu^-$ and $D^0 \to K^+K^-\mu^+\mu^-$ decays and search for $CP$ violation / LHCb Collaboration
The first full angular analysis and an updated measurement of the decay-rate $CP$ asymmetry of the $D^0 \to \pi^+\pi^-\mu^+\mu^-$ and $D^0 \to K^+K^-\mu^+\mu^-$ decays are reported. [...]
arXiv:2111.03327 ; LHCb-PAPER-2021-035 ; CERN-EP-2021-212 ; LHCB-PAPER-2021-035. - 2021. - 27 p.
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2021-10-20
11:52
Tests of lepton universality using $B^0\to K^0_S \ell^+ \ell^-$ and $B^+\to K^{*+}\ell^+\ell^-$ decays / LHCb Collaboration
Tests of lepton universality in $B^0\to K^0_S \ell^+ \ell^-$ and $B^+\to K^{*+}\ell^+\ell^-$ decays where $\ell$ is either an electron or a muon are presented. [...]
arXiv:2110.09501 ; LHCb-PAPER-2021-038 ; CERN-EP-2021-208 ; LHCB-PAPER-2021-038. - 2021. - 24 p.
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