Precision measurement of the Λb0 baryon lifetime


Aaij R., Adeva B., Adinolfi M., Adrover C., Affolder A., Ajaltouni Z., ...Daha Fazla

Physical Review Letters, cilt.111, sa.10, 2013 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 111 Sayı: 10
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1103/physrevlett.111.102003
  • Dergi Adı: Physical Review Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Manisa Celal Bayar Üniversitesi Adresli: Evet

Özet

The ratio of the Λb0 baryon lifetime to that of the B ̄0 meson is measured using 1.0 fb-1 of integrated luminosity in 7 TeV center-of-mass energy pp collisions at the LHC. The Λb0 baryon is observed for the first time in the decay mode Λb0→J/ψpK-, while the B̄0 meson decay used is the well known B̄0→J/ψπ+K - mode, where the π+K- mass is consistent with that of the K̄*0(892) meson. The ratio of lifetimes is measured to be 0.976±0.012±0.006, in agreement with theoretical expectations based on the heavy quark expansion. Using previous determinations of the B̄0 meson lifetime, the Λb0 lifetime is found to be 1.482±0.018±0.012 ps. In both cases, the first uncertainty is statistical and the second systematic. © 2013 CERN, for the LHCb Collaboration Published by the American Physical Society under the terms of the http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.