First Observation of the Radiative Decay Λ b 0 → Λ γ

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Author(s)

The LHCb Collaboration; Boettcher, Thomas Julian; Craik, Daniel C; Weisser, Constantin; Williams, Michael

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Abstract

© 2019 CERN, for the LHCb Collaboration. 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.

Date issued

2019

URI

https://hdl.handle.net/1721.1/133325.2

Department

Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science

Journal

Physical Review Letters

Publisher

American Physical Society (APS)

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MIT Open Access Articles

Version	Item	Date	Summary
2	1721.1/133325.2*	2022-09-21T20:14:21Z	Metadata changed: Verified or entered author name and department authority metadata.
1	1721.1/133325	2021-10-27T19:52:08Z

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