Observation of Λb0 → D <sup>+</sup> pπ<sup>−</sup> π<sup>−</sup> and Λb0 → D <sup>*+</sup> pπ<sup>−</sup> π<sup>−</sup> decays
Authors
Aaij, R
Abdelmotteleb, ASW
Abellán Beteta, C
Abudinén, F
Ackernley, T
Adeva, B
Adinolfi, M
Afsharnia, H
Agapopoulou, C
Aidala, CA
Aiola, S
Ajaltouni, Z
Akar, S
Albrecht, J
Alessio, F
Alexander, M
Alfonso Albero, A
Aliouche, Z
Alkhazov, G
Alvarez Cartelle, P
Amato, S
Amey, JL
Amhis, Y
An, L
Anderlini, L
Andersson, M
Andreianov, A
Andreotti, M
Archilli, F
Artamonov, A
Artuso, M
Arzymatov, K
Aslanides, E
Atzeni, M
Audurier, B
Bachmann, S
Bachmayer, M
Back, JJ
Baladron Rodriguez, P
Balagura, V
Baldini, W
Baptista de Souza Leite, J
Barbetti, M
Barlow, RJ
Barsuk, S
Barter, W
Bartolini, M
Baryshnikov, F
Basels, JM
Bashir, S
Bassi, G
Batsukh, B
Battig, A
Bay, A
Beck, A
Becker, M
Bedeschi, F
Bediaga, I
Beiter, A
Belavin, V
Belin, S
Bellee, V
Belous, K
Belov, I
Bencivenni, G
Ben-Haim, E
Berezhnoy, A
Bernet, R
Berninghoff, D
Bernstein, HC
Bertella, C
Bertolin, A
Betancourt, C
Betti, F
Bezshyiko, I
Bhasin, S
Bhom, J
Bian, L
Bieker, MS
Biesuz, NV
Bifani, S
Billoir, P
Biolchini, A
Birch, M
Bishop, FCR
Bitadze, A
Bizzeti, A
Bjørn, M
Blago, MP
Blake, T
Blanc, F
Blusk, S
Bobulska, D
Boelhauve, JA
Boente Garcia, O
Boettcher, T
Boldyrev, A
Bondar, A
Bondar, N
Publication Date
2022Journal Title
Journal of High Energy Physics
ISSN
1029-8479
Publisher
Springer
Volume
2022
Issue
3
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Aaij, R., Abdelmotteleb, A., Abellán Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., et al. (2022). Observation of Λb0 → D <sup>+</sup> pπ<sup>−</sup> π<sup>−</sup> and Λb0 → D <sup>*+</sup> pπ<sup>−</sup> π<sup>−</sup> decays. Journal of High Energy Physics, 2022 (3) https://doi.org/10.1007/JHEP03(2022)153
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 $$ \frac{ {\mathcal{B}} (
\Lambda_b^0\rightarrow D^{*+} p \pi^-\pi^- )}
{ {\mathcal{B}} ( \Lambda_b^0\rightarrow D^{+} p \pi^-\pi^- )}
\times
(
{\mathcal{B}}( D^{*+} \rightarrow \pi^0 ) +
{\mathcal{B}}( D^{*+} \rightarrow \gamma ))
= ( 61.3 \pm 4.3 \pm 4.0 ) \% \,. $$
Keywords
B Physics, Branching fraction, Flavour Physics, Hadron-Hadron Scattering
Identifiers
jhep03(2022)153, 18046
External DOI: https://doi.org/10.1007/JHEP03(2022)153
This record's URL: https://www.repository.cam.ac.uk/handle/1810/338517
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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