Scientific article
Open access

Measurement of the Λb0 lifetime and mass in the ATLAS experiment

ContributorsATLAS Collaboration
Publication date2013

A measurement of the Λ0b lifetime and mass in the decay channel Λ0b→J/ψ(μ+μ−)Λ0(pπ−) is presented. The analysis uses a signal sample of about 2200 Λ0b and Λ0b decays that are reconstructed in 4.9  fb−1 of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the Λ0b lifetime and mass. They are measured to be τΛb=1.449±0.036(stat)±0.017(syst)  ps and mΛb=5619.7±0.7(stat)±1.1(syst)  MeV.

Citation (ISO format)
ATLAS Collaboration. Measurement of the Λ<sub>b</sub><sup>0</sup> lifetime and mass in the ATLAS experiment. In: Physical review. D. Particles, fields, gravitation, and cosmology, 2013, vol. 87, n° 03, p. 032002. doi: 10.1103/PhysRevD.87.032002
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Article (Published version)
ISSN of the journal1550-2368

Technical informations

Creation10/03/2014 9:09:00 AM
First validation10/03/2014 9:09:00 AM
Update time03/14/2023 9:49:01 PM
Status update03/14/2023 9:49:01 PM
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