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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/162199
First observation of the radiative decay Λb0 → Λγ
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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.
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LHCb Collaboration, et al. First observation of the radiative decay Λb0 → Λγ. Physical Review Letters. 2019. Vol. 123, num. 3, pags. 031801-031801. ISSN 0031-9007. [consulted: 5 of October of 2026]. Available at: https://hdl.handle.net/2445/162199