# Belle

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 2018-12-1316:52 [PUBDB-2018-05459] Talk (non-conference) (Invited) Cunliffe, S. T. Dark sector physics with photons at Belle II Seminar, Karlsruhe Institute of TechnologyKarlsruhe, Karlsruhe Institute of Technology, Germany, 24 Sep 2018 - 26 Sep 2018   OpenAccess: PDF PDF (PDFA); External link: Fulltext 2018-12-1316:17 [PUBDB-2018-05458] Lecture (Invited) Wehle, S. Testing the Standard Model in rare decays of $B$ mesons at the Belle experiment Lecture at CEA Saclay (Parys- Saclay, France), 5 Mar 2018 - 5 Mar 2018   Rare decays of B mesons are an ideal probe to search for phenomena beyond the Standard Modelof particle physics, since contributions from new particles can aect the decays on the same level asStandard Model predictions. The rare decay of B ! K*ll oers the quark transition b ! sll, a avorchanging neutral current which is forbidden at tree level in the Standard Model. [...] OpenAccess: PDF PDF (PDFA); 2018-12-1315:50 [PUBDB-2018-05455] Conference Presentation (Invited) Wehle, S. Motivation for analysing $b→sll$ decays at CEPC The 2018 International Workshop on the High Energy Circular Electron Positron Collider, CEPS 2018, BeijingBeijing, China, 12 Nov 2018 - 14 Nov 2018   OpenAccess: PDF; External link: Fulltext 2018-12-1218:08 [PUBDB-2018-05443] Conference Presentation (Invited) Wehle, S. PyrooFit - a python wrapper for RooFit and an analysts feedback from the Belle II collaboration ROOT 2018 Developers Conference, ROOT 2018, Academy of Sciences and Arts (Akademija nauka i umjetnosti Bosne i Hercegovine)Sarajevo, Academy of Sciences and Arts (Akademija nauka i umjetnosti Bosne i Hercegovine), Bosnia and Herzegovina, 10 Sep 2018 - 13 Sep 2018   In this talk we present PyrooFit, a fit framework based on python and pandas DataFrames built on top of the ROOT.RooFit package. It currently allows for simple fits of standard PDFs and easy setup of custom PDFs in one or more fit dimensions, but the ultimate goal is to develop it into a general framework independent of a specific back-end.Finally in this talk we report on general feedback collected by the Belle II analysis community so far.. OpenAccess: PDF; External link: Fulltext 2018-12-1217:44 [PUBDB-2018-05441] Conference Presentation (After Call) Wehle, S. Test of lepton flavor universality in rare $B$ decays at Belle The 30th Rencontres de Blois, Blois 2018, Château of BloisChâteau of Blois, France, 3 Jun 2018 - 8 Jun 2018   OpenAccess: PDF PDF (PDFA); External link: Fulltext 2018-12-1217:29 [PUBDB-2018-05439] Talk (non-conference) (After Call) Wehle, S. Recent measurements of radiative andelectroweak penguin decays at Belle The Lake Louise Winter Institute 2018, University of AlbertaLake Louise, University of Alberta, Canada, 18 Feb 2018 - 24 Feb 2018   OpenAccess: PDF PDF (PDFA); External link: Fulltext 2018-12-1017:39 [PUBDB-2018-05382] Talk (non-conference) (Invited) Cunliffe, S. T. Status and prospects of the Belle II experiment Particle Physics Seminar, Universitiy of BirminghamBirmingham, Universitiy of Birmingham, United Kingdom, 5 Dec 2018   The Belle II experiment at the SuperKEKB accelerator in Tsukuba, Japan, is a second-generation B factory experiment. Approximately 500 pb-1 of collision data, where taken during May, June, and July of 2018. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2018-12-0516:45 [PUBDB-2018-05231] Report/Journal Article et al Observation of $e ^+ e ^− → γ χ_{ c 1}$ and search for $e ^+ e^ − → γ χ_ {c 0} , γ χ_{ c 2}$ , and $γ η_ c$ at $\sqrt{s}$ near 10.6 GeV at Belle [arXiv:1810.10291; Belle Preprint-2018-22; KEK Preprint-2018-55] Physical review / D 98(9), 092015 (2018) [10.1103/PhysRevD.98.092015]   Using data samples of 89.5  fb$^{−1}$, 711.0  fb$^{−1}$, and 121.4  fb$^{−1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^−$ collider at center-of-mass energies 10.52, 10.58, and 10.867 GeV, respectively, we study the exclusive reactions $e^+ e^− →γχ_{cJ}$ (J=0, 1, 2) and $e^+ e^− →γη_c$. A significant $γχ_{c1}$ signal is observed for the first time at $√s$=10.58  GeV with a significance of 5.1$σ$ including systematic uncertainties. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2018-12-0516:26 [PUBDB-2018-05228] Preprint/Report et al First measurements of absolute branching fractions of $\Xi_c^0$ at Belle [arXiv:1811.09738; Belle Preprint-2018-25; KEK Preprint-2018-76]   We present the first measurements of absolute branching fractions of $\Xi_c^0$ decays into $\Xi^- \pi^+$, $\Lambda K^- \pi^+$, and $p K^- K^- \pi^+$ final states. The measurements are made using a data set comprising $(772\pm 11)\times 10^{6}$ $B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB $e^+e^-$ collider. [...] OpenAccess: PDF PDF (PDFA); 2018-12-0516:21 [PUBDB-2018-05226] Preprint/Report et al Search for the rare decay of $B^+ \to \ell^{\,+} \nu_{\ell} \gamma$ with improved hadronic tagging [arXiv:1810.12976; Belle Preprint 2018-24; KEK Preprint 2018-67]   We present the result of the search for the rare $B$ meson decay of $B^+ \to \ell^{\,+} \nu_{\ell} \gamma$ with $\ell =e,\mu$. For the search the full data set recorded by the Belle experiment of $711 \, \mathrm{fb}^{-1}$ integrated luminosity near the $\Upsilon (4S)$ resonance is used. [...] OpenAccess: PDF PDF (PDFA);