pdgLive

$\Delta \mathit B$ = 1 WEAK NEUTRAL CURRENT FORBIDDEN
Allowed by higher-order electroweak interactions.

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit K}^{+}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} nonresonant)}$ $/$ $\Gamma\mathrm {(total)}$

$(4.37\pm{0.27})\times 10^{-7}$

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit K}^{+}} {{\mathit \tau}^{+}} {{\mathit \tau}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<2.25\times 10^{-3}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit \phi}} {{\mathit K}^{+}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(7.9^{+2.1}_{-1.7})\times 10^{-8}$

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit K}^{+}} {{\mathit \pi}^{+}} {{\mathit \pi}^{-}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(4.3\pm{0.4})\times 10^{-7}$

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit K}^{*}{(892)}^{+}} {{\mathit \nu}} {{\overline{\mathit \nu}}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<4.0\times 10^{-5}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit \rho}^{+}} {{\mathit \nu}} {{\overline{\mathit \nu}}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<3.0\times 10^{-5}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit \pi}^{+}} {{\mathit \ell}^{+}} {{\mathit \ell}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<4.9\times 10^{-8}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit \pi}^{+}} {{\mathit \nu}} {{\overline{\mathit \nu}}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<1.4\times 10^{-5}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit K}^{*}{(892)}^{+}} {{\mathit \ell}^{+}} {{\mathit \ell}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(1.01\pm{0.11})\times 10^{-6}$ (S = 1.1)

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit K}^{+}} {{\mathit \ell}^{+}} {{\mathit \ell}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(4.7\pm{0.5})\times 10^{-7}$ (S = 2.3)

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit K}^{+}} {{\overline{\mathit \nu}}} {{\mathit \nu}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<1.6\times 10^{-5}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit K}^{*}{(892)}^{+}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(9.6\pm{1.0})\times 10^{-7}$

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit K}^{*}{(892)}^{+}} {{\mathit e}^{+}} {{\mathit e}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(1.55^{+0.40}_{-0.31})\times 10^{-6}$

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit \pi}^{+}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(1.78\pm{0.23})\times 10^{-8}$

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit \pi}^{+}} {{\mathit e}^{+}} {{\mathit e}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<8.0\times 10^{-8}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit K}^{+}} {{\mathit e}^{+}} {{\mathit e}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(5.6\pm{0.6})\times 10^{-7}$

$\Gamma\mathrm {( {{\mathit B}^{+}} \rightarrow {{\mathit K}^{+}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(4.53\pm{0.35})\times 10^{-7}$ (S = 1.8)

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \pi}^{+}} {{\mathit \pi}^{-}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(2.1\pm{0.5})\times 10^{-8}$

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit S}} {{\mathit P}} , {{\mathit S}} \rightarrow {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} , {{\mathit P}} \rightarrow {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<6.0\times 10^{-10}$ CL=95.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<1.8\times 10^{-10}$ CL=95.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \eta}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<1.12\times 10^{-7}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \eta}} {{\mathit e}^{+}} {{\mathit e}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<1.08\times 10^{-7}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \eta}} {{\mathit \ell}^{+}} {{\mathit \ell}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<6.4\times 10^{-8}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \phi}} {{\mathit \nu}} {{\overline{\mathit \nu}}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<1.27\times 10^{-4}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \rho}^{0}} {{\mathit \nu}} {{\overline{\mathit \nu}}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<4.0\times 10^{-5}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit K}^{0}} {{\mathit \nu}} {{\overline{\mathit \nu}}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<2.6\times 10^{-5}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \pi}^{0}} {{\mathit \nu}} {{\overline{\mathit \nu}}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<9\times 10^{-6}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit e}^{+}} {{\mathit e}^{-}} {{\mathit \gamma}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<1.2\times 10^{-7}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \pi}^{0}} {{\mathit \ell}^{+}} {{\mathit \ell}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<5.3\times 10^{-8}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \pi}^{0}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<6.9\times 10^{-8}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \pi}^{0}} {{\mathit e}^{+}} {{\mathit e}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<8.4\times 10^{-8}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \tau}^{+}} {{\mathit \tau}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<2.1\times 10^{-3}$ CL=95.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \nu}} {{\overline{\mathit \nu}}} {{\mathit \gamma}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<1.6\times 10^{-5}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow invisible)}$ $/$ $\Gamma\mathrm {(total)}$

$<2.4\times 10^{-5}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit K}^{*}{(892)}^{0}} {{\mathit \ell}^{+}} {{\mathit \ell}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(9.9^{+1.2}_{-1.1})\times 10^{-7}$

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit K}^{0}} {{\mathit \ell}^{+}} {{\mathit \ell}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(3.3\pm{0.6})\times 10^{-7}$

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit K}^{*}{(892)}^{0}} {{\mathit \nu}} {{\overline{\mathit \nu}}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<1.8\times 10^{-5}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \gamma}} {{\mathit \gamma}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<3.2\times 10^{-7}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit K}^{*}{(892)}^{0}} {{\mathit e}^{+}} {{\mathit e}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(1.03^{+0.19}_{-0.17})\times 10^{-6}$

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit K}^{*}{(892)}^{0}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(9.4\pm{0.5})\times 10^{-7}$

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit K}^{0}} {{\mathit e}^{+}} {{\mathit e}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(2.5^{+1.1}_{-0.9})\times 10^{-7}$ (S = 1.3)

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit K}^{0}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(3.39\pm{0.35})\times 10^{-7}$ (S = 1.1)

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(7^{+13}_{-11})\times 10^{-11}$ (S = 1.8)

$\Gamma\mathrm {( {{\mathit B}^{0}} \rightarrow {{\mathit e}^{+}} {{\mathit e}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<2.5\times 10^{-9}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit \rho}} {{\mathit \nu}} {{\overline{\mathit \nu}}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<2.8\times 10^{-5}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit \pi}} {{\mathit \nu}} {{\overline{\mathit \nu}}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<8\times 10^{-6}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit \pi}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<5.0\times 10^{-8}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit \pi}} {{\mathit e}^{+}} {{\mathit e}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<1.10\times 10^{-7}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit K}} {{\mathit \nu}} {{\overline{\mathit \nu}}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<1.6\times 10^{-5}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit K}^{*}} {{\mathit \nu}} {{\overline{\mathit \nu}}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<2.7\times 10^{-5}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit \pi}} {{\mathit \ell}^{+}} {{\mathit \ell}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<5.9\times 10^{-8}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit K}^{*}{(892)}} {{\mathit \ell}^{+}} {{\mathit \ell}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(1.05\pm{0.10})\times 10^{-6}$

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit K}} {{\mathit \ell}^{+}} {{\mathit \ell}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(4.8\pm{0.4})\times 10^{-7}$

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit K}^{*}{(892)}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(1.06\pm{0.09})\times 10^{-6}$

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit K}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(4.4\pm{0.4})\times 10^{-7}$

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit K}^{*}{(892)}} {{\mathit e}^{+}} {{\mathit e}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(1.19\pm{0.20})\times 10^{-6}$ (S = 1.2)

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit K}} {{\mathit e}^{+}} {{\mathit e}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(4.4\pm{0.6})\times 10^{-7}$

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit s}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(4.3\pm{1.0})\times 10^{-6}$

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit s}} {{\mathit e}^{+}} {{\mathit e}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(6.7\pm{1.7})\times 10^{-6}$ (S = 2.0)

$\Gamma\mathrm {( {{\mathit B}} \rightarrow {{\mathit s}} {{\mathit \ell}^{+}} {{\mathit \ell}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(5.8\pm{1.3})\times 10^{-6}$ (S = 1.8)

$\Gamma\mathrm {( {{\overline{\mathit b}}} \rightarrow {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} anything)}$ $/$ $\Gamma\mathrm {(total)}$

$<3.2\times 10^{-4}$ CL=90.0%

$\Gamma\mathrm {( {{\overline{\mathit b}}} \rightarrow {{\overline{\mathit s}}} {{\overline{\mathit \nu}}} {{\mathit \nu}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<6.4\times 10^{-4}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}_{{{s}}}^{0}} \rightarrow {{\overline{\mathit K}}^{*}{(892)}^{0}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(2.9\pm{1.1})\times 10^{-8}$

$\Gamma\mathrm {( {{\mathit B}_{{{s}}}^{0}} \rightarrow {{\mathit \tau}^{+}} {{\mathit \tau}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<6.8\times 10^{-3}$ CL=95.0%

$\Gamma\mathrm {( {{\mathit B}_{{{s}}}^{0}} \rightarrow {{\mathit \pi}^{+}} {{\mathit \pi}^{-}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(8.4\pm{1.7})\times 10^{-8}$

$\Gamma\mathrm {( {{\mathit B}_{{{s}}}^{0}} \rightarrow {{\mathit S}} {{\mathit P}} , {{\mathit S}} \rightarrow {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} , {{\mathit P}} \rightarrow {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<2.2\times 10^{-9}$ CL=95.0%

$\Gamma\mathrm {( {{\mathit B}_{{{s}}}^{0}} \rightarrow {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<8.6\times 10^{-10}$ CL=95.0%

$\Gamma\mathrm {( {{\mathit B}_{{{s}}}^{0}} \rightarrow {{\mathit \phi}{(1020)}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(8.4\pm{0.4})\times 10^{-7}$

$\Gamma\mathrm {( {{\mathit B}_{{{s}}}^{0}} \rightarrow {{\mathit e}^{+}} {{\mathit e}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<9.4\times 10^{-9}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}_{{{s}}}^{0}} \rightarrow {{\mathit \phi}} {{\mathit \nu}} {{\overline{\mathit \nu}}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<5.4\times 10^{-3}$ CL=90.0%

$\Gamma\mathrm {( {{\mathit B}_{{{s}}}^{0}} \rightarrow {{\mathit \phi}} {{\mathit \gamma}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(3.4\pm{0.4})\times 10^{-5}$

$\Gamma\mathrm {( {{\mathit B}_{{{s}}}^{0}} \rightarrow {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} )}$ $/$ $\Gamma\mathrm {(total)}$

$(3.01\pm{0.35})\times 10^{-9}$

$\Gamma\mathrm {( {{\mathit B}_{{{s}}}^{0}} \rightarrow {{\mathit \gamma}} {{\mathit \gamma}} )}$ $/$ $\Gamma\mathrm {(total)}$

$<3.1\times 10^{-6}$ CL=90.0%

[1]	An ${{\mathit \ell}}$ indicates an ${{\mathit e}}$ or a ${{\mathit \mu}}$ mode, not a sum over these modes.

[2]	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.

Except where otherwise noted, content of the 2023 Review of Particle Physics is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy), JPS and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2023. See LBNL disclaimers.