Observation of X(3872) production in pp collisions at ?s=7 TeV\sqrt{s}=7\mbox{~TeV}

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• 作者：The LHCb Collaboration (1) joel.bressieux@epfl.ch
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• 刊名：The European Physical Journal C - Particles and Fields
• 出版年：2012
• 出版时间：May 2012
• 年：2012
• 卷：72
• 期：5
• 页码：DOI: 10.1140/epjc/s1
• 全文大小：571.3 KB
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• 作者单位：1. CERN, 1211 Geneva 23, Switzerland2. Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil3. Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil4. Center for High Energy Physics, Tsinghua University, Beijing, China5. LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France6. Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand, France7. CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France8. LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France9. LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France10. Fakult?t Physik, Technische Universit?t Dortmund, Dortmund, Germany11. Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany12. Physikalisches Institut, Ruprecht-Karls-Universit?t Heidelberg, Heidelberg, Germany13. School of Physics, University College Dublin, Dublin, Ireland14. Sezione INFN di Bari, Bari, Italy15. Sezione INFN di Bologna, Bologna, Italy16. Sezione INFN di Cagliari, Cagliari, Italy17. Sezione INFN di Ferrara, Ferrara, Italy18. Sezione INFN di Firenze, Firenze, Italy19. Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy20. Sezione INFN di Genova, Genova, Italy21. Sezione INFN di Milano Bicocca, Milano, Italy22. Sezione INFN di Roma Tor Vergata, Roma, Italy23. Sezione INFN di Roma La Sapienza, Roma, Italy24. Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands25. Nikhef National Institute for Subatomic Physics and Vrije Universiteit, Amsterdam, The Netherlands26. Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraców, Poland27. AGH University of Science and Technology, Kraców, Poland28. Soltan Institute for Nuclear Studies, Warsaw, Poland29. Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania30. Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia31. Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia32. Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia33. Institute for Nuclear Research of the Russian Academy of Sciences (INR RAN), Moscow, Russia34. Budker Institute of Nuclear Physics (SB RAS) and Novosibirsk State University, Novosibirsk, Russia35. Institute for High Energy Physics (IHEP), Protvino, Russia36. Universitat de Barcelona, Barcelona, Spain37. Universidad de Santiago de Compostela, Santiago de Compostela, Spain38. European Organization for Nuclear Research (CERN), Geneva, Switzerland39. Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland40. Physik-Institut, Universit?t Zürich, Zürich, Switzerland41. NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine42. Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine43. H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom44. Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom45. Department of Physics, University of Warwick, Coventry, United Kingdom46. STFC Rutherford Appleton Laboratory, Didcot, United Kingdom47. School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom48. School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom49. Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom50. Imperial College London, London, United Kingdom51. School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom52. Department of Physics, University of Oxford, Oxford, United Kingdom53. Syracuse University, Syracuse, NY, United States54. CC-IN2P3, CNRS/IN2P3, Lyon-Villeurbanne, France55. Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil56. University of Birmingham, Birmingham, United Kingdom57. Physikalisches Institut, Universit?t Rostock, Rostock, Germany
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Elementary Particles and Quantum Field Theory
  Nuclear Physics, Heavy Ions and Hadrons
  Physics beyond the Standard Model
  Measurement Science and Instrumentation
  Astronomy, Astrophysics and Cosmology
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1434-6052

文摘

Using 34.7 pb?1 of data collected with the LHCb detector, the inclusive production of the X(3872) meson in pp collisions at ?s=7 TeV\sqrt{s}=7\mbox{~TeV} is observed for the first time. Candidates are selected in the X(3872)→J/ψπ + π ? decay mode, and used to measure m_X(3872) = 3871.95 ±0.48 (stat) ±0.12 (syst) MeV/c2m_{X(3872)} = 3871.95 \pm0.48 \ (\mathrm{stat}) \pm0.12 \ (\mathrm {syst})\ \mathrm{MeV}/c^2