Precision measurement of the ratio of the Λ b 0 to B ¯ 0 lifetimes
Name
1-s2.0-S0370269314003232-main.pdf
Description
Published version
Size
635.59 KB
Format
Unknown
Checksum (MD5)
367290ea1543e3f71433cc545435d8ca
Date Issued
May 2014
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publisher
Elsevier BV
Citation
Aaij, R., et al. "Precision Measurement of the Ratio of the ?b0 to B-0 Lifetimes." Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 734 (2014): 122-30.
Version
Final published version
Abstract
The LHCb measurement of the lifetime ratio of the Λb0 baryon to the B-0 meson is updated using data corresponding to an integrated luminosity of 3.0 fb-1 collected using 7 and 8 TeV centre-of-mass energy pp collisions at the LHC. The decay modes used are Λb0→J/ψpK- and B-0→J/ψπ+K-, where the π +K - mass is consistent with that of the K-*0(892) meson. The lifetime ratio is determined with unprecedented precision to be 0.974 ± 0.006 ± 0.004, where the first uncertainty is statistical and the second systematic. This result is in agreement with original theoretical predictions based on the heavy quark expansion. Using the current world average of the B-0 lifetime, the Λb0 lifetime is found to be 1.479 ± 0.009 ± 0.010ps. © 2014 The Authors.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 3.0 unported license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/J.PHYSLETB.2014.05.021
