E (1420) meson as a K K. pi. molecule

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.42.874· OSTI ID:6783653

Longacre, R S ^[1]

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1. Brookhaven National Laboratory, Upton, NY (USA)

In this article an experimental summary of the {ital E}(1420) meson with {ital J}{sup {ital P}{ital C}}=1{sup ++} is presented and it is argued that the {ital E}(1420) is not explained by QCD in terms of being a fundamental arrangement of quarks and gluons. We then develop a final-state rescattering mechanism based on one-particle-exchange Born terms. We sum these Born terms through a Fredholm integral equation and obtain a Fredholm determinant which shows an enhancement at the {ital E}(1420) with {ital J}{sup {ital P}{ital C}}=1{sup ++}. The subsequent sum of Born terms is analogous to a {pi} orbiting in a {ital p} wave around an {ital s}-wave {ital K{bar K}} system. This represents the first example of a molecular state which is bound by color-singlet particle exchanges, as opposed to work by Weinstein and Isgur, which uses color forces to bind their molecule. A phenomenological analysis of all the latest {ital K{bar K}}{pi} data arising from hadroproduction argues that the molecular picture for the {ital E}(1420) is consistent. We show that if the molecular nature for the {ital E}(1420) is generated by the above final-state Born terms, an exotic {ital K}{sup +}{ital {bar K}}{sub 0}{ital K}{sup +} {ital J}{sup {ital P}}=0{sup {minus}} molecule must exist at the {ital K{bar K}K} threshold.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6783653
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 42:3; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645204 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
645400* -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
ANTIKAONS
ANTIMATTER
ANTIPARTICLES
AXIAL VECTOR MESONS
BOSON-EXCHANGE MODELS
BOSONS
COLOR MODEL
COMPOSITE MODELS
ELEMENTARY PARTICLES
EQUATIONS
F1-1420 MESONS
FERMIONS
FREDHOLM EQUATION
GLUONS
HADRONS
INTEGRAL EQUATIONS
INTERACTIONS
KAONS
MATHEMATICAL MODELS
MESONS
MOLECULAR MODELS
OBE MODEL
OPE MODEL
P WAVES
PARITY
PARTIAL WAVES
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PERIPHERAL MODELS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUARK MODEL
QUARKS
S WAVES
SPIN
STRANGE MESONS
STRANGE PARTICLES