BOTTOM MESONS
($\mathit B$ = $\pm1$)
${{\mathit B}^{+}}$ = ${\mathit {\mathit u}}$ ${\mathit {\overline{\mathit b}}}$, ${{\mathit B}^{0}}$ = ${\mathit {\mathit d}}$ ${\mathit {\overline{\mathit b}}}$, ${{\overline{\mathit B}}^{0}}$ = ${\mathit {\overline{\mathit d}}}$ ${\mathit {\mathit b}}$, ${{\mathit B}^{-}}$ = ${\mathit {\overline{\mathit u}}}$ ${\mathit {\mathit b}}$,
similarly for ${{\mathit B}^{*}}$'s 		INSPIRE   JSON PDGID:
S042

${{\mathit B}^{0}}$

$I(J^P)$ = $1/2(0^{-})$ 
Quantum numbers not measured. Values shown are quark-model predictions. See also the ${{\mathit B}^{\pm}}/{{\mathit B}^{0}}$ ADMIXTURE and ${{\mathit B}^{\pm}}/{{\mathit B}^{0}}/{{\mathit B}_{{{s}}}^{0}}/{{\mathit b}}$-baryon ADMIXTURE sections. See the Note ``Production and Decay of ${{\mathit b}}$-flavored Hadrons'' at the beginning of the ${{\mathit B}^{\pm}}$ Particle Listings and the Note on ``${{\mathit B}^{0}}-{{\overline{\mathit B}}^{0}}$ Mixing'' near the end of the ${{\mathit B}^{0}}$ Particle Listings.
Expand/Collapse All
${{\mathit B}^{0}}$ MASS $5279.63$ $\pm0.20$ MeV 
 
${\mathit m}_{{{\mathit B}^{0}}}-{\mathit m}_{{{\mathit B}^{+}}}$ $0.31$ $\pm0.05$ MeV 
 
${{\mathit B}^{0}}$ MEAN LIFE ($1.517$ $\pm0.004$) $ \times 10^{-12}$ s 
 
${\mathit \tau}_{{{\mathit B}^{0}}}/{\mathit \tau}_{{{\overline{\mathit B}}^{0}}}$ $1.000$ $\pm0.012$  
 
▸  MEAN LIFE RATIO ${\mathit \tau}_{{{\mathit B}^{+}}}/{\mathit \tau}_{{{\mathit B}^{0}}}$
$\Delta \Gamma _{{{\mathit B}_{{{d}}}^{0}}}$ $/$ $\Gamma _{{{\mathit B}_{{{d}}}^{0}}}$ $0.001$ $\pm0.010$  
 
▸  POLARIZATION IN ${{\mathit B}^{0}}$ DECAY
▸  ${{\mathit B}^{0}}-{{\overline{\mathit B}}^{0}}$ MIXING PARAMETERS
▸  $\mathit CP$ VIOLATION PARAMETERS
▸  $\mathit CP$ VIOLATION PARAMETERS IN ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit D}^{0}}{{\mathit K}^{*0}}$ DECAY
▸  $\mathit T$ and $\mathit CPT$ VIOLATION PARAMETERS
▸  ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit D}^{*-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ FORM FACTORS
▸  PARTIAL BRANCHING FRACTIONS IN ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit K}^{(*)0}}{{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$
▸  PRODUCTION ASYMMETRIES
▸  FORWARD-BACKWARD ASYMMETRIES
${{\overline{\mathit B}}^{0}}$ modes are charge conjugates of the modes below. Reactions indicate the weak decay vertex and do not include mixing. Modes which do not identify the charge state of the ${{\mathit B}}$ are listed in the ${{\mathit B}^{\pm}}/{{\mathit B}^{0}}$ ADMIXTURE section.
The branching fractions listed below assume 50$\%$ ${{\mathit B}^{0}}{{\overline{\mathit B}}^{0}}$ and 50$\%$ ${{\mathit B}^{+}}{{\mathit B}^{-}}$ production at the ${{\mathit \Upsilon}{(4S)}}$. We have attempted to bring older measurements up to date by rescaling their assumed ${{\mathit \Upsilon}{(4S)}}$ production ratio to 50:50 and their assumed ${{\mathit D}}$, ${{\mathit D}_{{{s}}}}$, ${{\mathit D}^{*}}$, and ${{\mathit \psi}}$ branching ratios to current values whenever this would affect our averages and best limits significantly.
Indentation is used to indicate a subchannel of a previous reaction. All resonant subchannels have been corrected for resonance branching fractions to the final state so the sum of the subchannel branching fractions can exceed that of the final state.
For inclusive branching fractions, $\mathit e.g.,$ ${{\mathit B}}$ $\rightarrow$ ${{\mathit D}^{\pm}}{{\mathit X}}$, the values usually are multiplicities, not branching fractions. They can be greater than one.
Mode  
Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{1}$ ${{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}{{\mathit X}}$ [1] ($10.33$ $\pm0.28$ ) $\%$  
 
$\Gamma_{2}$ ${{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}{{\mathit X}_{{{c}}}}$ ($10.1$ $\pm0.4$ ) $\%$  
 
$\Gamma_{3}$ ${{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}{{\mathit X}_{{{u}}}}$ [1] ($1.51$ $\pm0.19$) $ \times 10^{-3}$  
 
$\Gamma_{4}$ ${{\mathit D}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}{{\mathit X}}$ [1] ($9.1$ $\pm0.8$ ) $\%$  
 
$\Gamma_{5}$ ${{\mathit D}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ [1] ($2.10$ $\pm0.07$ ) $\%$ 2309
 
$\Gamma_{6}$ ${{\mathit D}^{-}}{{\mathit \tau}^{+}}{{\mathit \nu}_{{{\tau}}}}$ ($9.8$ $\pm2.1$) $ \times 10^{-3}$ 1909
 
$\Gamma_{7}$ ${{\mathit D}^{*}{(2010)}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ [1] ($4.87$ $\pm0.09$ ) $\%$ 2257
 
$\Gamma_{8}$ ${{\mathit D}^{*}{(2010)}^{-}}{{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}$ 2257
 
$\Gamma_{9}$ ${{\mathit D}^{*}{(2010)}^{-}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$ 2256
 
$\Gamma_{10}$ ${{\mathit D}^{*}{(2010)}^{-}}{{\mathit \tau}^{+}}{{\mathit \nu}_{{{\tau}}}}$ ($1.48$ $\pm0.09$ ) $\%$ S=1.2  1838
 
$\Gamma_{11}$ ${{\overline{\mathit D}}^{(*)}}$ n ${{\mathit \pi}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ (n ${}\geq{}$ 1) [1] ($2.2$ $\pm0.4$ ) $\%$  
 
$\Gamma_{12}$ ${{\overline{\mathit D}}^{0}}{{\mathit \pi}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ [1] ($3.64$ $\pm0.20$) $ \times 10^{-3}$ 2308
 
$\Gamma_{13}$ ${{\mathit D}_{{{0}}}^{*}{(2300)}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ , ${{\mathit D}_{{{0}}}^{*-}}$ $\rightarrow$ ${{\overline{\mathit D}}^{0}}{{\mathit \pi}^{-}}$ [1] $<4.4$ $\times 10^{-4}$ CL=90%  
 
$\Gamma_{14}$ ${{\mathit D}_{{{2}}}^{*}{(2460)}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ , ${{\mathit D}_{{{2}}}^{*-}}$ $\rightarrow$ ${{\overline{\mathit D}}^{0}}{{\mathit \pi}^{-}}$ [1] ($1.41$ $\pm0.20$) $ \times 10^{-3}$ S=1.7  2065
 
$\Gamma_{15}$ ${{\overline{\mathit D}}^{*0}}{{\mathit \pi}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ [1] ($5.44$ $\pm0.28$) $ \times 10^{-3}$ 2256
 
$\Gamma_{16}$ ${{\mathit D}_{{{1}}}{(2420)}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ , ${{\mathit D}_{{{1}}}^{-}}$ $\rightarrow$ ${{\overline{\mathit D}}^{*0}}{{\mathit \pi}^{-}}$ [1] ($2.85$ $\pm0.25$) $ \times 10^{-3}$  
 
$\Gamma_{17}$ ${{\mathit D}_{{{1}}}{(2420)}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ , ${{\mathit D}_{{{1}}}^{-}}$ $\rightarrow$ ${{\mathit D}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ [1] ($1.02$ $\pm0.16$) $ \times 10^{-3}$  
 
$\Gamma_{18}$ ${{\mathit D}_{{{1}}}^{\,'}{(2430)}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ , ${{\mathit D}_{{{1}}}^{'-}}$ $\rightarrow$ ${{\overline{\mathit D}}^{*0}}{{\mathit \pi}^{-}}$ [1] ($2.5$ $\pm0.6$) $ \times 10^{-3}$  
 
$\Gamma_{19}$ ${{\mathit D}_{{{2}}}^{*}{(2460)}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ , ${{\mathit D}_{{{2}}}^{*-}}$ $\rightarrow$ ${{\overline{\mathit D}}^{*0}}{{\mathit \pi}^{-}}$ [1] ($6.6$ $\pm1.1$) $ \times 10^{-4}$ 2065
 
$\Gamma_{20}$ ${{\mathit D}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ [1] ($1.45$ $\pm0.22$) $ \times 10^{-3}$ 2299
 
$\Gamma_{21}$ ${{\mathit D}^{*-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ [1] ($5.1$ $\pm2.3$) $ \times 10^{-4}$ 2247
 
$\Gamma_{22}$ ${{\mathit \rho}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ [1] ($2.94$ $\pm0.21$) $ \times 10^{-4}$ 2583
 
$\Gamma_{23}$ ${{\mathit \pi}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ [1] ($1.50$ $\pm0.05$) $ \times 10^{-4}$ 2638
 
$\Gamma_{24}$ ${{\mathit \pi}^{-}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$ 2637
 
$\Gamma_{25}$ ${{\mathit \pi}^{-}}{{\mathit \tau}^{+}}{{\mathit \nu}_{{{\tau}}}}$ $<2.5$ $\times 10^{-4}$ CL=90% 2339
 
▸  Inclusive modes
▸  ${{\mathit D}}$, ${{\mathit D}^{*}}$, or ${{\mathit D}_{{{s}}}}$ modes
▸  Charmonium modes
▸  ${{\mathit K}}$ or ${{\mathit K}^{*}}$ modes
▸  Light unflavored meson modes
▸  Baryon modes
▸  Lepton Family number ($\mathit LF$) or Lepton number ($\mathit L$) or Baryon number ($\mathit B$) violating modes, or/and $\Delta \mathit B$ = 1 weak neutral current ($\mathit B1$) modes
[1] An ${{\mathit \ell}}$ indicates an ${{\mathit e}}$ or a ${{\mathit \mu}}$ mode, not a sum over these modes.
[2] ${{\overline{\mathit D}}^{**}}$ represents an excited state with mass 2.2 $<$ M $<$ 2.8 GeV/c${}^{2}$.
[3] ${{\mathit \chi}_{{{c1}}}{(3872)}^{+}}$ is a hypothetical charged partner of the ${{\mathit \chi}_{{{c1}}}{(3872)}}$.
[4] Stands for the possible candidates of ${{\mathit K}^{*}{(1410)}}$, ${{\mathit K}_{{{0}}}^{*}{(1430)}}$ and ${{\mathit K}_{{{2}}}^{*}{(1430)}}$.
[5] ${{\mathit B}^{0}}$ and ${{\mathit B}_{{{s}}}^{0}}$ contributions not separated. Limit is on weighted average of the two decay rates.
[6] This decay refers to the coherent sum of resonant and nonresonant $\mathit J{}^{P} = 0{}^{+}{{\mathit K}}{{\mathit \pi}}$ components with 1.60 $<$ ${\mathit m}_{{{\mathit K}} {{\mathit \pi}}}<$ 2.15 GeV/c${}^{2}$.
[7] ${{\mathit X}{(214)}}$ is a hypothetical particle of mass 214 MeV/c${}^{2}$ reported by the HyperCP experiment, Physical Review Letters 94 021801 (2005)
[8] The value is for the sum of the charge states or particle/antiparticle states indicated.
[9] ${{\mathit \Theta}{(1540)}^{+}}$ denotes a possible narrow pentaquark state.
[10] ${{\mathit \psi}_{{{DS}}}}$ is a GeV-scale dark sector antibaryon (mass range $1 - 4$ GeV/c${}^{2}$).
[11] Here ${{\mathit S}}$ and ${{\mathit P}}$ are the hypothetical scalar and pseudoscalar particles with masses of 2.5 GeV/c${}^{2}$ and 214.3 MeV/c${}^{2}$, respectively.
Constrained Fit information