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Measurement of branching fractions and CP asymmetries in [Lambda]0b ([Xi]0b) → pK0Sh− decays

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A study of $$ {\Lambda}_b^0 $$and $$ {\Xi}_b^0 $$baryon decays to the final states $$ p{K}_{\textrm{S}}^0{\pi}^{-} $$and $$ p{K}_{\textrm{S}}^0{K}^{-} $$is performed using pp collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. The decays $$ {\Lambda}...

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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) , Dittmann, Lucas (Author) , Esen, Sevda (Author) , Glaser, Fabian (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Herrero Gascón, Paula (Author) , Langenbruch, Christoph (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Morgenthaler, Maurice Pierre (Author) , Roy, Shreya (Author) , Ruiz Diaz, Miguel (Author) , Schiller, Manuel (Author) , Tat, Martin Duy (Author) , Tuci, Giulia (Author) , Uecker, Lennart Henning (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Wang, Chishuai (Author) , Wolf, Thomas (Author) , Zhao, Ya (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 21 October 2025
In: Journal of high energy physics
Year: 2025, Issue: 10, Pages: 1-28
ISSN:1029-8479
DOI:10.1007/JHEP10(2025)169
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1007/JHEP10(2025)169
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Author Notes:The LHCb collaboration*
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Summary:A study of $$ {\Lambda}_b^0 $$and $$ {\Xi}_b^0 $$baryon decays to the final states $$ p{K}_{\textrm{S}}^0{\pi}^{-} $$and $$ p{K}_{\textrm{S}}^0{K}^{-} $$is performed using pp collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. The decays $$ {\Lambda}_b^0\to p{K}_{\textrm{S}}^0{K}^{-} $$and $$ {\Xi}_b^0\to p{K}_{\textrm{S}}^0{K}^{-} $$are observed for the first time, with significances reaching eight standard deviations. The branching fractions and integrated CP asymmetries are measured for the $$ {\Lambda}_b^0\to p{K}_{\textrm{S}}^0{\pi}^{-} $$, $$ {\Lambda}_b^0\to p{K}_{\textrm{S}}^0{K}^{-} $$, and $$ {\Xi}_b^0\to p{K}_{\textrm{S}}^0{K}^{-} $$decays. For the decay $$ {\Lambda}_b^0\to p{K}_{\textrm{S}}^0{\pi}^{-} $$, the CP asymmetries are measured in different regions of the Dalitz plot. No evidence of CP violation is observed.
Item Description:Veröffentlicht: 21. Oktober 2025
*The LHCb collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, C. Cocha Toapaxi, L. Dittmann, S. Esen, F.C. Glaser, P.A. Günther, X. Han, S. Hansmann-Menzemer, P. Herrero Gascon, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, S.R. Roy, M. Ruiz Diaz, M. Schiller, M.D. Tat, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, T. Wolf, Y. Zhao, A. Zhelezov [und sehr viele weitere Personen]
Im Titel sind die Buchstaben b und S tiefgestellt sowie die Zahlen 0 und das Minuszeichen hochgestellt
Gesehen am 21.04.2026
Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP10(2025)169

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