Bumps and poles in the S-matrix: A systematic study of 0 sup ++ and 2 sup ++ mesons plus a molecule approach to the E(1420) in the K K. pi. system

Conference · Thu Nov 16 04:00:00 EST 1989

OSTI ID:5149417

Longacre, R S

The goal of Hadron Spectroscopy is to find the spectrum of states formed by color singlet arrangements of quarks and gluons. Ideally these spectral states are associated with poles of the scattering matrix of hadrons which are the decay channels of the states. For example the {rho} meson is the lowest q{bar q} s-wave, spin one color singlet state and decays into {pi}{sup +}{pi}{sup -}. Since the {rho}decays in a relative p-wave, one finds the {rho} pole in the I = 1 p-wave {pi}{pi} phase shifts. There are forces between quarks and gluons which do not manifest themselves as true resonances and thus cannot be described by a Breit-Wigner pole. I will give some examples that are not Breit-Wigner poles of the scattering matrix but are important bumps in meson production. 22 refs., 10 figs.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5149417
• Report Number(s): BNL-43540; CONF-8909221--5; ON: DE90005566
• Country of Publication: United States
• Language: English

Related Subjects

645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
BOSONS
CHARMONIUM
ELEMENTARY PARTICLES
F0-1590 MESONS
F2-1720 MESONS
HADRONS
INTERACTIONS
J PSI-3097 MESONS
KAONS
MATRICES
MESONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PSEUDOSCALAR MESONS
QUARK-GLUON INTERACTIONS
QUARKONIUM
RADIATIVE DECAY
S MATRIX
SCALAR MESONS
SCATTERING AMPLITUDES
STRANGE MESONS
STRANGE PARTICLES
TENSOR MESONS
VECTOR MESONS