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First observation of Ξ› 0𝑏 β†’ Ξ£([ast])𝑐⁒𝐷([ast])βˆ’πΎβˆ’ decays

The four decays, Ξ›0𝑏 β†’Ξ£(*)𝑐⁒𝐷(*)βˆ’β’πΎβˆ’, are observed for the first time using proton-proton collision data collected with the LHCb detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6  fbβˆ’1. By considering the Ξ›0𝑏 β†’Ξ›+𝑐⁒¯𝐷0β’πΎβˆ’ decay as reference channel, the fol...

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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Carus, Leon (Author) , Caspary, Rowina (Author) , Celani, Sara (Author) , Cocha Toapaxi, Carlos (Author) , De Cian, Michel (Author) , Dittmann, Lucas (Author) , Esen, Sevda (Author) , Frau, Giulia (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Herrero Gascón, Paula (Author) , Hu, Jiangqiao (Author) , Langenbruch, Christoph (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Morgenthaler, Maurice Pierre (Author) , Pais, Preema (Author) , Roy, Shreya (Author) , Ruiz Diaz, Miguel (Author) , Tuci, Giulia (Author) , Uecker, Lennart Henning (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Wang, Chishuai (Author) , Witola, Lukas (Author) , Zhao, Ya (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal) Editorial
Language:English
Published: 2024
In: Physical review
Year: 2024, Volume: 110, Issue: 3, Pages: 1-13
ISSN:2470-0029
DOI:10.1103/PhysRevD.110.L031104
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.110.L031104
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.110.L031104
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Author Notes:R. Aaij et al. (LHCb Collaboration*)
Description
Summary:The four decays, Ξ›0𝑏 β†’Ξ£(*)𝑐⁒𝐷(*)βˆ’β’πΎβˆ’, are observed for the first time using proton-proton collision data collected with the LHCb detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6  fbβˆ’1. By considering the Ξ›0𝑏 β†’Ξ›+𝑐⁒¯𝐷0β’πΎβˆ’ decay as reference channel, the following branching fraction ratios are measured to be ℬ⁑(Ξ›0π‘β†’Ξ£π‘β’π·βˆ’β’πΎβˆ’)ℬ⁑(Ξ›0𝑏→Λ+𝑐⁒¯𝐷0β’πΎβˆ’)=0.282Β±0.016Β±0.016Β±.005,ℬ⁑(Ξ›0𝑏→Σ*π‘β’π·βˆ’β’πΎβˆ’)ℬ⁑(Ξ›0π‘β†’Ξ£π‘β’π·βˆ’β’πΎβˆ’)=0.460Β±0.052Β±0.028,ℬ⁑(Ξ›0𝑏→Σ𝑐⁒𝐷*βˆ’β’πΎβˆ’)ℬ⁑(Ξ›0π‘β†’Ξ£π‘β’π·βˆ’β’πΎβˆ’)=2.261Β±0.202Β±0.129Β±0.046,ℬ⁑(Ξ›0𝑏→Σ*++𝑐⁒𝐷*βˆ’β’πΎβˆ’)ℬ⁑(Ξ›0𝑏→Σ++π‘β’π·βˆ’β’πΎβˆ’)=0.896Β±0.137Β±0.066Β±0.018, where the first uncertainties are statistical, the second are systematic, and the third are due to uncertainties in the branching fractions of intermediate particle decays. These initial observations mark the beginning of pentaquark searches in these modes, with more datasets to become available following the LHCb upgrade.
Item Description:Gesehen am 30.06.2025
Veröffentlicht: 22. August 2024
*LHCb Collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, C. Cocha Toapaxi, M. De Cian, L. Dittmann, S. Esen, G. Frau, P.A. Günther, X. Han, S. Hansmann-Menzemer, P. Herrero Gascon, J. Hu, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, P.R. Pais, S.R. Roy, M. Ruiz Diaz, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, Y. Zhao, A. Zhelezov [und 1061 weitere Personen]
Im Titel sind die Zahl 0, [ast] sowie die Plus- und Minus-Zeichen hochgestellt und die Buchstaben b und c tiefgestellt
Im Titel ist [ast] als Tropfensternchen dargestellt
Physical Description:Online Resource
ISSN:2470-0029
DOI:10.1103/PhysRevD.110.L031104

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