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RESEARCH PRODUCT

Evidence for aBs0π±State

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Made available in DSpace on 2022-04-28T19:03:57Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-07-07 We report evidence for a narrow structure, X(5568), in the decay sequence X(5568)→Bs0π±, Bs0→J/ψφ, J/ψ→μ+μ-, φ→K+K-. This is evidence for the first instance of a hadronic state with valence quarks of four different flavors. The mass and natural width of this state are measured to be m=5567.8±2.9(stat)-1.9+0.9(syst) MeV/c2 and Γ=21.9±6.4(stat)-2.5+5.0(syst) MeV/c2. If the decay is X(5568)→Bs∗π±→Bs0γπ± with an unseen γ, m(X(5568)) will be shifted up by m(Bs∗)-m(Bs0)∼49 MeV/c2. This measurement is based on 10.4 fb-1 of pp collision data at s=1.96 TeV collected by the D0 experiment at the Fermilab Tevatron collider. LAFEX Centro Brasileiro de Pesquisas Físicas Rio de Janeiro Universidade Do Estado Do Rio de Janeiro Universidade Federal Do ABC University of Science and Technology of China Universidad de Los Andes Charles University Faculty of Mathematics and Physics Center for Particle Physics Czech Technical University in Prague Institute of Physics Academy of Sciences of the Czech Republic Universidad San Francisco de Quito LPC Université Blaise Pascal CNRS/IN2P3 LPSC Université Joseph Fourier Grenoble 1 CNRS/IN2P3 Institut National Polytechnique de Grenoble CPPM Aix-Marseille Université CNRS/IN2P3 LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay LPNHE Universités Paris VI and VII CNRS/IN2P3 CEA Saclay Irfu SPP IPHC Université de Strasbourg CNRS/IN2P3 IPNL Université Lyon 1 CNRS/IN2P3 III. Physikalisches Institut A RWTH Aachen University Physikalisches Institut Universität Freiburg II. Physikalisches Institut Georg-August-Universität Göttingen Institut für Physik Universität Mainz Ludwig-Maximilians-Universität München Panjab University Delhi University Tata Institute of Fundamental Research University College Dublin Korea Detector Laboratory Korea University CINVESTAV Nikhef Science Park Radboud University Nijmegen Joint Institute for Nuclear Research Institute for Theoretical and Experimental Physics Moscow State University Institute for High Energy Physics Petersburg Nuclear Physics Institute Institució Catalana de Recerca i Estudis Avançats (ICREA) Institut de Física d'Altes Energies (IFAE) Uppsala University Taras Shevchenko National University of Kyiv Lancaster University Imperial College London University of Manchester University of Arizona University of California Riverside Florida State University Fermi National Accelerator Laboratory University of Illinois at Chicago Northern Illinois University Northwestern University Indiana University Purdue University Calumet University of Notre Dame Iowa State University University of Kansas Louisiana Tech University Northeastern University University of Michigan Michigan State University University of Mississippi University of Nebraska Rutgers University Princeton University State University of New York University of Rochester Brookhaven National Laboratory Langston University University of Oklahoma Oklahoma State University Oregon State University Brown University University of Texas Southern Methodist University Rice University University of Virginia University of Washington Université de Lyon Augustana College University of Liverpool Deutshes Elektronen-Synchrotron (DESY), Notkestrasse 85 CONACyT SLAC University College London Centro de Investigacion en Computacion IPN Universidade Estadual Paulista Karlsruher Institut für Technologie (KIT) Steinbuch Centre for Computing (SCC) Office of Science U.S. Department of Energy American Association for the Advancement of Science Kiev Institute for Nuclear Research (KINR) University of Maryland European Orgnaization for Nuclear Research (CERN) Purdue University Lebedev Physical Institute Russian Academy of Sciences Universidade Estadual Paulista