${\mathit \tau}_{{{\mathit \Lambda}_{{{b}}}^{0}}}/{\mathit \tau}_{{{\mathit B}^{0}}}$ MEAN LIFE RATIO

${\mathit \tau}_{{{\mathit \Lambda}_{{{b}}}^{0}}}/{\mathit \tau}_{{{\mathit B}^{0}}}$ (direct measurements)

INSPIRE   PDGID:
S040TR
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 0.964 \pm0.007}$ OUR EVALUATION  $~~$(Produced by HFLAV)  See the ideogram below.
$\bf{ 0.970 \pm0.009}$ OUR AVERAGE  Error includes scale factor of 1.4.  See the ideogram below.
$0.978$ $\pm0.018$ $\pm0.006$ 1
SIRUNYAN
2018BY
 CMS ${{\mathit p}}{{\mathit p}}$ at 8 TeV
$0.929$ $\pm0.018$ $\pm0.004$ 1
AAIJ
2014E
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7 TeV
$0.974$ $\pm0.006$ $\pm0.004$ 2
AAIJ
2014U
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$0.960$ $\pm0.025$ $\pm0.016$ 3
AAD
2013U
 ATLS ${{\mathit p}}{{\mathit p}}$ at 7 TeV
$0.864$ $\pm0.052$ $\pm0.033$ 4, 5
ABAZOV
2012U
 D0 ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
$1.020$ $\pm0.030$ $\pm0.008$ 4
AALTONEN
2011
CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
• • We do not use the following data for averages, fits, limits, etc. • •
$0.976$ $\pm0.012$ $\pm0.006$ 6
AAIJ
2013BB
 LHCB Repl. by AAIJ 2014U
$0.811$ ${}^{+0.096}_{-0.087}$ $\pm0.034$ 4, 5
ABAZOV
2007S
 D0 Repl. by ABAZOV 2012U
$1.041$ $\pm0.057$ 7
ABULENCIA
2007A
 CDF Repl. by AALTONEN 2011
$0.87$ ${}^{+0.17}_{-0.14}$ $\pm0.03$ 7
ABAZOV
2005C
 D0 Repl. by ABAZOV 2007S
1  Measured using ${{\mathit \Lambda}_{{{b}}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \Lambda}}$ and ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}^{*}{(892)}^{0}}$ decays.
2  Used ${{\mathit \Lambda}_{{{b}}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit p}}{{\mathit K}^{-}}$ and ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}^{*}{(892)}^{0}}$ decays.
3  Measured with ${{\mathit \Lambda}_{{{b}}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}({{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$) ${{\mathit \Lambda}^{0}}({{\mathit p}}{{\mathit \pi}^{-}}$) decays.
4  Uses fully reconstructed ${{\mathit \Lambda}_{{{b}}}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \Lambda}}$ decays.
5  Uses ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}_S^0}$ decays for denominator.
6  Measures 1/${\mathit \tau}_{{{\mathit \Lambda}_{{{b}}}^{0}}}$ $−$ 1/${\mathit \tau}_{{{\mathit B}^{0}}}$ and uses ${\mathit \tau}_{{{\mathit B}^{0}}}$ = $1.519$ $\pm0.007$ ps to extract lifetime ratio.
7  Measured mean life ratio using fully reconstructed decays.

           ${\mathit \tau}_{{{\mathit \Lambda}_{{{b}}}^{0}}}/{\mathit \tau}_{{{\mathit B}^{0}}}$ (direct measurements)
References