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primary topic: 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

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
type: Article
abstract: 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 integrated 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 analysis of these $\Lambda_b^0$ decays allows to search the $\Lambda_c^+ \bar{D}^{(\ast)0}$ system for resonant contributions from $P_c^+$ pentaquarks. Two of which have been discovered in 2015 by the LHCb experiment in the J/$\psi p$ system. Observing $P_c^+$ pentaquarks in the $\Lambda_c^+ \bar{D}^{(\ast)0}$ system would allow for further insight to the nature of these resonances. In 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 made, resulting in \begin{alignat}{1} \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 \\ \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 \end{alignat} The first uncertainty is statistical, the second systematic and the third is due to the knowledge of 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 $B\rightarrow D\bar{D}^{(\ast)0} K^-$ branching fractions, as expected from the lowest order approximation of QCD factorisation. The developed methods are integral components of the future amplitude analysis of $\LbLcDzbstK$. These and further algorithms presented here were developed in a modularised way to be ap…
date: 2018
author list: authors
type: EPrint
type: DoctoralThesisEPrint
is part of: repository
has document: https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210116
has document: https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210117
has document: https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210118
has document: https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210119
has document: https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210120
has document: https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210121
subject: 530 Physik

https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210116
type: Document
label: 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)
has file: Lb2LcDzbKm_v1.0.pdf
has part: Lb2LcDzbKm_v1.0.pdf

Marian Stahl
type: Person
given name: Marian
family name: Stahl

https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210117
type: Document
label: 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)
is version of: https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210116
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is index codes version of: https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210116
has file: indexcodes.txt
has part: indexcodes.txt

https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210118
type: Document
label: 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)
is version of: https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210116
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https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210119
type: Document
label: 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)
is version of: https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210116
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has file: preview.jpg
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https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210120
type: Document
label: 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)
is version of: https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210116
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https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210121
type: Document
label: 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)
is version of: https://archiv.ub.uni-heidelberg.de/volltextserver/id/document/210116
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https://archiv.ub.uni-heidelberg.de/volltextserver/25126/
title: HTML Summary of #25126 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
format: text/html
primary topic: 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

530 Physik
type: Concept
preferred label: 530 Physics @en