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

$\langle \mathit E_{{{\mathit \gamma}}}\rangle $

INSPIRE   JSON  (beta) PDGID:
S049GM1
VALUE (GeV) DOCUMENT ID TECN  COMMENT
$\bf{ 2.314 \pm0.011}$ OUR AVERAGE
$2.346$ $\pm0.018$ ${}^{+0.027}_{-0.022}$ 1, 2
LEES
2012U
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$2.304$ $\pm0.014$ $\pm0.017$ 3, 2
LEES
2012V
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$2.311$ $\pm0.009$ $\pm0.015$ 3
LIMOSANI
2009
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$2.289$ $\pm0.058$ $\pm0.027$ 3, 4
AUBERT
2008O
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$2.309$ $\pm0.023$ $\pm0.023$ 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. • •
$2.288$ $\pm0.025$ $\pm0.023$ 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