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.

$\Delta _{0-}(B({{\mathit B}}$ $\rightarrow$ ${{\mathit X}_{{{s+d}}}}{{\mathit \gamma}}$))

INSPIRE   JSON  (beta) PDGID:
S049A07
VALUE DOCUMENT ID TECN  COMMENT
$-0.06$ $\pm0.15$ $\pm0.07$ 1
AUBERT
2008O
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
1  Uses a fully reconstructed ${{\mathit B}}$ meson as a tag on the recoil side. The result is for $\mathit E_{{{\mathit \gamma}}}$ $>$ 2.2 GeV.
References