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Measurement of the Lambda_b^0 lifetime using semileptonic decays.

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>2/11/2007
<mark>Journal</mark>Physical Review Letters
Issue number18
Pages (from-to)182001
<mark>Original language</mark>English


We report a measurement of the lifetime using a sample corresponding to 1.3 fb-1 of data collected by the D0 experiment in 2002–2006 during run II of the Fermilab Tevatron collider. The baryon is reconstructed via the decay µX. Using 4437±329 signal candidates, we measure the lifetime to be ()=1.290(stat)(syst) ps, which is among the most precise measurements in semileptonic decays. This result is in good agreement with the world average value.

Bibliographic note

Bertram was involved in the preparation of simulated signal samples and the muon trigger implementation. This is the most precise measurement of the Lambda_b^0 lifetime from a single experiment in the semileptonic mode and resolved a discrepancy between the measurement of the CDF collaboration and the World average value. RAE_import_type : Journal article RAE_uoa_type : Physics