# $\Delta \Gamma _{{{\boldsymbol B}_{{d}}^{0}}}$ $/$ $\Gamma _{{{\boldsymbol B}_{{d}}^{0}}}$ INSPIRE search

$\Gamma _{{{\mathit B}_{{d}}^{0}}}$ and $\Delta \Gamma _{{{\mathit B}_{{d}}^{0}}}$ are the decay rate average and difference between two ${{\mathit B}_{{d}}^{0}}$ $\mathit CP$ eigenstates (light $−$ heavy). The $\lambda _{CP}$ characterizes ${{\mathit B}^{0}}$ and ${{\overline{\mathit B}}^{0}}$ decays to states of charmonium plus ${{\mathit K}_L^0}$ , see the review on $\mathit CP$ Violation'' in the reviews section.

OUR EVALUATION'' has been obtained by the Heavy Flavor Averaging Group (HFLAV) by taking into account correlations between measurements.
VALUE ($10^{-2}$) CL% DOCUMENT ID TECN  COMMENT
$\bf{ 0.1 \pm1.0}$ OUR EVALUATION
$\bf{ 0.1 \pm1.0}$ OUR AVERAGE
$3.4$ $\pm2.3$ $\pm2.4$ 1
 2018 BY
CMS ${{\mathit p}}{{\mathit p}}$ at 8 TeV
$-0.1$ $\pm1.1$ $\pm0.9$ 2
 2016 G
ATLS ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$-4.4$ $\pm2.5$ $\pm1.1$ 3
 2014 E
LHCB ${{\mathit p}}{{\mathit p}}$ at 7 TeV
$1.7$ $\pm1.8$ $\pm1.1$ 4
 2012
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$0.8$ $\pm3.7$ $\pm1.8$ 5
 2004 C
BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$0$ $\pm9$ 6
 2003 B
DLPH ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$0.50$ $\pm1.38$
 2014
D0 ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
$<80$ 95 7
 2000 B
CLE2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
1  Measured using ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}^{*}{(892)}^{0}}$ and ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}_S^0}$ decays, and assuming $\beta$ = $21.9$ $\pm0.7$ degrees.
2  Measured from the ratio of decay time distributions of ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}_S^0}$ and ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}^{*0}}$ decays.
3  Measured using the effective lifetimes of ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}_S^0}$ and ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}^{*0}}$ decays.
4  Reports $−\Delta {{\mathit \Gamma}_{{d}}}/{{\mathit \Gamma}_{{d}}}$ using ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}_S^0}$ , ${{\mathit J / \psi}}{{\mathit K}_L^0}$ , ${{\mathit D}^{-}}{{\mathit \pi}^{+}}$ , ${{\mathit D}^{*-}}{{\mathit \pi}^{+}}$ , ${{\mathit D}^{*-}}{{\mathit \rho}^{+}}$ , and ${{\mathit D}^{*-}}{{\mathit \ell}^{+}}{{\mathit \nu}}$ decays.
5  Corresponds to 90$\%$ confidence range [$−$0.084, 0.068].
6  Used the measured $\tau _{{{\mathit B}^{0}}}$ = $1.55$ $\pm0.03~$ps. Corresponds to an upper limit of $<$ 0.18 at 95$\%$ C.L.
7  BEHRENS 2000B uses high-momentum lepton tags and partially reconstructed ${{\overline{\mathit B}}^{0}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}$ , ${{\mathit \rho}^{-}}$ decays to determine the flavor of the ${{\mathit B}}~$meson. Assumes $\Delta _{ }=0.478$ $\pm0.018~$ps${}^{-1}$ and $\tau _{{{\mathit B}^{0}}}=1.548$ $\pm0.032~$ps.
References:
 SIRUNYAN 2018BY
EPJ C78 457 Measurement of b hadron lifetimes in pp collisions at $\sqrt{s} =$ 8 TeV
 AABOUD 2016G
JHEP 1606 081 Measurement of the Relative width Difference of the ${{\mathit B}^{0}}−{{\overline{\mathit B}}^{0}}$ System with the ATLAS Detector
 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
 ABAZOV 2014
PR D89 012002 Study of $\mathit CP$-Violating Charge Asymmetries of Single Muons and Like-Sign Dimuons in ${{\mathit p}}{{\overline{\mathit p}}}$ Collisions
 HIGUCHI 2012
PR D85 071105 Search for Time-Dependent $\mathit CPT$ Violation in Hadronic and Semileptonic ${{\mathit B}}$ Decays
 AUBERT,B 2004C
PR D70 012007 Limits on the Decay Rate Difference of Neutral ${{\mathit B}}$ Mesons and on $\mathit CP$, $\mathit T$, and $\mathit CPT$ Violation in ${{\mathit B}^{0}}\leftrightarrow{{\overline{\mathit B}}^{0}}$ Oscillations
 ABDALLAH 2003B
EPJ C28 155 Search for ${{\mathit B}_{{s}}^{0}}\leftrightarrow{{\overline{\mathit B}}_{{s}}^{0}}$ Oscillations and a Measurement of ${{\mathit B}_{{d}}^{0}}\leftrightarrow{{\overline{\mathit B}}_{{d}}^{0}}$ Oscillations using Events with an Inclusively Reconstructed Vertex
 BEHRENS 2000B
PL B490 36 Precise Measurement of ${{\mathit B}^{0}}$ $\leftrightarrow$ ${{\overline{\mathit B}}^{0}}$ Mixing Parameters at the ${{\mathit \Upsilon}{(4S)}}$