<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "First observation of the decay $\\Lambda_b^0 \\rightarrow \\Lambda_c^+ \\bar{D}^{(\\ast)0} K^-$ in preparation of a pentaquark search in the $\\Lambda_c^+ \\bar{D}^{(\\ast)0}$ system at the LHCb experiment"^^ . "This thesis reports the first observation of the decays $\\Lambda_b^0 \\rightarrow \\Lambda_c^+ \\bar{D}^0 K^-$ and $\\Lambda_b^0 \\rightarrow \\Lambda_c^+ \\bar{D}^\\ast(2007)^0 K^-$ using data corresponding to an\r\nintegrated luminosity of 3 fb${}^-1$ collected at 7 and 8 TeV center-of-mass energies in proton-proton collisions with the LHCb detector. A future amplitude\r\nanalysis of these $\\Lambda_b^0$ decays allows to search the $\\Lambda_c^+ \\bar{D}^{(\\ast)0}$ system for resonant contributions from $P_c^+$ pentaquarks.\r\nTwo of which have been discovered in 2015 by the LHCb experiment in the J/$\\psi p$ system.\r\nObserving $P_c^+$ pentaquarks in the $\\Lambda_c^+ \\bar{D}^{(\\ast)0}$ system would allow for further insight to the nature of these resonances.\r\n\r\nIn addition, the measurement of the $\\Lambda_b^0 \\rightarrow \\Lambda_c^+ \\bar{D}^0 K^-$ and $\\Lambda_b^0 \\rightarrow \\Lambda_c^+ \\bar{D}^\\ast(2007)^0 K^-$ branching fractions relative to the decay $\\Lb\\to\\Lc\\Dsm$ is\r\nmade, resulting in \r\n\\begin{alignat}{1}\r\n\\frac{\\mathscr{B}(\\Lambda_b^0 \\rightarrow \\Lambda_c^+ \\bar{D}^0 K^-)}{\\mathscr{B}(\\Lambda_b^0 \\rightarrow \\Lambda_c^+ D_s^-)} &= \\left(14.04 \\pm 0.58 \\pm 0.33 \\pm 0.45 \\right)\\,\\% \\nonumber \\\\\r\n\\frac{\\mathscr{B}(\\Lambda_b^0 \\rightarrow \\Lambda_c^+ \\bar{D}^\\ast(2007)^0 K^-)}{\\mathscr{B}(\\Lambda_b^0 \\rightarrow \\Lambda_c^+ D_s^-)} &= \\left(43.5 \\pm 1.4 {}^{+1.2}_{-0.8} \\pm 1.4 \\right)\\,\\% \\nonumber \r\n\\end{alignat}\r\nThe first uncertainty is statistical, the second systematic and the third is due to the knowledge\r\nof the branching fractions of $D_s^- \\rightarrow K^- K^+ \\pi^-$ and $\\bar{D}^0 \\rightarrow K^+ \\pi^-$. It is shown that the obtained result agrees with previously measured $B\\rightarrow\r\nD\\bar{D}^{(\\ast)0} K^-$ branching fractions, as expected from the lowest order approximation of QCD factorisation.\r\n\r\nThe developed methods are integral components of the future amplitude analysis of $\\LbLcDzbstK$. These and further algorithms presented here were developed in\r\na modularised way to be applied to a variety of analyses at \\lhcb, in particular pentaquark searches."^^ . "2018" . . . . . . . "Marian"^^ . "Stahl"^^ . "Marian Stahl"^^ . . . . . . "First observation of the decay $\\Lambda_b^0 \\rightarrow \\Lambda_c^+ \\bar{D}^{(\\ast)0} K^-$ in preparation of a pentaquark search in the $\\Lambda_c^+ \\bar{D}^{(\\ast)0}$ system at the LHCb experiment (PDF)"^^ . . . "Lb2LcDzbKm_v1.0.pdf"^^ . . . "First observation of the decay $\\Lambda_b^0 \\rightarrow \\Lambda_c^+ \\bar{D}^{(\\ast)0} K^-$ in preparation of a pentaquark search in the $\\Lambda_c^+ \\bar{D}^{(\\ast)0}$ system at the LHCb experiment (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "First observation of the decay $\\Lambda_b^0 \\rightarrow \\Lambda_c^+ \\bar{D}^{(\\ast)0} K^-$ in preparation of a pentaquark search in the $\\Lambda_c^+ \\bar{D}^{(\\ast)0}$ system at the LHCb experiment (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "First observation of the decay $\\Lambda_b^0 \\rightarrow \\Lambda_c^+ \\bar{D}^{(\\ast)0} K^-$ in preparation of a pentaquark search in the $\\Lambda_c^+ \\bar{D}^{(\\ast)0}$ system at the LHCb experiment (Other)"^^ . . . . . . "preview.jpg"^^ . . . "First observation of the decay $\\Lambda_b^0 \\rightarrow \\Lambda_c^+ \\bar{D}^{(\\ast)0} K^-$ in preparation of a pentaquark search in the $\\Lambda_c^+ \\bar{D}^{(\\ast)0}$ system at the LHCb experiment (Other)"^^ . . . . . . "medium.jpg"^^ . . . "First observation of the decay $\\Lambda_b^0 \\rightarrow \\Lambda_c^+ \\bar{D}^{(\\ast)0} K^-$ in preparation of a pentaquark search in the $\\Lambda_c^+ \\bar{D}^{(\\ast)0}$ system at the LHCb experiment (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #25126 \n\nFirst observation of the decay $\\Lambda_b^0 \\rightarrow \\Lambda_c^+ \\bar{D}^{(\\ast)0} K^-$ in preparation of a pentaquark search in the $\\Lambda_c^+ \\bar{D}^{(\\ast)0}$ system at the LHCb experiment\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .