ISOSPIN ASYMMETRY

$\Delta _{0-}$ is defined as
${\Gamma\mathrm {({{\overline{\mathit B}}^{0}} \rightarrow {{\mathit f}_{{{d}}}})}–\Gamma\mathrm {({{\mathit B}^{-}} \rightarrow {{\mathit f}_{{{u}}}})}\over \Gamma\mathrm {({{\overline{\mathit B}}^{0}} \rightarrow {{\mathit f}_{{{d}}}})}+\Gamma\mathrm {({{\mathit B}^{-}} \rightarrow {{\mathit f}_{{{u}}}})}}$,
the isospin asymmetry of inclusive neutral and charged B decay.

$\Delta _{0-}(B({{\mathit B}}$ $\rightarrow$ ${{\mathit K}}{{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$))

INSPIRE   JSON  (beta) PDGID:
S049IA3
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ -0.15 \pm0.06}$ OUR AVERAGE  Error includes scale factor of 1.2.
$-0.31$ ${}^{+0.13}_{-0.11}$ $\pm0.01$ 1
CHOUDHURY
2021
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$-0.10$ ${}^{+0.08}_{-0.09}$ $\pm0.02$ 2
AAIJ
2014M
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$-0.09$ ${}^{+0.08}_{-0.08}$ $\pm0.02$ 3
AAIJ
2014M
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$-0.58$ ${}^{+0.29}_{-0.37}$ $\pm0.02$ 4
LEES
2012S
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$-0.35$ ${}^{+0.23}_{-0.27}$ 5
AAIJ
2012AH
 LHCB Repl. by AAIJ 2014M
$-1.43$ ${}^{+0.56}_{-0.85}$ $\pm0.05$ 6, 7
AUBERT
2009T
 BABR Repl. by LEES 2012S
$-0.31$ ${}^{+0.17}_{-0.14}$ $\pm0.08$ 8, 9
WEI
2009A
 BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
1  For 1.0 $<$ q${}^{2}$ $<$ 6.0 GeV${}^{2}$/c${}^{4}$ using both ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ and ${{\mathit e}^{+}}{{\mathit e}^{-}}$ as a lepton pair. Measurements in other q${}^{2}$ bins are also reported.
2  For 1.1 $<$ q${}^{2}$ $<$ 6.0 GeV${}^{2}$/c${}^{4}$ using ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ as a lepton pair and assuming isospin symmetry for the ${{\mathit B}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit K}}$. Measurements in other q${}^{2}$ bins are also reported.
3  For 15.0 $<$ q${}^{2}$ $<$ 19.0 GeV${}^{2}$/c${}^{4}$ using ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ as a lepton pair and assuming isospin symmetry for the ${{\mathit B}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit K}}$. Measurements in other q${}^{2}$ bins are also reported.
4  For 0.10 $<$ q${}^{2}<$ 8.12 GeV${}^{2}$/c${}^{4}$. Measurements in other q${}^{2}$ bins are also reported.
5  For 1 $<$ q${}^{2}<$ 6 GeV${}^{2}$/c${}^{4}$.
6  For 0.1 $<$ ${{\mathit m}^{2}}_{{{\mathit \ell}^{+}} {{\mathit \ell}^{-}}}<$ 7.02 GeV${}^{2}$/c${}^{4}$.
7  Assumes equal production of ${{\mathit B}^{+}}$ and ${{\mathit B}^{0}}$ at the ${{\mathit \Upsilon}{(4S)}}$.
8  Superseded by CHOUDHURY 2021.
9  For q${}^{2}<$ 8.68 GeV${}^{2}$/c${}^{4}$.
References