Glueball spectrum and hadronic processes in low-energy QCD

✍ Scribed by Marco Frasca

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 156 KB
• Volume: 207-208
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/j.nuclphysbps.2010.10.051

✦ Synopsis

Low-energy limit of quantum chromodynamics (QCD) is obtained using a mapping theorem recently proved. This theorem states that, classically, solutions of a massless quartic scalar field theory are approximate solutions of Yang-Mills equations in the limit of the gauge coupling going to infinity. Low-energy QCD is described by a Yukawa theory further reducible to a Nambu-Jona-Lasinio model. At the leading order one can compute glue-quark interactions and one is able to calculate the properties of the σ and η -η mesons. Finally, it is seen that all the physics of strong interactions, both in the infrared and ultraviolet limit, is described by a single constant Λ arising in the ultraviolet by dimensional transmutation and in the infrared as an integration constant.