Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Low-lying meson spectroscopy and confinement

Journal Article · · International Journal of Modern Physics A; (United States)
OSTI ID:5735550
; ;  [1]
  1. Leningrad Nuclear Physics Inst., Gatchina, Leningrad 188350 (SU)
+ Show Author Affiliations

The paper is devoted to the construction of low-energy quark-scattering amplitudes. The amplitudes of dressed quarks qq {yields} qq and q{bar q} {yields} q{bar q}(q = u, d, s) are calculated in the framework of the dispersion N/D method with the help of the iteration bootstrap procedure including two types of point-like input interactions, namely the four-fermion interaction with quantum numbers of the gluon and four-fermion interaction induced by instantons (the exchanges of white states with J{sup p} = O{sup {plus minus}}). The mass values of the lowest mesons (J{sup p} = O{sup {minus}}, 1{sup {minus}}, O{sup +}) and their quark content are obtained. In the color meson channel a bound state was found which corresponds to the constituent gluon with the mass M{sub G} = 0.67 GeV. The qq-amplitudes in the color state {bar 3} have the diquark levels with J{sup p} = O{sup +} and the masses m{sub ud} = 0.72 GeV and m{sub ds} = 0.86 GeV. The interaction of dressed quarks appeared to be an effectively short-range one. The calculated amplitudes satisfy the Okubo-Zweig-Iisuka rule.

OSTI ID:
5735550
Journal Information:
International Journal of Modern Physics A; (United States), Journal Name: International Journal of Modern Physics A; (United States) Vol. 6:4; ISSN IMPAE; ISSN 0217-751X
Country of Publication:
United States
Language:
English

Similar Records

Low-energy interaction in the quark model: a calculation of the constituent-gluon mass, of virtual diquark levels, of the masses of mesons of lower multiplets, and of the amplitudes qq. -->. qq and qq-bar. -->. qq-bar
Journal Article · Tue Jul 01 00:00:00 EDT 1986 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States) · OSTI ID:6687700
Bootstrap procedure in the quasinuclear model of quarks
Journal Article · Fri Jul 01 00:00:00 EDT 1983 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States) · OSTI ID:5015726
Masses of tetraquarks with two heavy quarks in the relativistic quark model
Journal Article · Fri Nov 30 23:00:00 EST 2007 · Physical Review. D, Particles Fields · OSTI ID:21023925

Related Subjects

662230* -- Quantum Chromodynamics-- (1992-)
662240 -- Models for Strong Interactions-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
BAG MODEL
BOOTSTRAP MODEL
COMPOSITE MODELS
ELEMENTARY PARTICLES
EXTENDED PARTICLE MODEL
FERMIONS
FIELD THEORIES
INTERACTIONS
LOW-ENERGY THEOREM
MATHEMATICAL MODELS
MESON SPECTROSCOPY
PARTICLE INTERACTIONS
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK CONDENSATION
QUARK MODEL
QUARK-GLUON INTERACTIONS
QUARKONIUM
QUARKS
SCATTERING AMPLITUDES
SPECTROSCOPY