${{\mathit B}}$ $\rightarrow$ ${{\mathit X}_{{{s}}}}{{\mathit \gamma}}$ PHOTON ENERGY MOMENTS

$\langle \mathit E{}^{2}_{{{\mathit \gamma}}}\rangle $ $−$ $\langle \mathit E_{{{\mathit \gamma}}}\rangle {}^{2}$

INSPIRE   JSON  (beta) PDGID:
S049GM2
VALUE ($ 10^{-2} $ GeV${}^{2}$) DOCUMENT ID TECN  COMMENT
$\bf{ 3.03 \pm0.25}$ OUR AVERAGE
$2.11$ $\pm0.57$ ${}^{+0.55}_{-0.69}$ 1, 2
LEES
2012U
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$3.62$ $\pm0.33$ $\pm0.33$ 3, 2
LEES
2012V
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$3.02$ $\pm0.19$ $\pm0.30$ 3
LIMOSANI
2009
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$3.34$ $\pm1.24$ $\pm0.62$ 3, 4
AUBERT
2008O
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$2.17$ $\pm0.60$ $\pm0.55$ 3, 2
SCHWANDA
2008
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$3.28$ $\pm0.40$ $\pm0.43$ 3
AUBERT,BE
2006B
 BABR Repl. by LEES 2012V
1  LEES 2012U uses $\mathit E_{{{\mathit \gamma}}}$ $>$ 1.897 GeV to calculate the moments; the moments are used to calculate the HQET parameters ${\mathit m}_{{{\mathit b}}}$ = $4.579$ ${}^{+0.032}_{-0.029}$ GeV/c${}^{2}$ and ${{\mathit \mu}_{{{\pi}}}^{2}}$ = $0.257$ ${}^{+0.034}_{-0.039}~$GeV${}^{2}$ in the shape function model. The same HQET parameters are also determined in the kinetic model.
2  Results for different $\mathit E_{{{\mathit \gamma}}}$ threshold values are also measured.
3  The result is for $\mathit E_{{{\mathit \gamma}}}>$ 1.9 GeV.
4  Uses a fully reconstructed ${{\mathit B}}$ meson as a tag on the recoil side.
References