Observation of Λ<i><sub>b</sub></i><SUP>0</SUP> → <i>D</i><SUP>+</SUP><i>p</i>π<SUP>-</SUP>π<SUP>-</SUP> and Λ<i><sub>b</sub></i><SUP>0</SUP> → <i>D</i><sub>*</sub>+<i>p</i>π<SUP>-</SUP>π<SUP>-</SUP> decays



Aaij, R, Abdelmotteleb, ASW, Beteta, C Abellan, Abudinen, F, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Agapopoulou, C, Aidala, CA
et al (show 1000 more authors) (2022) Observation of Λ<i><sub>b</sub></i><SUP>0</SUP> → <i>D</i><SUP>+</SUP><i>p</i>π<SUP>-</SUP>π<SUP>-</SUP> and Λ<i><sub>b</sub></i><SUP>0</SUP> → <i>D</i><sub>*</sub>+<i>p</i>π<SUP>-</SUP>π<SUP>-</SUP> decays. JOURNAL OF HIGH ENERGY PHYSICS, 2022 (3). 153-.

Access the full-text of this item by clicking on the Open Access link.

Abstract

The multihadron decays $\Lambda_b^0\rightarrow D^+ p \pi^-\pi^-$ and $\Lambda_b^0\rightarrow D^{*+} p \pi^-\pi^-$ are observed in data corresponding to an integrated luminosity of 3fb$^{-1}$, collected in proton-proton collisions at centre-of-mass energies of 7 and 8TeV by the LHCb detector. Using the~decay $\Lambda_b^0\rightarrow \Lambda_c^+ \pi^+ \pi^-\pi^-$ as a normalisation channel, the ratio of branching fractions is measured to be $$ \frac { {\mathcal{B}} ( \Lambda_b^0\rightarrow D^+ p \pi^-\pi^- ) } { {\mathcal{B}} ( \Lambda_b^0\rightarrow \Lambda_c^+ \pi^+ \pi^-\pi^- ) } \times \frac { {\mathcal{B}} ( D^+ \rightarrow K^-\pi^+\pi^+) } { {\mathcal{B}} ( \Lambda_c^+ \rightarrow p K^-\pi^+ ) } = ( 5.35 \pm 0.21 \pm 0.16 ) \% \,, $$ where the first uncertainty is statistical and the second systematic. The ratio of branching fractions for $\Lambda_b^0\rightarrow D^{*+} p \pi^-\pi^-$ and $\Lambda_b^0\rightarrow D^+ p \pi^-\pi^-$ decays is found to be $$ \frac{ {\mathcal{B}} ( \Lambda_b^0\rightarrow D^{*+} p \pi^-\pi^- )} { {\mathcal{B}} ( \Lambda_b^0\rightarrow D^{+} p \pi^-\pi^- )} \times ( {\mathcal{B}}( D^{*+} \rightarrow \pi^0 ) + {\mathcal{B}}( D^{*+} \rightarrow \gamma )) = ( 61.3 \pm 4.3 \pm 4.0 ) \% \,. $$

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2021-040.html
Uncontrolled Keywords: B Physics, Branching fraction, Flavour Physics, Hadron-Hadron Scattering
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 16 May 2022 14:22
Last Modified: 14 Mar 2024 22:50
DOI: 10.1007/JHEP03(2022)153
Open Access URL: https://link.springer.com/article/10.1007/JHEP03(2...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3154905