Effects of Light Scalar Mesons in eta -> 3pi decay Metadata

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  • Main Title Effects of Light Scalar Mesons in eta -> 3pi decay


  • Author: Abdel-Rehim, Abdou
    Creator Type: Personal
  • Author: Black, Deirdre
    Creator Type: Personal
  • Author: Fariborz, Amir H.
    Creator Type: Personal
  • Author: Schechter, Joseph
    Creator Type: Personal


  • Sponsor: United States. Department of Energy. Office of Energy Research.
    Contributor Type: Organization
    Contributor Info: USDOE Office of Energy Research (ER) (United States)


  • Name: Thomas Jefferson National Accelerator Facility (U.S.)
    Place of Publication: Newport News, Virginia
    Additional Info: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)


  • Creation: 2002-10-01


  • English


  • Content Description: We study the role of a possible nonet of light scalar mesons in the still interesting [eta] -> 3[p]i decay process, with the primary motivation of learning more about the scalars themselves. The framework is a conventional non-linear chiral Lagrangian of pseudoscalars and vectors extended to include the scalars. The parameters involving the scalars were previously obtained to fit the s-wave [pi][pi] and [pi] K scatterings in the region up to about 1 GeV as well as the strong decay [eta]' --> [eta][pi][pi]. At first, one might expect a large enhancement from diagrams including a light [sigma] (560). However there is an amusing cancellation mechanism which prevents this from occurring. In the simplest model there is an enhancement of about 13 per cent in the [eta] -> 3[pi] decay rate due to the scalars. In a more complicated model which includes derivative type symmetry breakers, the cancellation is modified and the scalars contribute about 30 percent of the total decay rate (although the total is not significantly changed). The vectors do not contribute much. Our model produces a reasonable estimate for the related a{sub 0}(980) - f{sub 0}(980) mixing strength, which has been a topic of current debate. Promising directions for future work along the present line are suggested.
  • Physical Description: 1010 Kilobytes pages


  • Keyword: Enantiomorphs
  • Keyword: Decay
  • Keyword: Scalars
  • Keyword: Lagrangian Function
  • Keyword: Pseudoscalars
  • STI Subject Categories: 72 Physics Of Elementary Particles And Fields
  • Keyword: Learning
  • Keyword: Vectors
  • Keyword: Symmetry
  • Keyword: Scalar Mesons
  • Keyword: Cancellation


  • Other Information: No journal information given for this preprint


  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article


  • Text


  • Report No.: JLAB-THY-02-53
  • Report No.: DOE/ER/40150-2287
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 803297
  • Archival Resource Key: ark:/67531/metadc741604