Measurement of the Λ0b lifetime and mass in the ATLAS experiment
| Authors |
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| Publication date | 2013 |
| Journal | Physical Review D. Particles, Fields, Gravitation, and Cosmology |
| Volume | Issue number | 87 | 3 |
| Pages (from-to) | 032002 |
| Number of pages | 19 |
| Organisations |
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| Abstract | 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 Λ¯¯0b 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. |
| Document type | Article |
| Note | ATLAS Collaboration |
| Language | English |
| Published at | https://doi.org/10.1103/PhysRevD.87.032002 |
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Measurement_of_the____0b_lifetime.pdf
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