Published November 18, 2003 | Version v1
Journal article Metadata-only

Scalar Mesons as q-bar2q2? Insight from the Lattice

Creators

  • 1. Physics Department, Washington University CB 1105, St. Louis, Missouri 63130 (United States)
  • 2. Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
  • 3. Center for Theoretical Physics, Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

Description

I describe some insight obtained from a lattice calculation on the possibility that the light scalar mesons are q-bar2q2 states rather than q-barq. First I review some general features of q-bar2q2 states in QCD inspired quark models. Then I describe a lattice QCD calculation of pseudoscalar meson scattering amplitudes, ignoring quark loops and quark annihilation, which finds indications that for sufficiently heavy quarks there is a stable four-quark bound state with JPC = 0++ and non-exotic flavor quantum numbers

Additional details

Identifiers

DOI
10.1063/1.1632207;
arXiv
arXiv:hep-lat/0306037v1;

Publishing Information

Journal Title
AIP Conference Proceedings
Journal Volume
688
Journal Issue
1
Journal Page Range
p. 208-219
ISSN
0094-243X
CODEN
APCPCS

Conference

Title
An interesting puzzle for QCD'
Acronym
High energy physics workshop 'Scalar mesons
Dates
16-18 May 2003
Place
Utica, NY (United States)

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
36068792
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ANNIHILATION; B QUARKS; BOUND STATE; C QUARKS; LATTICE FIELD THEORY; MASS SPECTRA; MESON-MESON INTERACTIONS; PSEUDOSCALAR MESONS; QUANTUM CHROMODYNAMICS; QUANTUM NUMBERS; QUARK MODEL; QUARK-ANTIQUARK INTERACTIONS; RESONANCE PARTICLES; SCALAR MESONS; SCATTERING AMPLITUDES; T QUARKS
Descriptors DEC
AMPLITUDES; BEAUTY PARTICLES; BOSONS; CHARM PARTICLES; COMPOSITE MODELS; CONSTRUCTIVE FIELD THEORY; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; HADRON-HADRON INTERACTIONS; HADRONS; INTERACTIONS; MATHEMATICAL MODELS; MESONS; PARTICLE INTERACTIONS; PARTICLE MODELS; POSTULATED PARTICLES; QUANTUM FIELD THEORY; QUARKS; SPECTRA; TOP PARTICLES

Optional Information

Notes
(c) 2003 American Institute of Physics