RT Book, Section
T1 Mesons and hybrids in a relativistic many body theory
A1 Llanes Estrada, Felipe José
A1 Cotanch, Stephen R.
AB Using a field theoretical, QCD inspired Hamiltonian formulated in the Coulomb gauge, relativistic many-body calculations are reported which reproduce the semiquantitative features of the observed meson and lattice glueball spectrums. Dynamical chiral symmetry breaking is achieved utilizing a BCS vacuum ansatz, yielding gap equations and realistic quark (and gluon) constituent masses and condensates. The excited hadron states are obtained by diagonalizing the effective Hamiltonian in a truncated Fock space using both the TDA and RPA. The meson spectrum, for a variety of spin and parities, is reasonably well described. In general, the two approaches differ minimally, except for the TT and 77 where only the RPA yields correct properties and a Goldstone boson in the chiral limit. Our unified model also describes hybrids and a three-body TDA calculation predicts exotic and non-exotic hybrid states all above 2 GeV. Our results are consistent with lattice and flux tube hybrid masses, suggesting that the recently observed 1~+ exotics below 2 GeV have an alternative, perhaps four quark, structure.
PB American Institute of Physics
SN 1-56396-978-5
YR 2000
FD 2000
LK https://hdl.handle.net/20.500.14352/60817
UL https://hdl.handle.net/20.500.14352/60817
LA eng
NO 1. A. P. Szczepaniak, E. S. Swanson, C.-R. Ji, and S. R. Cotanch, Phys. Rev. Lett. 76, 2011 (1996).2. F. J. Llanes-Estrada and S. R. Cotanch, Phys. Rev. Lett. 84, 1102 (2000) and references therein.3. G. S. Adams et al. (E852 Collaboration) Phys. Rev. Lett. 81, 5760 (1998); D. R. Thompson et al. (E852 Collaboration) Phys. Rev. Lett. 79, 1630 (1997).4. C. McNeile, hep-lat/9904013 (1999).
NO © 2000 American Institute of Physics.This work is supported by grants DOE DE-FG02-97ER41048 and NSF INT- 9807009. Supercomputer time is provided by NERSC.Conference on Intersections of Particle and Nuclear Physics (7.2000.Quebec, Canada)
NO DOE
NO NSF
DS Docta Complutense
RD 27 jul 2024