First Observation of the Radiative Decay Λ<i><sub>b</sub></i><SUP>0 </SUP>→ Λγ



Aaij, R, Beteta, C Abelln, Adeva, B, Adinolfi, M, Aidala, CA, Ajaltouni, Z, Akar, S, Albicocco, P, Albrecht, J, Alessio, F
et al (show 843 more authors) (2019) First Observation of the Radiative Decay Λ<i><sub>b</sub></i><SUP>0 </SUP>→ Λγ. PHYSICAL REVIEW LETTERS, 123 (3). 031801-.

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Abstract

The radiative decay Λ_{b}^{0}→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 B^{0}→K^{*0}γ decay as a normalization mode and is found to be B(Λ_{b}^{0}→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.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2019-010.html
Uncontrolled Keywords: LHCb Collaboration
Depositing User: Symplectic Admin
Date Deposited: 03 Sep 2019 15:19
Last Modified: 17 Oct 2023 09:03
DOI: 10.1103/PhysRevLett.123.031801
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3053324