${{\mathit \Lambda}_{{{b}}}^{0}}$ MEAN LIFE

INSPIRE   PDGID:
S040T
See ${{\mathit b}}$-baryon Admixture section for data on ${{\mathit b}}$-baryon mean life average over species of ${{\mathit b}}$-baryon particles.
VALUE ($ 10^{-12} $ s) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 1.471 \pm0.009}$ OUR EVALUATION  $~~$(Produced by HFLAV)
$1.477$ $\pm0.027$ $\pm0.009$ 1
SIRUNYAN
2018BY
 CMS ${{\mathit p}}{{\mathit p}}$ at 8 TeV
$1.415$ $\pm0.027$ $\pm0.006$ 2
AAIJ
2014E
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7 TeV
$1.479$ $\pm0.009$ $\pm0.010$ 3
AAIJ
2014U
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$1.565$ $\pm0.035$ $\pm0.020$ 2
AALTONEN
2014B
 CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
$1.449$ $\pm0.036$ $\pm0.017$ 2
AAD
2013U
 ATLS ${{\mathit p}}{{\mathit p}}$ at 7 TeV
$1.503$ $\pm0.052$ $\pm0.031$ 2
CHATRCHYAN
2013AC
 CMS ${{\mathit p}}{{\mathit p}}$ at 7 TeV
$1.303$ $\pm0.075$ $\pm0.035$ 2
ABAZOV
2012U
 D0 ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
$1.401$ $\pm0.046$ $\pm0.035$ 4
AALTONEN
2010B
 CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
• • We do not use the following data for averages, fits, limits, etc. • •
$1.482$ $\pm0.018$ $\pm0.012$ 5
AAIJ
2013BB
 LHCB Repl. by AAIJ 2014U
$1.537$ $\pm0.045$ $\pm0.014$ 2
AALTONEN
2011
CDF Repl. by AALTONEN 2014B
$1.218$ ${}^{+0.130}_{-0.115}$ $\pm0.042$ 2
ABAZOV
2007S
 D0 Repl. by ABAZOV 2012U
$1.290$ ${}^{+0.119}_{-0.110}$ ${}^{+0.087}_{-0.091}$ 6
ABAZOV
2007U
 D0 ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
$1.593$ ${}^{+0.083}_{-0.078}$ $\pm0.033$ 2
ABULENCIA
2007A
 CDF Repl. by AALTONEN 2011
$1.22$ ${}^{+0.22}_{-0.18}$ $\pm0.04$ 2
ABAZOV
2005C
 D0 Repl. by ABAZOV 2007S
$1.11$ ${}^{+0.19}_{-0.18}$ $\pm0.05$ 7
ABREU
1999W
 DLPH ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
$1.29$ ${}^{+0.24}_{-0.22}$ $\pm0.06$ 7
ACKERSTAFF
1998G
 OPAL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
$1.21$ $\pm0.11$ 7
BARATE
1998D
 ALEP ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
$1.32$ $\pm0.15$ $\pm0.07$ 8
ABE
1996M
 CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.8 TeV
$1.19$ ${}^{+0.21}_{-0.18}$ ${}^{+0.07}_{-0.08}$
ABREU
1996D
 DLPH Repl. by ABREU 1999W
$1.27$ ${}^{+0.35}_{-0.29}$ $\pm0.09$
ABREU
1995S
 DLPH Repl. by ABREU 1999W
$1.14$ ${}^{+0.22}_{-0.19}$ $\pm0.07$ 69
AKERS
1995K
 OPAL Repl. by ACKERSTAFF 1998G
$1.02$ ${}^{+0.23}_{-0.18}$ $\pm0.06$ 44
BUSKULIC
1995L
 ALEP Repl. by BARATE 1998D
1  Measured using ${{\mathit \Lambda}_{{{b}}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \Lambda}}$ decays.
2  Measured mean life using fully reconstructed ${{\mathit \Lambda}_{{{b}}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \Lambda}}$ decays.
3  Used ${{\mathit \Lambda}_{{{b}}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit p}}{{\mathit K}^{-}}$ decays.
4  Measured mean life using fully reconstructed ${{\mathit \Lambda}_{{{b}}}^{0}}$ $\rightarrow$ ${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit \pi}^{-}}$ decays.
5  Measured the lifetime ratio of decays ${{\mathit \Lambda}_{{{b}}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit p}}{{\mathit K}^{-}}$ to ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit K}^{-}}$ to be $0.976$ $\pm0.012$ $\pm0.006$ with ${\mathit \tau}_{{{\mathit B}^{0}}}$ = $1.519$ $\pm0.007$ ps.
6  Measured using semileptonic decays ${{\mathit \Lambda}_{{{b}}}^{0}}$ $\rightarrow$ ${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit \mu}}{{\mathit \nu}}{{\mathit X}}$ and ${{\mathit \Lambda}_{{{c}}}^{+}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit p}}$.
7  Measured using ${{\mathit \Lambda}_{{{c}}}}{{\mathit \ell}^{-}}$ and ${{\mathit \Lambda}}{{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$.
8  Excess ${{\mathit \Lambda}_{{{c}}}}{{\mathit \ell}^{-}}$, decay lengths.
References