@article{10902/13901,
year = {2014},
month = {4},
url = {http://hdl.handle.net/10902/13901},
abstract = {We report on mass and lifetime measurements of several ground state charmed and bottom baryons, using a data sample corresponding to 9.6  fb−1 from p¯p collisions at √s=1.96  TeV and recorded with the Collider Detector at Fermilab. Baryon candidates are reconstructed from data collected with an online event selection designed for the collection of long-lifetime heavy-flavor decay products and a second event selection designed to collect J/ψ→μ+μ− candidates. First evidence for the process Ω−b→Ω0cπ− is presented with a significance of 3.3σ . We measure the following baryon masses:

M(Ξ0c)=2470.85±0.24(stat)±0.55(syst)  MeV/c2,
M(Ξ+c)=2468.00±0.18(stat)±0.51(syst)  MeV/c2,
M(Λb)=5620.15±0.31(stat)±0.47(syst)  MeV/c2,
M(Ξ−b)=5793.4±1.8(stat)±0.7(syst)  MeV/c2,
M(Ξ0b)=5788.7±4.3(stat)±1.4(syst)  MeV/c2, and
M(Ω−b)=6047.5±3.8(stat)±0.6(syst)  MeV/c2.

The isospin splitting of the Ξ−,0b states is found to be M(Ξ−b)−M(Ξ0b)=4.7±4.7(stat)±0.7(syst)  MeV/c2 . The isospin splitting of the Ξ0,+c states is found to be M(Ξ0c)−M(Ξ+c)=2.85±0.30(stat)±0.04(syst)  MeV/c2 . The following lifetime measurements are made:

τ(Λb)=1.565±0.035(stat)±0.020(syst)  ps,
τ(Ξ−b)=1.32±0.14(stat)±0.02(syst)  ps,
τ(Ω−b)=1.66+0.53−0.40(stat)±0.02(syst)  ps.},
organization = {We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto   Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada;the National Science Council of the Republic of China;   National Science Foundation; the A. P. Sloan Foundation; the Bundesministerium  für  Bildung und Forschung, Germany; the Korean World Class University Program, the National Research Foundation of Korea; the Science and Technology Facilities Council and the Royal Society, United Kingdom; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación,and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D Agency; the Academy of Finland; the AustralianResearch Council (ARC); and the EU community Marie Curie Fellowship Contract No. 302103.},
publisher = {American Physical Society},
publisher = {Phys. Rev. D, Vol. 89, Num. 7, Pag. 072014 (2014)},
title = {Mass and lifetime measurements of bottom and charm baryons in p¯p collisions at √s=1.96  TeV},
author = {Aaltonen, Timo Antero and Casal Laraña, Bruno and Cuevas Maestro, Francisco Javier and Gómez Gramuglio, Gervasio and Palencia Cortezón, José Enrique and Ruiz Jimeno, Alberto and Scodellaro, Luca and Vilar Cortabitarte, Rocío and Vizán García, Jesús Manuel},
}