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CERN Document Server 293 records found  1 - 10próximoend  jump to record: Search took 0.95 seconds. 
1.
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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2.
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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3.
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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4.
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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5.
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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6.
Measurement of the CKM angle $\gamma$ and $B_s^0-\overline{B_s^0}$ mixing frequency with $B_s^0 \to D_s^{\mp} h^{\pm} \pi^{\pm}\pi^{\mp}$ decays / LHCb Collaboration
The CKM angle $\gamma$ is measured for the first time from mixing-induced $CP$ violation between $B^0_s \rightarrow D_s^\mp K^\pm \pi^\pm \pi^\mp$ and $\bar{B}^0_s \rightarrow D_s^\pm K^\mp \pi^\mp \pi^\pm$ decays reconstructed in proton-proton collision data corresponding to an integrated luminosity of 9 ${\rm fb}^{-1}$ recorded with the LHCb detector. A time-dependent amplitude analysis is performed to extract the $CP$-violating weak phase $\gamma-2\beta_s$ and, subsequently, $\gamma$ by taking the $B^0_s$-$\bar{B}^0_s$ mixing phase $\beta_{s}$ as an external input. [...]
arXiv:2011.12041; LHCb-PAPER-2020-030; CERN-EP-2020-214; LHCB-PAPER-2020-030.- Geneva : CERN, 2021-03-15 - 46 p. - Published in : JHEP 2103 (2021) 137 Article from SCOAP3: PDF; Fulltext: LHCb-PAPER-2020-030_arxiv - PDF; 2011.12041 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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7.
Observation of a new excited $D_s^+$ meson in $B^0$ to $D^- D^+ K^+ \pi^-$ decays / LHCb Collaboration
Using $pp$ collision data corresponding to an integrated luminosity of $5.4\,{\rm fb}^{-1}$ collected with the LHCb detector at a center-of-mass energy of $13\,{\rm TeV}$, the $B^0\to D^-D^+K^+\pi^-$ decay is studied. A new excited $D_s^+$ meson is observed decaying into the $D^+K^+\pi^-$ final state with large statistical significance. [...]
arXiv:2011.09112; CERN-EP-2020-203; LHCb-PAPER-2020-034; LHCB-PAPER-2020-034.- Geneva : CERN, 2021-03-27 - 11 p. - Published in : Phys. Rev. Lett. 126 (2021) 122002 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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8.
Search for the rare decay $B^0 \to J/\psi\phi$ / LHCb Collaboration
A search for the rare decay $B^{0} \rightarrow J/\psi \phi$ is performed using $pp$ collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 ${\rm fb}^{-1}$. No significant signal of the decay is observed and an upper limit of $1.1 \times 10^{-7}$ at 90% confidence level is set on the branching fraction..
arXiv:2011.06847; LHCb-PAPER-2020-033; CERN-EP-2020-204; LHCB-PAPER-2020-033.- 2021-03-18 - 14 p. - Published in : Chin. Phys. C 45 (2021) 043001 Fulltext: PDF; Fulltext from publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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9.
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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10.
Study of $B_s^0 \to J/\psi \pi^+ \pi^- K^+ K^-$ decays / LHCb Collaboration
The decays $B^0_s \rightarrow J/\psi \pi^+\pi^- K^+ K^-$ are studied using a data set corresponding to an integrated luminosity of 9 fb$^{-1}$, collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The decays $B^0_s \rightarrow J/\psi K^{\ast0} \bar{K}^{\ast0}$ and $B^0_s \rightarrow \chi_{c1}(3872)K^+K^-$, where the $K^+K^-$ pair does not originate from a $\phi$ meson, are observed for the first time [...]
arXiv:2011.01867; LHCb-PAPER-2020-35; CERN-EP-2020-192; LHCB-PAPER-2020-035.- Geneva : CERN, 2021-02-02 - 34 p. Article from SCOAP3: PDF; Fulltext: 2011.01867 - PDF; LHCb-PAPER-2020-035 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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Veja também: nomes de autores similares
3 Schmelzer, T
17 Schmelzer, T.
1 Schmelzer, Thiemo
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