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تسجيل مستخدم جديدExclusive $B^0 to pi^- ell^+ u_ell$ Decays with Hadronic Full Event Interpretation Tagging in 34.6 fb$^{-1}$ of Belle II Data
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We present the results of the re-discovery of the decay $B^0 to pi^- ell^+ u_ell$ in 34.6 fb$^{-1}$ of Belle II data using hadronic $B$-tagging via the Full Event Interpretation algorithm. We observe 21 signal events on a background of 155 in a fit to the distribution of the square of the missing mass, $M_{mathrm{miss}}^2$, with a significance of 5.69$sigma$, and determine a total branching fraction of (1.58 $pm$ 0.43$_{mathrm{stat}}$ $pm$ 0.07$_{mathrm{sys}}$) $times 10^{-4}$.
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We report measurements of the $bar{B}^0 to D^{*+} ell^{-} bar{ u}_l$ and $B^- to D^{0} ell^{-} bar{ u}_l$ processes using 34.6 fb$^{-1}$ of collision events recorded by the Belle II experiment at the SuperKEKB asymmetric-energy $e^+ e^-$ collider. Fo
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We present a first measurement of the $bar{B^{0}} rightarrow D^{*+} ell^{-} u_{ell}$ branching fraction using fully reconstructed $B$ meson decays employing the Full Event Interpretation algorithm. Collision events corresponding to an integrated lum
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We search for the process $B^0 to pi^- tau^+ u_tau$ using the full Belle data set of $711,{rm fb}^{-1}$, corresponding to $772 times 10^6 Bbar{B}$ pairs, collected at the $Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy
$e^+ e^-$ collider. We reconstruct one $B$ meson in a hadronic decay and search for the $B^0 to pi^- tau^+ u_tau$ process in the remainder of the event. No significant signal is observed and an upper limit of $mathcal{B}(B^0 to pi^- tau^+ u_tau) < 2.5 times 10^{-4}$ is obtained at the $90%$ confidence level.
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