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CERN Document Server Sök i 88 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 0.68 sekunder. 
1.
The MDT Trigger Processor upgrade for ATLAS Muons at the HL-LHC / Loustau De Linares, Guillermo (University of Massachusetts (US)) /ATLAS Collaboration
The Monitored Drift Tube (MDT) chambers Trigger Processor (MDT-TP) is a key component in the upgrade of the first-level muon trigger for ATLAS at the High-Luminosity LHC (HL-LHC). The selectivity of the current system is limited by the moderate spatial resolution of the trigger chambers: Resistive Plate Chambers (RPC) and Thin Gap Chambers (TGC). [...]
ATL-DAQ-SLIDE-2023-540.- Geneva : CERN, 2023 - 1 p. Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : The 31th International Symposium on Lepton-Photon Interactions at High Energies (Lepton Photon 2023), Melbourne, Victoria, Australia, 17 - 21 Jul 2023
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2.
Spectroscopy in Beauty Decays at the LHCb Experiment / LHCb Collaboration
The beauty hadron decays is unique laboratory to study charmonium and charmonium-like states, such as the $\chi_{c1}(3872)$ meson, other exotic states and the tensor $D$-wave $\Psi_2(3823)$ states. However the nature of many exotic charmonium-like candidates are still unknown. [...]
arXiv:2103.04453; LHCb-PROC-2021-006; CERN-LHCb-PROC-2021-006; CERN-LHCb-PROC-2021-006.- Geneva : CERN, 2021 - 7 p. - Published in : Acta Phys. Pol. B 52 (2021) 1047 Fulltext: document - PDF; 2103.04453 - PDF; LHCb-PROC-2021-006 - PDF;
In : XXVII Cracow Epiphany Conference on Future of particle physics (Epiphany2021), Online, Poland, 7 - 10 Jan 2021, pp.1047
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3.
Angular Analysis of the $B^{+}\rightarrow K^{\ast+}\mu^{+}\mu^{-}$ Decay / LHCb Collaboration
We present an angular analysis of the $B^{+}\rightarrow K^{\ast+}(\rightarrow K_{S}^{0}\pi^{+})\mu^{+}\mu^{-}$ decay using 9$\,\mbox{fb}^{-1}$ of $pp$ collision data collected with the LHCb experiment. For the first time, the full set of CP-averaged angular observables is measured in intervals of the dimuon invariant mass squared. [...]
arXiv:2012.13241; LHCb-PAPER-2020-041; CERN-EP-2020-239.- 2021-04-23 - 11 p. - Published in : Phys. Rev. Lett. 126 (2021) 161802 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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4.
Observation of the $B_s^0 \rightarrow D^{\ast \pm} D^{\mp}$ decay / LHCb Collaboration
A search for the $B^0_s \!\rightarrow D^{*\pm} D^\mp$ decay is performed using proton-proton collision data at centre-of-mass energies of $7$, $8$ and $13\,\text{TeV}$ collected by the LHCb experiment, corresponding to an integrated luminosity of $9\,\text{fb}^{-1}$. The decay is observed with a high significance and its branching fraction relative to the $B^0 \!\rightarrow D^{*\pm} D^\mp$ decay is measured to be \begin{align*} \frac{\mathcal{B}(B_s^0 \rightarrow D^{\ast \pm} D^{\mp}) }{\mathcal{B}(B^0 \rightarrow D^{\ast \pm} D^{\mp}) } = 0.137 \pm 0.017 \pm 0.002 \pm 0.006 \,, \end{align*} where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the $B_s^0$ and $B^0$ hadronisation fractions..
arXiv:2012.11341; LHCb-PAPER-2020-037; CERN-EP-2020-230.- 2021-03-09 - 19 p. - Published in : JHEP 2103 (2021) 099 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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5.
Measurement of CP violation in the decay $B^{+} \rightarrow K^{+} \pi^{0}$ / LHCb Collaboration
A measurement of direct CP violation in the decay $B^{+} \rightarrow K^{+} \pi^{0}$ is reported using a data sample corresponding to an integrated luminosity of 5.4 $\textrm{fb}^{-1}$, collected with the LHCb experiment at a center-of-mass energy of $\sqrt{s}=13$ TeV. The CP asymmetry is measured to be $0.025 \pm 0.015 \pm 0.006 \pm 0.003$, where the uncertainties are statistical, systematic, and due to an external input, respectively. [...]
arXiv:2012.12789; LHCb-PAPER-2020-040; CERN-EP-2020-242.- 2021-03-02 - 11 p. - Published in : Phys. Rev. Lett. 126 (2021) 091802 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; supplementary information: ZIP;
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6.
Evidence of a $J/\psi\Lambda$ structure and observation of excited $\Xi^-$ states in the $\Xi^-_b \to J/\psi\Lambda K^-$ decay / LHCb Collaboration
First evidence of a structure in the $J/\psi \varLambda$ invariant mass distribution is obtained from an amplitude analysis of $\varXi_b^- \to J/\psi \varLambda K^-$ decays. The observed structure is consistent with being due to a charmonium pentaquark with strangeness. [...]
arXiv:2012.10380; LHCb-PAPER-2020-039; CERN-EP-2020-233.- 2021-07-15 - 21 p. - Published in : Sci. Bull. 66 (2021) 1278-1287 Fulltext: PDF; Fulltext from publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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7.
Measurement of $C\!P$ observables in $B^\pm \to D^{(*)} K^\pm$ and $B^\pm \to D^{(*)} \pi^\pm$ decays using two-body $D$ final states / LHCb Collaboration
Measurements of $C\!P$ observables in $B^\pm \rightarrow D^{(*)} K^\pm$ and $B^\pm \rightarrow D^{(*)} \pi^\pm$ decays are presented, where $D^{(*)}$ indicates a neutral $D$ or $D^*$ meson that is an admixture of meson and anti-meson states. Decays of the $D^*$ meson to the $D\pi^0$ and $D\gamma$ final states are partially reconstructed without inclusion of the neutral pion or photon. [...]
arXiv:2012.09903; LHCb-PAPER-2020-036; CERN-EP-2020-225; LHCB-PAPER-2020-036.- 2021-04-09 - 36 p. - Published in : JHEP 2104 (2021) 081 Article from SCOAP3: PDF; Fulltext: 2012.09903 - PDF; LHCb-PAPER-2020-036 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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8.
Observation of $CP$ violation in two-body $B_{(\mathrm{s})}^{\,0}$-meson decays to charged pions and kaons / LHCb Collaboration
The time-dependent $CP$ asymmetries of $B^0\to \pi^+\pi^-$ and $B^0_\mathrm{s}\!\to K^+K^-$ decays are measured using a data sample of $pp$ collisions corresponding to an integrated luminosity of 1.9 fb$^{-1}$, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. The results are \begin{eqnarray*} C_{\pi\pi} & = & -0.311 \pm 0.045 \pm 0.015, \newline S_{\pi\pi} & = & -0.706 \pm 0.042 \pm 0.013, \newline C_{KK} & = & \phantom{-}0.164 \pm 0.034 \pm 0.014, \newline S_{KK} & = & \phantom{-}0.123 \pm 0.034 \pm 0.015, \newline \cal {A}^{\Delta\Gamma}_{KK} & = & -0.83\phantom{0} \pm 0.05\phantom{0} \pm 0.09, \end{eqnarray*} where the first uncertainties are statistical and the second systematic. [...]
arXiv:2012.05319; LHCb-PAPER-2020-029; CERN-EP-2020-215; LHCB-PAPER-2020-029.- Geneva : CERN, 2021-03-08 - 43 p. - Published in : JHEP 2103 (2021) 075 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary material: ZIP; External link: Previous draft version
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9.
Amplitude analysis of the $B^+ \to D^+ D^- K^+$ decay / LHCb Collaboration
Results are reported from an amplitude analysis of the $B^+\to D^+D^-K^+$ decay. The analysis is carried out using LHCb proton-proton collision data taken at $\sqrt{s}=7,8,$ and $13$ TeV, corresponding to a total integrated luminosity of 9 fb$^{-1}$. [...]
arXiv:2009.00026; LHCb-PAPER-2020-025; CERN-EP-2020-159.- 2020-12-07 - 48 p. - Published in : Phys. Rev. D 102 (2020) 112003 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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10.
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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