Observation of Λ0b → ψ(2S)pK− and Λ0b → J/ψπ + π −pK− decays and a measurement of the Λ0b baryon mass
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| Title: | Observation of Λ0b → ψ(2S)pK− and Λ0b → J/ψπ + π −pK− decays and a measurement of the Λ0b baryon mass |
| Author: | LHCb Collaboration Adeva Andany, Bernardo Borsato, Martino Dosil Suárez, Álvaro Fernández Albor, Víctor Manuel Gallas Torreira, Abraham Antonio García Pardiñas, Julián Hernando Morata, José Ángel Lemos Cid, Edgar Lucio Martínez, Miriam Martínez Santos, Diego Plo Casasus, Máximo Prisciandaro, Jessica Ramos Pernas, Miguel Romero Vidal, Antonio Saborido Silva, Juan José Sanmartín Sedes, Brais Santamarina Ríos, Cibrán Vázquez Regueiro, Pablo Vázquez Sierra, Carlos Vieites Díaz, María |
| Affiliation: | Universidade de Santiago de Compostela. Departamento de Física de Partículas Universidade de Santiago de Compostela. Instituto Galego de Física de Altas Enerxías (IGFAE) |
| Subject: | B physics | Flavor physics | Hadron-Hadron scattering (experiments) | Particle and resonance production | Spectroscopy | |
| Date of Issue: | 2016 |
| Publisher: | Springer |
| Citation: | Aaij, R., Abellán Beteta, C., Adeva, B. et al. Observation of Λ0b → ψ(2S)pK− and Λ0b → J/ψπ + π −pK− decays and a measurement of the Λ0b baryon mass. J. High Energ. Phys. 2016, 132 (2016). https://doi.org/10.1007/JHEP05(2016)132 |
| Abstract: | The decays Λ0b → ψ(2S)pK− and Λ0b → J/ψπ + π −pK− are observed in a data sample corresponding to an integrated luminosity of 3 fb−1, collected in proton-proton collisions at 7 and 8 TeV centre-of-mass energies by the LHCb detector. The ψ(2S) mesons are reconstructed through the decay modes ψ(2S) → μ+μ− and ψ(2S) → J/ψπ + π −. The branching fractions relative to that of Λ0b → J/ψpK− are measured to be B(Λ0b→ψ(2S)pK−)B(Λ0b→J/ψpK−)=(20.70±0.76±0.46±0.37)×10−2, where the first uncertainties are statistical, the second are systematic and the third is related to the knowledge of J/ψ and ψ(2S) branching fractions. The mass of the Λ 0b baryon is measured to be M(Λ0b)=5619.65±0.17±0.17 MeV/c2, where the uncertainties are statistical and systematic. |
| Publisher version: | https://doi.org/10.1007/JHEP05(2016)132 |
| URI: | http://hdl.handle.net/10347/22473 |
| DOI: | 10.1007/JHEP05(2016)132 |
| ISSN: | 1029-8479 |
| Rights: | © CERN, for the benefit of the LHCb Collaboration. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
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Except where otherwise noted, this item's license is described as © CERN, for the benefit of the LHCb Collaboration. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.