Year: 2007
Type: article
Abstract: We report the first direct observation of the strange $b$ baryon ${\ensuremath{\Xi}}_{b}^{\ensuremath{-}}({\overline{\ensuremath{\Xi}}}_{b}^{+})$. We reconstruct the decay ${\ensuremath{\Xi}}_{b}^{\ensuremath{-}}\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\Xi}}^{\ensuremath{-}}$, with $J/\ensuremath{\psi}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$, and ${\ensuremath{\Xi}}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\Lambda}{\ensuremath{\pi}}^{\ensuremath{-}}\ensuremath{\rightarrow}p{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{\ensuremath{-}}$ in $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$. Using $1.3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data collected by the D0 detector, we observe $15.2\ifmmode\pm\else\textpm\fi{}4.4(\mathrm{stat}{)}_{\ensuremath{-}0.4}^{+1.9}(\mathrm{syst})$ ${\ensuremath{\Xi}}_{b}^{\ensuremath{-}}$ candidates at a mass of $5.774\ifmmode\pm\else\textpm\fi{}0.011(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.015(\mathrm{syst})\text{ }\text{ }\mathrm{GeV}$. The significance of the observed signal is $5.5\ensuremath{\sigma}$, equivalent to a probability of $3.3\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}8}$ of it arising from a background fluctuation. Normalizing to the decay ${\ensuremath{\Lambda}}_{b}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\Lambda}$, we measure the relative rate $\frac{\ensuremath{\sigma}({\ensuremath{\Xi}}_{b}^{\ensuremath{-}})\ifmmode\times\else\texttimes\fi{}\mathcal{B}({\ensuremath{\Xi}}_{b}^{\ensuremath{-}}\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\Xi}}^{\ensuremath{-}})}{\ensuremath{\sigma}({\ensuremath{\Lambda}}_{b})\ifmmode\times\else\texttimes\fi{}\mathcal{B}({\ensuremath{\Lambda}}_{b}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\Lambda})}=0.28\ifmmode\pm\else\textpm\fi{}0.09(\mathrm{stat}{)}_{\ensuremath{-}0.08}^{+0.09}(\mathrm{syst})$.
Source: Physical Review Letters
Authors: V. M. Abazov, B. Abbott, M. Abolins, B. S. Acharya, M. Adams, T. Adams, E. Aguilo, S. H. Ahn, M. Ahsan, G. D. Alexeev, G. Alkhazov, A. Alton, G. Alverson, G. A. Alves, M. Anastasoaie, L. S. Ancu, T. Andeen, S. Anderson, B. Andrieu, M. S. Anzelc, Y. Arnoud, M. Arov, M. Arthaud, A. Askew, B. Åsman, A. C. S. Assis Jesus, O. Atramentov, C. Autermann, C. Avila, C. Ay, F. Badaud, A. Baden, L. Bagby, B. Baldin, D. V. Bandurin, S. Banerjee, P. Banerjee, E. Barberis, A.-F. Barfuss, P. Bargassa, P. Baringer, J. Barreto, J. F. Bartlett, U. Bassler, D. Bauer, S. Beale, A. Bean, M. Begalli, M. Begel, C. Belanger-Champagne, L. Bellantoni, A. Bellavance, J. A. Benitez, S. B. Beri, G. Bernardi, R. Bernhard, L. Berntzon, I. Bertram, M. Besançon, R. Beuselinck, V. A. Bezzubov, P. C. Bhat, V. Bhatnagar, C. Biscarat, G. Blazey, F. Blekman, S. Blessing, D. Bloch, K. Bloom, A. Boehnlein, D. Boline, T. A. Bolton, G. Borissov, K. Bos, T. Bose, A. Brandt, R. Brock, G. Brooijmans, A. Bross, D. Brown, N. J. Buchanan, D. Buchholz, M. Buehler, V. Buescher, S. Burdin, S. Burke, T. H. Burnett, C. P. Buszello, J. M. Butler, P. Calfayan, S. Calvet, J. Cammin, S. Caron, W. Carvalho, B. C. K. Casey, N. M. Cason, H. Castilla-Valdez, S. Chakrabarti, D. Chakraborty, K. M. Chan, K. Chan, A. Chandra, F. Charles, E. Cheu, F. Chevallier, D. K. Cho, S. Choi, B. Choudhary, L. Christofek, T. Christoudias, S. Cihangir, D. Claes, C. Clément, B. Clément, Y. Coadou, M. Cooke, W. E. Cooper, M. Corcoran, F. Couderc, M.-C. Cousinou, S. Crépé-Renaudin, D. Cutts, M. Ćwiok, H. da Motta, A. Das, G. Davies, K. De, S. J. de Jong, P. de Jong, E. De La Cruz-Burelo, C. De Oliveira Martins, J. D. Degenhardt, F. Déliot, M. Demarteau, R. Demina, D. Denisov, S. P. Denisov, S. Desai, H. T. Diehl, M. Diesburg, A. Dominguez, H. Dong, L. V. Dudko, L. Duflot, S. R. Dugad, D. Duggan, A. Duperrin, J. Dyer, A. Dyshkant, M. Eads, D. Edmunds, J. Ellison, V. D. Elvira, Y. Enari, S. Eno, P. Ermolov, H. Evans, A. Evdokimov, V. N. Evdokimov, A. V. Ferapontov, T. Ferbel, F. Fiedler, F. Filthaut, W. Fisher, H. E. Fisk, M. Ford, M. Fortner, H. Fox, S. Fu, S. Fuess, T. Gadfort, C. F. Galea, E. Gallas, E. Galyaev, C. Garcia, A. Garcia-Bellido, V. Gavrilov, P. Gay, W. Geist, D. Gelé, C. E. Gerber, Y. Gershtein, D. Gillberg, G. Ginther, N. Gollub, B. Gómez, A. Goussiou, P. D. Grannis, H. Greenlee, Z. D. Greenwood, E. M. Gregores, G. Grenier, Ph. Gris, J.-F. Grivaz, A. Grohsjean, S. Grünendahl, M. W. Grünewald, J. Guo, F. Guo, P. Gutierrez, G. Gutierrez, A. Haas, N. J. Hadley, P. Haefner, S. Hagopian, J. Haley, I. Hall, R. E. Hall, L. Han, K. Hanagaki, P. Hansson, K. Harder, A. Harel, R. Harrington, J. M. Hauptman, R. Hauser, J. Hays, T. Hebbeker, D. Hedin, J. G. Hegeman, J. M. Heinmiller, A. P. Heinson, U. Heintz, C. Hensel, K. Herner, G. Hesketh, M. D. Hildreth, R. Hirosky, J. D. Hobbs, B. Hoeneisen, H. Hoeth, M. Hohlfeld, S. J. Hong, R. Hooper, S. Hossain, P. Houben, Y. Hu, Z. Hubacek, V. Hynek, I. 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Institutions: Joint Institute for Nuclear Research, University of Oklahoma, Michigan State University, Tata Institute of Fundamental Research, University of Illinois Chicago, Florida State University, University of Alberta, Simon Fraser University, York University, McGill University, Korea University, Kansas State University, Petersburg Nuclear Physics Institute, University of Michigan, Northeastern University, Centro Brasileiro de Pesquisas Físicas, Radboud University Nijmegen, National Institute for Subatomic Physics, Northwestern University, University of Arizona, Centre National de la Recherche Scientifique, Laboratoire de Physique Nucléaire et de Hautes Énergies, Institut National de Physique Nucléaire et de Physique des Particules, Université Joseph Fourier, Laboratoire de Physique Subatomique et de Cosmologie, Louisiana Tech University, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Paris-Saclay - Etablissement de Saclay, CEA Paris-Saclay, Uppsala University, Stockholm University, Lund University, KTH Royal Institute of Technology, Universidade do Estado do Rio de Janeiro, RWTH Aachen University, Universidad de Los Andes, Johannes Gutenberg University Mainz, Laboratoire de Physique de Clermont Auvergne, Université Blaise Pascal, University of Maryland, College Park, Northern Illinois University, Fermi National Accelerator Laboratory, Centre de physique des particules de Marseille, Rice University, University of Kansas, Imperial College London, University of Rochester, Panjab University, University of Freiburg, Lancaster University, Institute for High Energy Physics, Lyon 1 Université, Université de Lyon, Institute of Nuclear Physics of Lyon, Université de Haute-Alsace, Institut Pluridisciplinaire Hubert Curien, University of Nebraska–Lincoln, Boston University, University of Amsterdam, Brown University, The University of Texas at Arlington, Columbia University, University of Virginia, University of Bonn, University of Washington, Ludwig-Maximilians-Universität München, University of Notre Dame, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, University of California, Riverside, Sungkyunkwan University, University of Delhi, University College Dublin, Stony Brook University, Lomonosov Moscow State University, Université Paris-Sud, Laboratoire de l'Accélérateur Linéaire, Indiana University Bloomington, Indiana University, Brookhaven National Laboratory, University of Manchester, Institute for Theoretical and Experimental Physics, Universidade Estadual Paulista (Unesp), Princeton University, California State University, Fresno, University of Science and Technology of China, Iowa State University, Universidad San Francisco de Quito, University of Wuppertal, Czech Technical University in Prague, Charles University, University at Buffalo, State University of New York, Southern Methodist University, Oklahoma State University, Czech Academy of Sciences, FZU - Institute of Physics of the Czech Academy of Sciences, University of Zurich, Lawrence Berkeley National Laboratory, University of California, Berkeley, University of Mississippi, Purdue University Northwest, Universidad de Buenos Aires, Langston University
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, U.S. Department of Energy, Alexander von Humboldt-Stiftung, Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS), Western Canada Research Grid, Augustana College, Department of Science and Technology, Ministry of Science and Technology, India, Science Foundation Ireland, Deutsche Forschungsgemeinschaft, Fundação de Amparo à Pesquisa do Estado de São Paulo, Grantová Agentura České Republiky, Russian Foundation for Basic Research, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Bundesministerium für Bildung und Forschung, Consejo Nacional de Investigaciones Científicas y Técnicas, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Korea Science and Engineering Foundation, Vetenskapsrådet, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Centre National de la Recherche Scientifique, Federal Agency for Science and Innovation, Fundação para o Desenvolvimento da UNESP, Natural Sciences and Engineering Research Council of Canada, Science and Technology Facilities Council, Secretaría de Ciencia y Técnica, Universidad de Buenos Aires, Institut National de Physique Nucléaire et de Physique des Particules, Fermilab
OpenAlex ID: W2124036498