#### ${{\mathit B}^{\pm}}$ MEAN LIFE

See ${{\mathit B}^{\pm}}$ /${{\mathit B}^{0}}$ /${{\mathit B}_{{s}}^{0}}$ /${{\mathit b}}$ -baryon ADMIXTURE section for data on ${{\mathit B}}$ -hadron mean life averaged over species of bottom particles. “OUR EVALUATION” is an average using rescaled values of the data listed below. The average and rescaling were performed by the Heavy Flavor Averaging Group (HFLAV) and are described at https://hflav.web.cern.ch/. The averaging/rescaling procedure takes into account correlations between the measurements and asymmetric lifetime errors.
VALUE ($10^{-12}$ s) EVTS DOCUMENT ID TECN  COMMENT
 $\bf{ 1.638 \pm0.004}$ OUR EVALUATION
$1.637$ $\pm0.004$ $\pm0.003$
 2014 E
LHCB ${{\mathit p}}{{\mathit p}}$ at 7 TeV
$1.639$ $\pm0.009$ $\pm0.009$ 1
 2011
CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
$1.663$ $\pm0.023$ $\pm0.015$ 2
 2011 B
CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
$1.635$ $\pm0.011$ $\pm0.011$ 3
 2005 B
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$1.624$ $\pm0.014$ $\pm0.018$ 4
 2004 E
DLPH ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
$1.636$ $\pm0.058$ $\pm0.025$ 5
 2002 C
CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.8 TeV
$1.673$ $\pm0.032$ $\pm0.023$ 6
 2001 F
BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$1.648$ $\pm0.049$ $\pm0.035$ 7
 2000 R
ALEP ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
$1.643$ $\pm0.037$ $\pm0.025$ 8
 1999 J
OPAL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
$1.637$ $\pm0.058$ ${}^{+0.045}_{-0.043}$ 7
 1998 Q
CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at $1.8$ TeV
$1.66$ $\pm0.06$ $\pm0.03$ 8
 1998 S
L3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
$1.66$ $\pm0.06$ $\pm0.05$ 8
 1997 J
SLD ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
$1.58$ ${}^{+0.21}_{-0.18}$ ${}^{+0.04}_{-0.03}$ 94 5
 1996 J
ALEP ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
$1.61$ $\pm0.16$ $\pm0.12$ 7, 9
 1995 Q
DLPH ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
$1.72$ $\pm0.08$ $\pm0.06$ 10
 1995
DLPH ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
$1.52$ $\pm0.14$ $\pm0.09$ 7
 1995 T
OPAL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$1.695$ $\pm0.026$ $\pm0.015$ 6
 2002 H
BELL Repl. by ABE 2005B
$1.68$ $\pm0.07$ $\pm0.02$ 5
 1998 B
CDF Repl. by ACOSTA 2002C
$1.56$ $\pm0.13$ $\pm0.06$ 7
 1996 C
CDF Repl. by ABE 1998Q
$1.58$ $\pm0.09$ $\pm0.03$ 11
 1996 J
ALEP ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
$1.58$ $\pm0.09$ $\pm0.04$ 7
 1996 J
ALEP Repl. by BARATE 2000R
$1.70$ $\pm0.09$ 12
 1995
DLPH ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
$1.61$ $\pm0.16$ $\pm0.05$ 148 5
 1994 D
CDF Repl. by ABE 1998B
$1.30$ ${}^{+0.33}_{-0.29}$ $\pm0.16$ 92 7
 1993 D
DLPH Sup. by ABREU 1995Q
$1.56$ $\pm0.19$ $\pm0.13$ 134 10
 1993 G
$1.51$ ${}^{+0.30}_{-0.28}$ ${}^{+0.12}_{-0.14}$ 59 7
 1993 C
OPAL Sup. by AKERS 1995T
$1.47$ ${}^{+0.22}_{-0.19}$ ${}^{+0.15}_{-0.14}$ 77 7
 1993 D
ALEP Sup. by BUSKULIC 1996J
 1 Measured mean life using fully reconstructed decays ( ${{\mathit J / \psi}}{{\mathit K}^{(*)}}$ ).
 2 Measured using ${{\mathit B}^{-}}$ $\rightarrow$ ${{\mathit D}^{0}}{{\mathit \pi}^{-}}$ with ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}$ events that were selected using a silicon vertex trigger.
 3 Measurement performed using a combined fit of $\mathit CP$-violation, mixing and lifetimes.
 4 Measurement performed using an inclusive reconstruction and ${{\mathit B}}$ flavor identification technique.
 5 Measured mean life using fully reconstructed decays.
 6 Events are selected in which one ${{\mathit B}}$ meson is fully reconstructed while the second ${{\mathit B}}$ $~$meson is reconstructed inclusively.
 7 Data analyzed using ${{\mathit D}}$ / ${{\mathit D}^{*}}{{\mathit \ell}}$ X event vertices.
 8 Data analyzed using charge of secondary vertex.
 9 ABREU 1995Q assumes B( ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit D}^{**-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{\mathit \ell}}}}}$ ) = $3.2$ $\pm1.7\%$.
 10 Data analyzed using vertex-charge technique to tag ${{\mathit B}}$ charge.
 11 Combined result of ${{\mathit D}}$ / ${{\mathit D}^{*}}{{\mathit \ell}}$ X analysis and fully reconstructed ${{\mathit B}}$ analysis.
 12 Combined ABREU 1995Q and ADAM 1995 result.
References:
 AAIJ 2014E
JHEP 1404 114 Measurements of the ${{\mathit B}^{+}}$ ,${{\mathit B}^{0}}$ ,${{\mathit B}_{{s}}^{0}}$ Meson and ${{\mathit \Lambda}_{{b}}^{0}}$ Baryon Lifetimes
 AALTONEN 2011B
PR D83 032008 Measurement of the ${{\mathit B}^{-}}$ Lifetime using a Simulation Free Approach for Trigger Bias Correction
 AALTONEN 2011
PRL 106 121804 Measurement of ${\mathit {\mathit b}}$ Hadron Lifetimes in Exclusive Decays Containing a ${{\mathit J / \psi}}$ in ${{\mathit p}}{{\overline{\mathit p}}}$ Collisions at $\sqrt {s }$ = 1.96 TeV
 ABE 2005B
PR D71 072003 Improved Measurement of $\mathit CP$ Violation Parameters sin2$\phi _{1}$ and $\vert {{\mathit \lambda}}$ $\vert$, ${{\mathit B}}$ Meson Lifetimes, and ${{\mathit B}^{0}}$ $−{{\overline{\mathit B}}^{0}}$ Mixing Parameter $\Delta {{\mathit m}_{{d}}}$
 Also
PR D71 079903 (errat.) Publisher's Note to ABE 2005B. Improved Measurement of $\mathit CP$ Violation Parameters sin2$\phi _{1}$ and $\vert \lambda \vert$, ${{\mathit B}}$ Meson Lifetimes, and ${{\mathit B}^{0}}$ $−{{\overline{\mathit B}}^{0}}$ Mixing Parameter $\Delta {\mathit m}_{{{\mathit d}}}$
 ABDALLAH 2004E
EPJ C33 307 A Precise Measurement of the ${{\mathit B}^{+}}$ , ${{\mathit B}^{0}}$ and Mean b-hadron Lifetime with the DELPHI Detector at LEP I
 ABE 2002H
PRL 88 171801 Precise Measurement of ${{\mathit B}}$ Meson Lifetimes with Hadronic Decay Final States
 ACOSTA 2002C
PR D65 092009 Measurement of ${{\mathit B}}$ Meson Lifetimes using Fully Reconstructed ${{\mathit B}}$ Decays Produced in ${{\mathit p}}{{\overline{\mathit p}}}$ Collisions at $\sqrt {s }$ = 1.8 TeV
 AUBERT 2001F
PRL 87 201803 Measurement of the ${{\mathit B}^{0}}$ and ${{\mathit B}^{+}}$ Meson Lifetimes with Fully Reconstructed Hadronic Final States
 BARATE 2000R
PL B492 275 Measurement of the ${{\overline{\mathit B}}^{0}}$ and ${{\mathit B}^{-}}$ Meson Lifetimes
 ABBIENDI 1999J
EPJ C12 609 Measurement of the ${{\mathit B}^{+}}$ and ${{\mathit B}^{0}}$ Lifetimes and Search for $\mathit CP(T)$ Violation using Reconstructed Secondary Vertices
 ABE 1998B
PR D57 5382 Measurement of ${{\mathit B}}$ Hadron Lifetimes using ${{\mathit J / \psi}}$ Final States at CDF
 ABE 1998Q
PR D58 092002 Improved Measurement of the ${{\mathit B}^{-}}$ and ${{\overline{\mathit B}}^{0}}$ Meson Lifetimes using Semileptonic Decays
 ACCIARRI 1998S
PL B438 417 Upper Limit on the Lifetime Difference of Short- and Long-Lived ${{\mathit B}_{{s}}^{0}}$ Mesons
 ABE 1997J
PRL 79 590 Measurement of the ${{\mathit B}^{+}}$ and ${{\mathit B}^{0}}$ Lifetimes using Topological Reconstruction of Inclusive and Semileptonic Decays
 ABE 1996C
PRL 76 4462 Measurement of the ${{\mathit B}^{-}}$ and ${{\overline{\mathit B}}^{0}}$ Meson Lifetimes using Semileptonic Decays
 BUSKULIC 1996J
ZPHY C71 31 Improved Measurement of the ${{\overline{\mathit B}}^{0}}$ and ${{\mathit B}^{-}}$ Meson Lifetimes
 ABREU 1995Q
ZPHY C68 13 A Measurement of ${{\mathit B}^{+}}$ and ${{\mathit B}^{0}}$ Lifetimes using ${{\overline{\mathit D}}}$ ${{\mathit \ell}^{+}}$ Events
ZPHY C68 363 Lifetimes of Charged and Neutral ${{\mathit B}}$ Hadrons using Event Topology
 AKERS 1995T
ZPHY C67 379 Improved Measurements of the ${{\mathit B}^{0}}$ and ${{\mathit B}^{+}}$ Meson Lifetimes
 ABE 1994D
PRL 72 3456 Measurement of the ${{\mathit B}^{+}}$ and ${{\mathit B}^{0}}$ Meson Lifetimes
 ABREU 1993G
PL B312 253 A Measurement of the Mean Lifetimes of Charged and Neutral ${{\mathit B}}$ Hadrons
 ABREU 1993D
ZPHY C57 181 A Measurement of ${{\mathit B}}$ Meson Production and Lifetime using ${{\mathit D}}$ ${{\mathit \ell}^{-}}$ Events in ${{\mathit Z}^{0}}$ Decays
 ACTON 1993C
PL B307 247 Measurement of the ${{\mathit B}^{0}}$ and ${{\mathit B}^{+}}$ Lifetime
 BUSKULIC 1993D
PL B307 194 Measurement of the ${{\overline{\mathit B}}^{0}}$ and ${{\mathit B}^{-}}$ Meson Lifetime
 Also
PL B325 537 (erratum) Erratum: BUSKULIC 1993D Measurement of the ${{\overline{\mathit B}}^{0}}$ and ${{\mathit B}^{-}}$ Meson Lifetime