Isospin amplitudes in [lambda]0b → J/[psi lambda] ([sigma]0) and [xi]0b → J/[psi xi]0 ([lambda]) decays
Ratios of isospin amplitudes in hadron decays are a useful probe of the interplay between weak and strong interactions and allow searches for physics beyond the standard model. We present the first results on isospin amplitudes in b-baryon decays, using data corresponding to an integrated luminosity...
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| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
17 March 2020
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| In: |
Physical review letters
Year: 2020, Volume: 124, Issue: 11 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.124.111802 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.124.111802 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.124.111802 
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| Author Notes: | R. Aaij et al. (LHCb Collaboration)* |
MARC
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| 245 | 1 | 0 | |a Isospin amplitudes in [lambda]0b → J/[psi lambda] ([sigma]0) and [xi]0b → J/[psi xi]0 ([lambda]) decays |c R. Aaij et al. (LHCb Collaboration)* |
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| 246 | 3 | 3 | |a Isospin amplitudes in [lambda] zero b into J/[psi lambda] ([sigma] zero) and [xi] zero b into J/[psi xi] zero ([lambda]) decays |
| 246 | 3 | 3 | |a Isospin amplitudes in [lambda] 0 b → J/[psi lambda] ([sigma] 0) and [xi] 0 b → J/[psi xi] 0 ([lambda]) decays |
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| 500 | |a Im Titel sind lambda, psi, sigma und xi als griechische Buchstaben dargestellt | ||
| 500 | |a Im Titel ist die Ziffer "0" hochgestellt und der Buchstabe b tiefgestellt | ||
| 500 | |a LHCb Collaboration*: Roel Aaij, Flavio Archilli, Sebastian Bachmann, Daniel Berninghoff, Martino Borsato, David Gerick, Jascha Grabowski, Paul André Günther, Xiaoxue Han, Stephanie Hansmann-Menzemer, Jiangqiao Hu, Renata Kopecná, Blake Leverington, Hanna Malygina, Jörg Marks, Alessio Piucci, Ulrich Uwer, Lukas Witola, Alexey Zhelezov [und 889 weitere] | ||
| 500 | |a Gesehen am 30.09.2020 | ||
| 520 | |a Ratios of isospin amplitudes in hadron decays are a useful probe of the interplay between weak and strong interactions and allow searches for physics beyond the standard model. We present the first results on isospin amplitudes in b-baryon decays, using data corresponding to an integrated luminosity of 8.5 fb−1, collected with the LHCb detector in pp collisions at center of mass energies of 7, 8, and 13 TeV. The isospin amplitude ratio |A1(Λ0b→J/ψΣ0)/A0(Λ0b→J/ψΛ)|, where the subscript on A indicates the final-state isospin, is measured to be less than 1/21.8 at 95% confidence level. The Cabibbo suppressed Ξ0b→J/ψΛ decay is observed for the first time, allowing for the measurement |A0(Ξ0b→J/ψΛ)/A1/2(Ξ0b→J/ψΞ0)|=0.37±0.06±0.02, where the uncertainties are statistical and systematic, respectively. | ||
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