Gluonic content of the scalar meson nonet in a scaled effective Lagrangian

✍ Scribed by M. Jaminon; B. Van den Bossche

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 443 KB
• Volume: 619
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(97)00166-8

✦ Synopsis

A scaled SU(3) Nambu-Jona-Lasinio Lagrangian is used to compute the mass of the nine scalar mesons in the vacuum and the mass of the glueball. This chiral model provides a gluonic content to the scalar mesons as well as a quark content to the glueball. It is shown that a suitable choice of the vacuum gluon condensate allows reproduction of the experimental masses of the scalar mesons except for /~ (1430). This choice corresponds to a weak coupling between the gluon and quark condensates, giving f0(1500) or fj(1710) which is nearly a pure glueball. (~) 1997 Elsevier Science B.V.