Kavli Affiliate: T. Higuchi
| First 5 Authors: Belle, Belle, , ,
| Summary:
We report the first observation of the two-body baryonic decays $B^+ to
Sigma_c(2455)^++ overlineXi_c^-$ and $B^0 to
Sigma_c(2455)^0 overlineXi_c^0$ with significances of
$7.3,sigma$ and $6.2,sigma$, respectively, including statistical and
systematic uncertainties. The branching fractions are measured to be
$mathcalB(B^+ to Sigma_c(2455)^++ overlineXi_c^-) = (5.74
pm 1.11 pm 0.42_-1.53^+2.47) times 10^-4$ and $mathcalB(B^0 to
Sigma_c(2455)^0 overlineXi_c^0) = (4.83 pm 1.12 pm
0.37_-0.60^+0.72) times 10^-4$. The first and second uncertainties are
statistical and systematic, respectively, while the third ones arise from the
absolute branching fractions of $overlineXi_c^-$ or
$overlineXi_c^0$ decays. The data samples used for this analysis have
integrated luminosities of 711~$mathrmfb^-1$ and 365~$mathrmfb^-1$,
and were collected at the $Upsilon(4S)$ resonance by the Belle and Belle~II
detectors operating at the KEKB and SuperKEKB asymmetric-energy $e^+e^-$
colliders, respectively.
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