Measurement of the $\Xi_b^-$ and $\Omega_b^-$ baryon lifetimes
R. Aaij
,
Ziad Zj Ajaltouni
(1)
,
M. Baalouch
(1)
,
E. Cogneras
(1)
,
O. Deschamps
(1)
,
I. El Rifai
(1)
,
M. Grabalosa Gándara
(1)
,
Pierre Henrard
(1)
,
M. Hoballah
(1)
,
R. Lefèvre
(1)
,
J. Maratas
(1)
,
S. Monteil
(1)
,
V. Niess
(1)
,
Pascal Perret
(1)
,
Diego Alejandro Roa Romero
(1)
,
Y. Amhis
(2)
,
S. Barsuk
(2)
,
M. Borsato
(2)
,
O. Callot
(2)
,
J. He
(2)
,
O. Kochebina
(2)
,
J. Lefrançois
(2)
,
F. Machefert
(2)
,
A. Martin Sanchez
(2)
,
M. Nicol
(2)
,
P. Robbe
(2)
,
M.-H. Schune
(2)
,
M. Teklishyn
(2)
,
A. Vallier
(2)
,
B. Viaud
(2)
,
E. Aslanides
(3)
,
J. Cogan
(3)
,
W. Kanso
(3)
,
R. Legac
(3)
,
O. Leroy
(3)
,
G. Mancinelli
(3)
,
A. Mordà
(3, 4)
,
M. Perrin-Terrin
(3)
,
M. Sapunov
(3)
,
J. Serrano
(3)
,
A. Tsaregorodtsev
(3)
,
D. Decamp
(5)
,
N. Déléage
(5)
,
Ph. Ghez
(5)
,
J.-P. Lees
(5)
,
J.F. Marchand
(5)
,
M.-N. Minard
(5)
,
B. Pietrzyk
(5)
,
W. Qian
(5)
,
S. t'Jampens
(5)
,
V. Tisserand
(5)
,
E. Tournefier
(5)
R. Aaij
- Function : Author
Ziad Zj Ajaltouni
- Function : Author
- PersonId : 903794
E. Cogneras
- Function : Author
- PersonId : 743220
- IdHAL : eric-cogneras
- ORCID : 0000-0002-8933-9427
O. Deschamps
- Function : Author
- PersonId : 12089
- IdHAL : olivier-deschamps
- ORCID : 0000-0002-7047-6042
- IdRef : 161447368
Pierre Henrard
- Function : Author
- PersonId : 829303
M. Hoballah
- Function : Author
- PersonId : 1174785
- IdHAL : mostafa-adam-hoballah-hobart
- ORCID : 0000-0002-9018-1639
Pascal Perret
- Function : Author
- PersonId : 739797
- IdHAL : pascal-perret
- ORCID : 0000-0002-5732-4343
Diego Alejandro Roa Romero
- Function : Author
- PersonId : 769524
- IdRef : 172096839
J. He
- Function : Author
- PersonId : 756138
- ORCID : 0000-0001-8179-417X
J. Cogan
- Function : Author
- PersonId : 750510
- IdHAL : julien-cogan
- ORCID : 0000-0001-7194-7566
- IdRef : 078779014
O. Leroy
- Function : Author
- PersonId : 171866
- IdHAL : olivier-leroy
- ORCID : 0000-0002-2589-240X
- IdRef : 169871835
M. Perrin-Terrin
- Function : Author
- PersonId : 741779
- IdHAL : perrin-terrin
- ORCID : 0000-0002-3568-1956
- IdRef : 179269666
J. Serrano
- Function : Author
- PersonId : 175327
- IdHAL : justine-serrano
- ORCID : 0000-0003-2489-7812
- IdRef : 127525521
S. t'Jampens
- Function : Author
- PersonId : 736045
- IdHAL : stephane-tjampens
- ORCID : 0000-0003-4249-6641
Abstract
Using a data sample of pp collisions corresponding to an integrated luminosity of $3~ \rm fb^{-1}$, the $\Xi_b^-$ and $\Omega_b^-$ baryons are reconstructed in the $\Xi_b^- \rightarrow J/\psi \Xi^-$ and $\Omega_b^- \rightarrow J/\psi \Omega^-$ decay modes and their lifetimes measured to be $\tau (\Xi_b^-) = 1.55\, ^{+0.10}_{-0.09}~{\rm(stat)} \pm 0.03\,{\rm(syst)}$ ps, $\tau (\Omega_b^-) = 1.54\, ^{+0.26}_{-0.21}~{\rm(stat)} \pm 0.05\,{\rm(syst)}$ ps. These are the most precise determinations to date. Both measurements are in good agreement with previous experimental results and with theoretical predictions.