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http://hdl.handle.net/2445/162199| Title: | First observation of the radiative decay Λb0 → Λγ |
| Author: | LHCb Collaboration Alfonso Albero, Alejandro Calvo Gómez, Míriam Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Gironella Gironell, P. Graciani Díaz, Ricardo Graugés Pous, Eugeni Vilasis-Cardona, Xavier Marin Benito, Carla |
| Keywords: | Física de partícules Experiments Particle physics Experiments |
| Issue Date: | 15-Jul-2019 |
| Publisher: | American Physical Society |
| Abstract: | The radiative decay Λb0→Λγ is observed for the first time using a data sample of proton-proton collisions corresponding to an integrated luminosity of 1.7 fb-1 collected by the LHCb experiment at a center-of-mass energy of 13 TeV. Its branching fraction is measured exploiting the B0→K∗0γ decay as a normalization mode and is found to be B(Λb0→Λγ)=(7.1±1.5±0.6±0.7)×10-6, where the quoted uncertainties are statistical, systematic, and systematic from external inputs, respectively. This is the first observation of a radiative decay of a beauty baryon. |
| Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.123.031801 |
| It is part of: | Physical Review Letters, 2019, vol. 123, num. 3, p. 031801-031801 |
| URI: | http://hdl.handle.net/2445/162199 |
| Related resource: | https://doi.org/10.1103/PhysRevLett.123.031801 |
| ISSN: | 0031-9007 |
| Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
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| 696367.pdf | 334.88 kB | Adobe PDF | View/Open |
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