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CERN Document Server Znaleziono 2,035 rekordów  1 - 10następnykoniec  skocz do rekordu: Szukanie trwało 5.38 sekund. 
1.
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Precision measurement of the $B_{c}^{+}$ meson mass / LHCb Collaboration
A precision measurement of the $B_{c}^{+}$ meson mass is performed using proton-proton collision data collected with the LHCb experiment at centre-of-mass energies of $7, 8$ and $13$ TeV, corresponding to a total integrated luminosity of $9.0$ fb$^{-1}$. The $B_{c}^{+}$ mesons are reconstructed via the decays $B_{c}^{+} \rightarrow J\mskip -3mu/\mskip -2mu\psi\mskip 2mu \pi^+$, $B_{c}^{+} \rightarrow J\mskip -3mu/\mskip -2mu\psi\mskip 2mu \pi^+ \pi^- \pi^+$, $B_{c}^{+} \rightarrow J\mskip -3mu/\mskip -2mu\psi\mskip 2mu p \bar{p} \pi^+$, $B_{c}^{+} \rightarrow J\mskip -3mu/\mskip -2mu\psi\mskip 2mu D_{s}^{+}$, $B_{c}^{+} \rightarrow J\mskip -3mu/\mskip -2mu\psi\mskip 2mu D^{0} K^{+}$ and $B_{c}^{+} \rightarrow B_{s}^{0} \pi^+$. [...]
arXiv:2004.08163; LHCb-PAPER-2020-003; CERN-EP-2020-048; LHCB-PAPER-2020-003.- Geneva : CERN, 2020-07-20 - 21 p. - Published in : JHEP 2007 (2020) 123 Article from SCOAP3: PDF; Fulltext: LHCb-PAPER-2020-003_arXiv - PDF; 2004.08163 - PDF; Related data file(s): ZIP;
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(91)
Search for the doubly heavy $\mathit{\Xi}_{bc}^{0}$ baryon via decays to $D^0pK^-$ / LHCb Collaboration
A search for the doubly heavy $\mathit{\Xi}_{bc}^{0}$ baryon using its decay to the $D^0pK^-$ final state is performed using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the LHCb experiment between 2016 and 2018, corresponding to an integrated luminosity of 5.4 $\mathrm{fb}^{-1}$. No significant signal is found in the invariant mass range from 6.7 to 7.2 $\mathrm{GeV}/c^2$. [...]
arXiv:2009.02481; LHCb-PAPER-2020-014; CERN-EP-2020-137; LHCB-PAPER-2020-014.- Geneva : CERN, 2020 - 21 p. - Published in : JHEP 2011 (2020) 095 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
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3.
(86)
Updated search for $B_c^+$ decays to two charm mesons / LHCb Collaboration
A data set corresponding to an integrated luminosity of $9 \text{\, fb}^{-1}$ of proton-proton collisions collected by the LHCb experiment has been analysed to search for $B_c^+ \to D^{(*)+}_{(s)} (\overline{D})^{(*)0}$ decays. The decays are fully or partially reconstructed, where one or two missing neutral pions or photons from the decay of an excited charm meson are allowed. [...]
arXiv:2109.00488; LHCb-PAPER-2021-023; CERN-EP-2021-154; LHCB-PAPER-2021-023.- Geneva : CERN, 2021 - 23 p. - Published in : JHEP 2112 (2021) 117 Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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4.
(85)
Observation of enhanced double parton scattering in proton-lead collisions at $\sqrt{s_\mathrm{NN}}=8.16$ TeV / LHCb Collaboration
A study of prompt charm-hadron pair production in proton-lead collisions at $\sqrt{s_\mathrm{NN}}= 8.16$ TeV is performed using data corresponding to an integrated luminosity of about 30 nb${}^{-1}$, collected with the LHCb experiment. Production cross-sections for different pairs of charm hadrons are measured and kinematic correlations between the two charm hadrons are investigated. [...]
arXiv:2007.06945; LHCb-PAPER-2020-010; CERN-EP-2020-119; LHCB-PAPER-2020-010.- Geneva : CERN, 2020-11-20 - 13 p. - Published in : Phys. Rev. Lett. 125 (2020) 212001 Article from SCOAP3: PDF; Fulltext: 2007.06945 - PDF; Paper-2020-010 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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5.
(85)
First observation of the decay $\Lambda_b^0 \to \eta_c(1S) p K^-$ / LHCb Collaboration
The decay $\Lambda_b^0 \to \eta_c(1S) p K^-$ is observed for the first time using a data sample of proton-proton collisions, corresponding to an integrated luminosity of 5.5 $fb^{-1}$, collected with the LHCb experiment at a centre-of-mass energy of 13 TeV. The branching fraction of the decay is measured, using the $\Lambda_b^0 \to J/\psi p K^-$ decay as a normalisation mode, to be $\mathcal{B}(\Lambda_b^0 \to \eta_c(1S) p K^-)=(1.06\pm0.16\pm0.06^{+0.22}_{-0.19})\times10^{-4}$, where the quoted uncertainties are statistical, systematic and due to external inputs, respectively. [...]
arXiv:2007.11292; LHCb-PAPER-2020-012; CERN-EP-2020-124; LHCB-PAPER-2020-012.- Geneva : CERN, 2020-12-23 - 12 p. - Published in : Phys. Rev. D 102 (2020) 112012 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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(84)
Observation of the $\varLambda^{0}_{b}\to\varLambda^{+}_{c}K^{+}K^{-}\pi^{-}$ decay / LHCb Collaboration
The $\varLambda^{0}_{b}\to\varLambda^{+}_{c}K^{+}K^{-}\pi^{-}$ decay is observed for the first time using a data sample of proton-proton collisions at centre-of-mass energies of $\sqrt{s}=7$ and 8 $\rm{TeV}$ collected by the $\mbox{LHCb}$ detector, corresponding to an integrated luminosity of $3{\rm{fb}^{-1}}$. The ratio of branching fractions between the $\varLambda^{0}_{b}\to\varLambda^{+}_{c}K^{+}K^{-}\pi^{-}$ and the $\varLambda^{0}_{b}\to\varLambda^{+}_{c}D^{-}_{s}$ decays is measured to be \begin{equation*} \frac{\mathcal{B} ( \varLambda^{0}_{b}\to\varLambda^{+}_{c}K^{+}K^{-}\pi^{-}) } {\mathcal{B} ( \varLambda^{0}_{b}\to\varLambda^{+}_{c} D^{-}_{s})} = (9.26 \pm 0.29 \pm 0.46 \pm 0.26)\times10^{-2}, \end{equation*} where the first uncertainty is statistical, the second systematic and the third is due to the knowledge of the $D^{-}_{s}\to K^{+}K^{-}\pi^{-}$ branching fraction. [...]
arXiv:2011.13738; LHCb-PAPER-2020-028; CERN-EP-2020-209; LHCB-PAPER-2020-028; LHCB-PAPER-2020-028.- Geneva : CERN, 2021-04-10 - 20 p. - Published in : Phys. Lett. B 815 (2021) 136172 Article from SCOAP3: PDF; Fulltext: PAPER-LHCb-2020-028-arXiv - PDF; 2011.13738 - PDF; Related data file(s): ZIP;
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(84)
Search for heavy neutral leptons in $W^+ \to \mu^+ \mu^{\pm} jet $ decays / LHCb Collaboration
A search is performed for heavy neutrinos in the decay of a $W$ boson into two muons and a jet. The data set corresponds to an integrated luminosity of approximately $3.0 \text{ fb}^{- 1}$ of proton-proton collision data at centre-of-mass energies of 7 and $8 \text{ TeV}$ collected with the LHCb experiment. [...]
arXiv:2011.05263; LHCb-PAPER-2020-022; CERN-EP-2020-194; LHCB-PAPER-2020-022.- Geneva : CERN, 2021-03-22 - 15 p. - Published in : Eur. Phys. J. C 81 (2021) 248 Article from SCOAP3: PDF; Fulltext: 2011.05263 - PDF; LHCb-PAPER-2020-022 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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(84)
Search for long-lived particles decaying to $e^{\pm} \mu^{\mp} \nu$ / LHCb Collaboration
Long-lived particles decaying to $e^\pm \mu^\mp \nu$, with masses between 7 and 50 GeV/c$^2$ and lifetimes between 2 and 50 ps, are searched for by looking at displaced vertices containing electrons and muons of opposite charges. The search is performed using 5.4 fb$^{-1}$ of $pp$ collisions collected with the LHCb detector at a centre-of-mass energy of $\sqrt{s} = 13$ TeV. [...]
arXiv:2012.02696; LHCb-PAPER-2020-027; CERN-EP-2020-212.- Geneva : CERN, 2021-03-26 - 16 p. - Published in : Eur. Phys. J. C 81 (2021) 261 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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9.
(84)
First observation of the decay $B_s^0 \to K^-\mu^+\nu_\mu$ and measurement of $|V_{ub}|/|V_{cb}|$ / LHCb Collaboration
The first observation of the suppressed semileptonic $B_s^0 \to K^-\mu^+\nu_\mu$ decay is reported. Using a data sample recorded in $pp$ collisions in 2012 with the LHCb detector, corresponding to an integrated luminosity of 2 $\mathrm{fb}^{-1}$, the branching fraction $\mathcal{B}(B_s^0 \to K^-\mu^+\nu_\mu)$} is measured to be $(1.06\pm0.05~(\mathrm{stat})\pm0.08~(\mathrm{syst}))\times 10^{-4}$, where the first uncertainty is statistical and the second one represents the combined systematic uncertainties. [...]
arXiv:2012.05143; LHCb-PAPER-2020-038; CERN-EP-2020-224; CERN-EP-2020-224; LHCB-PAPER-2020-038.- Geneva : CERN, 2021-02-25 - 11 p. - Published in : Phys. Rev. Lett. 126 (2021) 081804 Article from SCOAP3: PDF; Fulltext: LHCb-PAPER-2020-038 - PDF; 2012.05143 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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10.
(84)
Observation of structure in the $J/\psi$-pair mass spectrum / LHCb Collaboration
Using proton-proton collision data at centre-of-mass energies of $\sqrt{s} = 7$, $8$ and $13\mathrm{\,TeV}$ recorded by the LHCb experiment at the Large Hadron Collider, corresponding to an integrated luminosity of $9\mathrm{\,fb}^{-1}$, the invariant mass spectrum of $J/\psi$ pairs is studied. A narrow structure around $6.9\mathrm{\,GeV/}c^2$ matching the lineshape of a resonance and a broad structure just above twice the $J/\psi$ mass are observed. [...]
arXiv:2006.16957; CERN-EP-2020-115; LHCb-PAPER-2020-011; LHCB-PAPER-2020-011.- Geneva : CERN, 2020-12-15 - 11 p. - Published in : Sci. Bull. 65 (2020) 1983-1993 Fulltext: PDF; Related data file(s): ZIP; External link: Press Release
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