rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Search for the Pentaquark Θ+ via the π−p → K−X Reaction at J-PARC
  name:
    name part: Moritsu, Manabu.
    role:
      role term: creator
    role:
      role term: author.
  name:
    name part: SpringerLink (Online service)
  type of resource: text
  origin info:
    place:
      place term: si
    date issued: 2016
    edition: 1st ed. 2016.
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: electronic
    form: electronic resource
    reformatting quality: access
    form: remote
    extent: XIII, 123 p. 86 illus., 48 illus. in color. online resource.
  abstract: This theses reports on an experimental search for an exotic hadron, Θ+(1540) pentaquark, which is a genuine exotic hadron with a five-quark system of uuddsbar. The results of this book support that the existence of Θ+ was strongly constrained. The Θ+ pentaquark was searched for via the π- p → K- X reaction using a beam momentum of 2.01 GeV/c at the J-PARC hadron experimental facility, taking advantage of high-statistics and high-resolution compared with previous experiments, some of which claimed the evidence of Θ+. In order to realize a good missing-mass resolution of 2 MeV, the beam spectrometer and superconducting kaon spectrometer were constructed. No clear peak was observed in the missing mass spectrum of the π- p → K- X reaction, and the upper limit of the production cross section was found to be less than 0.28 μb/sr at the 90% confidence level in a mass region of 1500–1560 MeV/c2. This upper limit is an order of magnitude smaller than that of the previous KEK experiment. Compared with a theoretical calculation using the effective Lagrangian approach, the decay width of Θ+ was evaluated. The upper limits on the decay width were estimated to be 0.36 and 1.9 MeV for the Θ+ spin-parity of 1/2+ and 1/2-, respectively. These are quite small for a width of ordinary hadron resonances, and the existence of Θ+ was strongly constrained and is doubtful.
  table of contents: Introduction to Pentaquark Search -- Experimental Apparatus -- Data Analysis -- Results -- Discussion -- Conclusion -- Appendix.
  note: by Manabu Moritsu.
  subject:
    topic: Physics
  subject:
    topic: Nuclear physics
  subject:
    topic: Heavy ions
  subject:
    topic: Hadrons
  subject:
    topic: Physical measurements
  subject:
    topic: Measurement
  subject:
    topic: Physics
  subject:
    topic: Nuclear Physics, Heavy Ions, Hadrons
  subject:
    topic: Measurement Science and Instrumentation
  classification: QC770-798
  classification: QC702.7.H42
  classification: QC793.5.H32-793.5.H329
  classification: 539.7092
  related item:
    title info:
      title: Springer eBooks
  related item:
    title info:
      title: Springer Theses, Recognizing Outstanding Ph.D. Research
  identifier: 9789811000126
  identifier: http://dx.doi.org/10.1007/978-981-10-0012-6
  record info:
    record creation date: 160217
    record change date: 20160219021143.0
    record identifier: 978-981-10-0012-6