# LHCb Papers

2018-08-03
09:58
 Angular moments of the decay $\Lambda_b^0 \rightarrow \Lambda \mu^{+} \mu^{-}$ at low hadronic recoil / LHCb Collaboration An analysis of the angular distribution of the decay $\Lambda_b^0 \rightarrow \Lambda \mu^{+} \mu^{-}$ is presented, using data collected with the LHCb detector between 2011 and 2016 and corresponding to an integrated luminosity of approximately 5 fb$^{-1}$. [...] arXiv:1808.00264 ; CERN-EP-2018-197 ; LHCb-PAPER-2018-029 ; LHCB-PAPER-2018-029. - 2018. - 27 p, 27 p. Fulltext - Related data file(s) - Supplementary information - Fulltext

2018-07-30
16:01
 Measurement of the relative $B^{-} \rightarrow D^{0} / D^{*0} / D^{**0} \mu^{-} \overline{\nu}_\mu$ branching fractions using $B^{-}$ mesons from $\overline{B}{}_{s2}^{*0}$ decays / LHCb Collaboration The decay of the narrow resonance $\overline{B}{}_{s2}^{*0}\!\rightarrow B^- K^+$ can be used to determine the $B^-$ momentum in partially reconstructed decays without any assumptions on the decay products of the $B^-$ meson. [...] arXiv:1807.10722 ; LHCb-PAPER-2018-024 ; CERN-EP-2018-190 ; LHCB-PAPER-2018-024. - 2018. - 27 p, 27 p. Fulltext - Related data file(s) - Fulltext - Supplementary information

2018-07-18
10:00
 Search for $C\!P$ violation in $\Lambda^0_b \to p K^-$ and $\Lambda^0_b \to p \pi^-$ decays / LHCb Collaboration A search for $C\!P$ violation in $\Lambda^0_b \to p K^-$ and $\Lambda^0_b \to p \pi^-$ decays is presented using a sample of $pp$ collisions collected with the LHCb detector and corresponding to an integrated luminosity of 3.0 fb$^{-1}$. [...] arXiv:1807.06544 ; LHCb-PAPER-2018-025 ; CERN-EP-2018-189 ; LHCB-PAPER-2018-025. - 2018. - 18 p, 18 p. Related data file(s) - Supplementary Information - Fulltext - Fulltext - Preprint

2018-07-16
15:53
 Measurement of $\Upsilon$ production in $pp$ collisions at $\sqrt{s}$= 13 TeV / LHCb Collaboration The production cross-sections of $\Upsilon(1S)$, $\Upsilon(2S)$ and $\Upsilon(3S)$ mesons in proton-proton collisions at $\sqrt{s}$= 13 TeV are measured with a data sample corresponding to an integrated luminosity of $277 \pm 11$ $\rm pb^{-1}$ recorded by the LHCb experiment in 2015. The $\Upsilon$ mesons are reconstructed in the decay mode $\Upsilon\to\mu^{+}\mu^{-}$. [...] LHCB-PAPER-2018-002; CERN-EP-2018-054; arXiv:1804.09214; LHCB-PAPER-2018-002.- 2018-07-20 - 26 p. - Published in : JHEP 07 (2018) 134 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;

2018-07-06
10:57
 First observation of the doubly charmed baryon decay $\Xi_{cc}^{++} \rightarrow \Xi_{c}^{+} \pi^{+}$ / LHCb Collaboration The doubly charmed baryon decay $\Xi_{cc}^{++} \rightarrow \Xi_{c}^{+} \pi^{+}$ is observed for the first time, with a statistical significance of $5.9\sigma$, confirming a recent observation of the baryon in the $\Lambda_c^{+} K^{-} \pi^{+} \pi^{+}$ final state [...] LHCb-PAPER-2018-026 ; CERN-EP-2018-172 ; LHCB-PAPER-2018-026 ; arXiv:1807.01919 ; LHCB-PAPER-2018-026. - 2018. - 17 p. Fulltext - Related data file(s) - Supplementary information - Full text

2018-07-06
10:51
 Measurement of the $\Omega_c^0$ baryon lifetime / LHCb Collaboration We report a measurement of the lifetime of the $\Omega_c^0$ baryon using proton-proton collision data at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3.0 fb$^{-1}$ collected by the LHCb experiment. [...] LHCb-PAPER-2018-028 ; CERN-EP-2018-175 ; arXiv:1807.02024 ; LHCB-PAPER-2018-028 ; LHCB-PAPER-2018-028. - 2018. - 17 p. Fulltext - Related data file(s) - Supplementary information - Fulltext

2018-06-29
15:46
 Measurement of angular and $C\!P$ asymmetries in $D^0 \to \pi^+\pi^-\mu^+\mu^-$ and $D^0 \to K^+K^-\mu^+\mu^-$ decays / LHCb Collaboration The first measurements of the forward-backward asymmetry of the dimuon pair ($A_{FB}$), the triple-product asymmetry ($A_{2\phi}$), and the charge-parity-conjugation asymmetry ($A_{CP}$), in $D^0\to\pi^+\pi^-\mu^+\mu^-$ and $D^0\to K^+K^-\mu^+\mu^-$ decays are reported. [...] CERN-EP-2018-162 ; LHCb-PAPER-2018-020 ; arXiv:1806.10793 ; LHCB-PAPER-2018-020 ; LHCB-PAPER-2018-020. - 2018. - 15 p. Fulltext - Related data file(s) - Fulltext - Supplementary information

2018-06-28
12:03
 Observation of the decay $\overline{B_s^0} \rightarrow \chi_{c2} K^+ K^-$ / LHCb Collaboration The $\overline{B_s^0} \rightarrow \chi_{c2} K^+ K^-$ decay mode is observed and its branching fraction relative to the corresponding $\chi_{c1}$ decay mode, in a $\pm 15 \textrm{MeV}/c^2$ window around the $\phi$ mass, is found to be $$\frac{\mathcal{B}(\overline{B_s^0} \rightarrow \chi_{c2} K^+ K^-) }{ \mathcal{B}(\overline{B_s^0} \rightarrow \chi_{c1} K^+K^-)} = (17.1 \pm 3.1 \pm 0.4 \pm 0.9)\%,$$ where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the branching fractions of radiative $\chi_c$ decays. [...] LHCb-PAPER-2018-018 ; CERN-EP-2018-160 ; arXiv:1806.10576 ; LHCB-PAPER-2018-018. - 2018. - 20 p. Fulltext - Related data file(s) - Supplementary information

2018-06-26
11:08
 Search for beautiful tetraquarks in the $\Upsilon(1S)\mu^+\mu^-$ invariant-mass spectrum / LHCb Collaboration The $\Upsilon(1S)\mu^+\mu^-$ invariant-mass distribution is investigated for a possible exotic meson state composed of two $b$ quarks and two $\overline{b}$ quarks, $X_{b\overline{b}b\overline{b}}$. [...] LHCb-PAPER-2018-027 ; CERN-EP-2018-163 ; arXiv:1806.09707 ; LHCB-PAPER-2018-027 ; LHCB-PAPER-2018-027. - 2018. - 21 p. Fulltext - Related data file(s) - Fulltext

2018-06-21
14:15
 Observation of the decay $\Lambda^0_b\rightarrow\psi(2S)p\pi^-$ / LHCb Collaboration The Cabibbo-suppressed decay $\Lambda^0_b\rightarrow\psi(2S)p\pi^-$ is observed for the first time using a data sample collected by the LHCb experiment in proton-proton collisions corresponding to 1.0, 2.0 and 1.9fb$^{-1}$ of integrated luminosity at centre-of-mass energies of 7, 8 and 13TeV, respectively. [...] CERN-EP-2018-156 ; LHCb-PAPER-2018-022 ; arXiv:1806.08084 ; LHCB-PAPER-2018-022 ; LHCB-PAPER-2018-022. - 2018. - 16 p. Fulltext - Related data file(s) - Supplementary information - Fulltext