First Observation of the Radiative Decay Λ0b→Λγ

Robert Appleby; Silvia Borghi; Christopher Burr; Stefano De Capua; Deepanwita Dutta; Evelina Gersabeck; Marco Gersabeck; Lucia Grillo; Martha Hilton; George Lafferty; Andrew Mcnab; Christopher Parkes; Gediminas Sarpis; Mark Williams; The LHCb Collaboration

doi:10.1103/PhysRevLett.123.031801

First Observation of the Radiative Decay Λ0b→Λγ

Robert Appleby, Silvia Borghi, Christopher Burr, Stefano De Capua, Deepanwita Dutta, Evelina Gersabeck, Marco Gersabeck, Lucia Grillo, Martha Hilton, George Lafferty, Andrew Mcnab, Christopher Parkes, Gediminas Sarpis, Mark Williams, The LHCb Collaboration

Research output: Contribution to journal › Article › peer-review

Abstract

The radiative decay Λ0b→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(Λ0b→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.

Original language	English
Article number	132002
Journal	Physical Review Letters
Volume	123
Early online date	15 Jul 2019
DOIs	https://doi.org/10.1103/PhysRevLett.123.031801
Publication status	Published - 19 Jul 2019

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title = "First Observation of the Radiative Decay Λ0b→Λγ",

abstract = "The radiative decay Λ0b→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(Λ0b→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.",

author = "Robert Appleby and Silvia Borghi and Christopher Burr and {De Capua}, Stefano and Deepanwita Dutta and Evelina Gersabeck and Marco Gersabeck and Lucia Grillo and Martha Hilton and George Lafferty and Andrew Mcnab and Christopher Parkes and Gediminas Sarpis and Mark Williams and {The LHCb Collaboration}",

year = "2019",

month = jul,

day = "19",

doi = "10.1103/PhysRevLett.123.031801",

language = "English",

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journal = "Physical Review Letters",

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TY - JOUR

T1 - First Observation of the Radiative Decay Λ0b→Λγ

AU - Appleby, Robert

AU - Borghi, Silvia

AU - Burr, Christopher

AU - De Capua, Stefano

AU - Dutta, Deepanwita

AU - Gersabeck, Evelina

AU - Gersabeck, Marco

AU - Grillo, Lucia

AU - Hilton, Martha

AU - Lafferty, George

AU - Mcnab, Andrew

AU - Parkes, Christopher

AU - Sarpis, Gediminas

AU - Williams, Mark

AU - The LHCb Collaboration,

PY - 2019/7/19

Y1 - 2019/7/19

N2 - The radiative decay Λ0b→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(Λ0b→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.

AB - The radiative decay Λ0b→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(Λ0b→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.

U2 - 10.1103/PhysRevLett.123.031801

DO - 10.1103/PhysRevLett.123.031801

M3 - Article

SN - 0031-9007

VL - 123

JO - Physical Review Letters

JF - Physical Review Letters

M1 - 132002

ER -

First Observation of the Radiative Decay Λ0b→Λγ

Abstract

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