Study of Λ0b and Ξ0b decays to Λh+h′− and evidence for CP violation in Λ0b →ΛK+K− decays
A study of Λ0𝑏 and Ξ0𝑏 decays to Λℎ+ℎ′− (ℎ(′)=𝜋,𝐾) is performed using 𝑝𝑝 collision data collected by the LHCb experiment during LHC Runs 1-2, corresponding to an integrated luminosity of 9 fb−1. The branching fractions for these decays are measured using the Λ0𝑏→Λ+𝑐(→Λ𝜋+)𝜋− decay as a control...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
12 March, 2025
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| In: |
Physical review letters
Year: 2025, Volume: 134, Issue: 10, Pages: 1-16 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.134.101802 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevLett.134.101802 Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.134.101802 
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| Author Notes: | R. Aaij et al.* (LHCb Collaboration) |
MARC
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| 245 | 1 | 0 | |a Study of Λ0b and Ξ0b decays to Λh+h′− and evidence for CP violation in Λ0b →ΛK+K− decays |c R. Aaij et al.* (LHCb Collaboration) |
| 246 | 3 | 3 | |a Study of Λ 0 b and Ξ 0 b decays to Λh + h ′ − and evidence for CP violation in Λ 0 b → ΛK + K − decays |
| 246 | 3 | 3 | |a Study of Lambda 0 b and Xi 0 b decays to Lambda h plus h ′ minus and evidence for CP violation in Lambda 0 b → Lambda K plus K minuis decays |
| 264 | 1 | |c 12 March, 2025 | |
| 300 | |b Diagramme | ||
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| 500 | |a Im Titel ist "0" , "+" und "-" jeweils hochgestellt - und der Buchstabe "b" jeweils tiefgestellt | ||
| 500 | |a LHCb Collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, C. Cocha Toapaxi, M. De Cian, L. Dittmann, S. Esen, F.C. Glaser, P.A. Günther, X. Han, S. Hansmann-Menzemer, P. Herrero Gascón, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, S.R. Roy, M. Ruiz Diaz, M.D. Tat, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, Y. Zhao, A. Zhelezov [und viele weitere] | ||
| 500 | |a Gesehen am 13.01.2026 | ||
| 520 | |a A study of Λ0 and Ξ0 decays to Λℎ+ℎ′− (ℎ(′)=,) is performed using collision data collected by the LHCb experiment during LHC Runs 1-2, corresponding to an integrated luminosity of 9 fb−1. The branching fractions for these decays are measured using the Λ0→Λ+(→Λ+)− decay as a control channel. The decays Λ0 →Λ+− and Ξ0 →Λ−+ are observed for the first time. For decay modes with sufficient signal yields, asymmetries are measured in the full and localized regions of the final-state phase space. Evidence is found for violation in the Λ0 →Λ+− decay, interpreted as originating primarily from an asymmetric Λ0 →*+− decay amplitude. The measured asymmetries for other decays are compatible with zero. | ||
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