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Home > Research > Publications & Outputs > Measurement of the mass of the Λb baryon
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Measurement of the mass of the Λb baryon

Research output: Contribution to journalJournal article

Published

Journal publication date1996
JournalPhysics Letters B
Journal number3-4
Volume380
Number of pages11
Pages442-452
Original languageEnglish

Abstract

In a data sample of four million hadronic Z decays collected with the ALEPH detector at LEP, four Λb baryon candidates are exclusively reconstructed in the Λb → Λc+π− channel, with the Λc+ decaying into pK−π+, , or Λπ+π+π−. The probability of the observed signal to be due to a background fluctuation is estimated to be 4.2 × 10−4. The mass of the Λb is measured to be 5614±21 (stat.) ± 4 (syst.) MeV/c2.