Please use this identifier to cite or link to this item:
Title: Precision measurement of the ratio of the Lambda(0)(b) to (B)over-bar(0) lifetimes
Author: Camboni, Alessandro
Comerma-Montells, A.
Garrido Beltrán, Lluís
Graciani Diaz, Ricardo
Graugés Pous, Eugeni
Marin Benito, Carla
Picatoste Olloqui, E.
Potterat, C.
Rives Molina, V.
Ruiz, Hugo
LHCb Collaboration
Keywords: Hadrons
Gran Col·lisionador d'Hadrons
Física de partícules
Large Hadron Collider (France and Switzerland)
Particle physics
Issue Date: Jun-2014
Publisher: Elsevier B.V.
Abstract: The LHCb measurement of the lifetime ratio of the Λ 0 b baryon to the B0 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 Λ 0 b → J/ψ pK− and B0 → J/ψ π+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 B0 lifetime, the Λ 0 b lifetime is found to be 1.479 ± 0.009 ± 0.010 ps.
Note: Reproducció del document publicat a:
It is part of: Physics Letters B, 2014, vol. 734, p. 122-130
Related resource:
ISSN: 0370-2693
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

Files in This Item:
File Description SizeFormat 
645758.pdf469.9 kBAdobe PDFView/Open

This item is licensed under a Creative Commons License Creative Commons