A new possible picture of the hadron structure

Journal Article · Fri May 29 00:00:00 EDT 1998 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.56063· OSTI ID:21185765

Pokrovsky, Yury E ^[1]

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1. Russian Research Center 'Kurchatov Institute', Moscow, 123182 (Russian Federation)

A new chiral-scale invariant version of the bag model (CSB) is developed and applied to calculations of masses and radii for single bag states. The mass formula of the CSB model contains no free parameters and connects masses and radii of the bags with fundamental QCD scales, namely with {lambda}{sub QCD}, <qq-bar>, <G{sup 2}>, and quark masses. For high angular momentum states the CSB model well describes hadron Regge trajectories and predicts thin flux tubes with R{sub tube}{approx_equal}0.25 fm close to the small tube radii introduced a posteriori in modern models. For low angular momentum states this model predicts small radii of the bags R{sub bag}{approx_equal}0.25 fm close to the radii associated with constituent quarks. Masses of the lowest angular momentum bags are obtained close to the data for well known hadron resonances ({pi}(1300), {omega}(1420), N(1440),{delta}(1600), etc.). These resonances are predicted to be almost single bag states. But ground states of SU(3) hadrons (N(940), {pi}(140), etc.) are treated as strongly bounded multi bag states--BagBag-mesons, and BagBagBag-baryons like in the old Fermi, Yang, and Sakata models. As well, this model predicts the low mass excitations of SU(3) hadrons newly observed for nucleons at the following masses 1004, 1044, and 1094 MeV.

• OSTI ID: 21185765
• Journal Information: AIP Conference Proceedings, Vol. 432, Issue 1; Conference: 7. international conference on hadron spectroscopy, Upton, NY (United States), 25-30 Aug 1997; Other Information: DOI: 10.1063/1.56063; (c) 1998 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BAG MODEL
CHIRALITY
DELTA-1600 BARYONS
EXCITATION
GROUND STATES
MASS FORMULAE
MEV RANGE
N-1440 BARYONS
NUCLEONS
OMEGA-1420 MESONS
PARTICLE STRUCTURE
PI-1300 MESONS
QUANTUM CHROMODYNAMICS
QUARKS
REGGE TRAJECTORIES
RESONANCE PARTICLES
REST MASS