• Structure and reactions of pentaquark baryons

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      http://www.ias.ac.in/article/fulltext/pram/066/04/0625-0645

    • Keywords

       

      Pentaquark; quark model; chiral soliton; decay; production.

    • Abstract

       

      We review the current status of the exotic pentaquark baryons. After a brief look at experiments of both positive and negative results, we discuss theoretical methods to study the structure and reactions for the pentaquarks. First we introduce the quark model and the chiral soliton model, where we discuss the relation of mass spectrum and parity with some emphasis on the role of chiral symmetry. It is always useful to picture the structure of the pentaquarks in terms of quarks. As for other methods, we discuss a model-independent method, and briefly mention the results from the lattice and QCD sum rule. Decay properties are then studied in some detail, which is one of the important properties of 𝛩+. We investigate the relation between the decay width and the quark structure having certain spin-parity quantum numbers. Through these analyses, we consider as plausible quantum numbers of 𝛩+, 𝐽𝑃 = 3/2-. In the last part of this note, we discuss production reactions of 𝛩+ which provide links between the theoretical models and experimental information. We discuss photoproductions and hadron-induced reactions which are useful to explore the nature of 𝛩+.

    • Author Affiliations

       

      Atsushi Hosaka1

      1. Research Center for Nuclear Physics, Osaka University, Ibaraki 567-0047, Japan
  • Pramana – Journal of Physics | News

    • Proceedings of the International Workshop/Conference on Computational Condensed Matter Physics and Materials Science
      (IWCCMP-2015)

      Posted on November 27, 2015

      Guest Editors: Anurag Srivastava, C. S. Praveen,
      H. S. Tewari

© 2017 Indian Academy of Sciences, Bengaluru.