# Belle

 2017-02-1516:21 [PUBDB-2017-00974] Report/Journal Article et al Search for $D^{0}$ decays to invisible final states at Belle [BELLE-PREPRINT-2013-13; KEK-PREPRINT-2013-51; BELLE-PREPRINT-2016-13; KEK-PREPRINT-2016-51; arXiv:1611.09455] Physical review / D 95(1), 011102(R) (2017) [10.1103/PhysRevD.95.011102]   We report the result from the first search for $D^0$ decays to invisible final states. The analysis is performed on a data sample of 924 fb$^{-1}$ collected at and near the ϒ(4S) and ϒ(5S) resonances with the Belle detector at the KEKB asymmetric-energy $e^{+}e^-$ collider. [...] OpenAccess: PDF; External link: Fulltext 2017-02-1516:11 [PUBDB-2017-00973] Report/Journal Article et al Observation of $D^0 \to \rho^0\gamma$ and Search for $CP$ Violation in Radiative Charm Decays [BELLE-CONF-1601; BELLE-PREPRINT-2016-11; arXiv:1603.03257] Physical review letters 118(5), 051801 (2017) [10.1103/PhysRevLett.118.051801]   We report the first observation of the radiative charm decay $D^{0}→ρ^{0}γ$ and the first search for CP violation in decays $D^{0}→ρ^{0}γ$, ϕγ, and $\bar{K}$*0(892)γ, using a data sample of 943  fb$^{−1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^{+}e^−$ collider. The branching fraction is measured to be B($D^{0}→ρ^{0}γ$)=(1.77±0.30±0.07)×10$^{−5}$, where the first uncertainty is statistical and the second is systematic. [...] OpenAccess: PDF; External link: Fulltext 2017-01-1008:53 [PUBDB-2017-00384] Report/Journal Article et al Measurement of the lepton forward-backward asymmetry in $B \rightarrow X_s \ell^+ \ell^-$ decays with a sum of exclusive modes [BELLE-PREPRINT-2014-1; KEK-PREPRINT-2013-60; arXiv:1402.7134] Physical review / D 93(35), 032008 (20162016) [10.1103/PhysRevD.93.032008]   OpenAccess: PDF; 2017-01-0510:22 [PUBDB-2017-00117] Report/Journal Article et al Search for the $0^{--}$ Glueball in $\Upsilon(1S)$ and $\Upsilon(2S)$ decays [BELLE-PREPRINT-2016-12; KEK-PREPRINT-2016-50; arXiv:1611.07131] Physical review / D 95(1), 012001 (2017) [10.1103/PhysRevD.95.012001]   We report the first search for the $J^{PC}=0^{--}$ glueball in $\Upsilon(1S)$ and $\Upsilon(2S)$ decays with data samples of $(102\pm2)$ million and $(158\pm4)$ million events, respectively, collected with the Belle detector. No significant signals are observed in any of the proposed production modes, and the 90\% credibility level upper limits on their branching fractions in $\Upsilon(1S)$ and $\Upsilon(2S)$ decays are obtained. [...] OpenAccess: PDF; External link: Fulltext 2016-12-2216:19 [PUBDB-2016-06678] Poster et al Migrating the Belle II Collaborative Services and Tools 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, Meeting locationSan Francisco, USA, 10 Oct 2016 - 14 Oct 2016   OpenAccess: PDF PDF (PDFA); External link: Fulltext 2016-12-2010:55 [PUBDB-2016-06408] Preprint/Report et al Lepton-Flavor-Dependent Angular Analysis of $B\to K^\ast \ell^+\ell^-$ [BELLE-PREPRINT-2016-15; KEK-PREPRINT-2016-54; arXiv:1612.05014]   We present a measurement of angular observables and a test of lepton flavor universality in the $B\to K^\ast \ell^+\ell^-$ decay, where $\ell$ is either $e$ or $\mu$. The analysis is performed on a data sample corresponding to an integrated luminosity of $711~\mathrm{fb}^{-1}$ containing $772\times 10^{6}$ $B\bar B$ pairs, collected at the $\Upsilon(4S)$ resonance with the Belle detector at the asymmetric-energy $e^+e^-$ collider KEKB. [...] OpenAccess: PDF PDF (PDFA); 2016-12-1611:50 [PUBDB-2016-06279] Preprint/Report et al Measurement of the $\tau$ lepton polarization and $R(D^*)$ in the decay $\bar{B} \to D^* \tau^- \bar{\nu}_\tau$ [KEK-PREPRINT-2016-53; BELLE-PREPRINT-2016-14; arXiv:1612.00529]   We report the first measurement of the $\tau$ lepton polarization $P_\tau(D^*)$ in the decay $\bar{B} \rightarrow D^* \tau^- \bar{\nu}_\tau$ as well as a new measurement of the ratio of the branching fractions $R(D^{*}) = \mathcal{B}(\bar {B} \rightarrow D^* \tau^- \bar{\nu}_\tau) / \mathcal{B}(\bar{B} \rightarrow D^* \ell^- \bar{\nu}_\ell)$, where $\ell^-$ denotes an electron or a muon, and the $\tau$ is reconstructed in the modes $\tau^- \rightarrow \pi^- \nu_\tau$ and $\tau^- \rightarrow \rho^- \nu_\tau$. We use the full data sample of $772 \times 10^6$ $B{\bar B}$ pairs recorded with the Belle detector at the KEKB electron-positron collider. [...] OpenAccess: PDF PDF (PDFA); 2016-12-1611:20 [PUBDB-2016-06272] Preprint/Report et al Search for $D^{0}$ decays to invisible final states at Belle [BELLE-PREPRINT-2013-13; KEK-PREPRINT-2013-51; arXiv:1611.09455]   We report the result from the first search for $D^0$ decays to invisible final states. The analysis is performed on a data sample of 924 $\rm{fb}^{-1}$ collected at and near the $\Upsilon(4S)$ and $\Upsilon(5S)$ resonances with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. [...] OpenAccess: PDF PDF (PDFA); 2016-12-1611:09 [PUBDB-2016-06269] Report/Journal Article et al Search for a dark vector gauge boson decaying to $\pi^+ \pi^-$ using $\eta \rightarrow \pi^+\pi^- \gamma$ decays [arXiv:1609.05599; Belle Preprint 2016-10, KEK Preprint 2016-19] Physical review / D 94(9), 092006 (2016) [10.1103/PhysRevD.94.092006]   We report a search for a dark vector gauge boson U′ that couples to quarks in the decay chain $D*^{+} \to D^{0}\pi^{+}, D^{0} \to K^{0}_{S}\eta, \eta \to U' \to \pi^{+}\pi^{-}$. No signal is found and we set a mass-dependent limit on the baryonic fine structure constant of 10$^{-3}$-10$^{-2}$ in the U′ mass range of 290 to 520 MeV/c$^2$. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2016-11-2815:24 [PUBDB-2016-05686] Report/Journal Article et al Measurement of the branching ratio of $\bar{B}^0 \rightarrow D^{*+} \tau^- \bar{\nu}_{\tau}$ relative to $\bar{B}^0 \rightarrow D^{*+} \ell^- \bar{\nu}_{\ell}$ decays with a semileptonic tagging method [KEK-PREPRINT-2016-8; BELLE-PREPRINT-2016-8; arXiv:1607.07923] Physical review / D 94(7), 072007 (2016) [10.1103/PhysRevD.94.072007]   We report a measurement of the ratio R(D*)=B(B¯0→D*+τ-ν¯τ)/B(B¯0→D*+ℓ-ν¯ℓ), where ℓ denotes an electron or a muon. The results are based on a data sample containing 772×106 BB¯ pairs recorded at the ϒ(4S) resonance with the Belle detector at the KEKB e+e- collider. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext