Areas of Interest
Dr. Cotanch's research broadly addresses theoretical structure and reaction studies
of hadrons, hadronic systems and nuclei. The goal is comprehensive insight by confronting
fundamental field theoretical calculations incorporating important symmetries with precision
data from new and existing accelerators, most notably CEBAF at Jefferson Lab. His program has
four interrelated projects:
- Developing improved renormalizable QCD models incorporating chiral symmetry to
understand the physics of the vacuum and exotic hadron structure, especially tetraquark
systems, hybrid mesons and glueballs, the latter two having explicit gluonic degrees of
freedom;
- QCD quark based relativistic descriptions of meson-meson and photon meson interactions
and reaction processes;
- Electromagnetic studies of strangeness, including proton strangeness, and meson,
particularly kaon, production and radiative capture for proton, deuteron and nuclear
targets forming Λ and Σ hyperons and hypernuclei;
- Many-body and new computational techniques for formulating and diagonalizing effective
Hamiltonians for both hadron and nuclear structure studies as well as condensed matter
systems. Applications, utilizing BCS, TDA, RPA and continuum shell models approaches,
range from quark and gluon condensates and constituents masses to large-scale, supercomputer
based many-body calculations for medium energy photonuclear reactions investigating
exchange currents and nuclear correlations. Hubbard model studies in one and two dimensions,
investigate correlators, long term electron pair ordering and superconductivity.
Nucleon-nucleon effective field theory.
These projects involve continuing collaborations with experimentalists as well as with theorists
at the University Complutense, in Madrid and the Instituto Superior Tecnico in Lisbon.
Recent and Select Publications
"Coupled Channels Optical theorem and Non-elastic Cross Section Sum Rule" Nucl. Phys. A842, 48 (2010).
"Meson and Tetra-quark Mixing" P. Wang, S. R. Cotanch and I. General, Phys. J. C 55, 409 (2008).
"Light 1-+ Exotics: Molecular Resonances" Phys. Lett. B 653, 216 (2007).
"Coulomb Gauge Approach to gqq Hybrid Mesons" Eur. Phys. J. C 51, 347 (2007).
"QCD Coulomb Gauge Approach to Exotic Hadrons" Eur. Phys. J. A 31, 656 (2006).
"Oddballs and a Low Odderon Intercept" Phys. Rev. Lett. 96, 081601(2006).
"Many Body Methods and Effective Field Theory" Nucl. Phys. A762, 82 (2005).
"Tensor Glueball Photoproduction and Decay" Phys. Lett. B 621, 269 (2005).
"BCS and Attractive Hubbard Model Comparative Study" Phys. Rev. B 70, 064511 (2004).
"Hyperfine Meson Splittings: Chiral Symmetry Versus Transverse Gluon Exchange" Phys. Rev. C 70, 035202 (2004).
"Goldberger-Treiman Criteria for Hyperon Coupling Constants" Phys. Rev. C 69, 035202 (2004).
"Ladder Dyson-Schwinger Calculation of the Anomalous γ-3π Form Factor" Phys. Rev. D 68, 036006 (2003).
"QCD Based Quark Description of π−π Scattering up to the σ and ρ Region" Phys. Rev. D 66, 116010 (2002).
"Probing Proton Strangeness with Time-Like Virtual Compton Scattering" Phys. Lett. B 549, 85 (2002).
"QCD Glueball Regge Trajectory and the Pomeron" Nucl. Phys. A710, 45 (2002).
"Chirally Symmetric Quark Description of Low Energy π−π Scattering" Phys. Rev. D 65, 076008 (2002).
"Relativistic Many-Body Approach to Mesons" Nucl. Phys. A697, 303 (2002).
"Many-Body Coulomb Gauge Exotic and Charmed Hybrids" Phys. Lett. B 504, 12 (2001).
"Meson Structure in a Relativistic Many-Body Approach" Phys. Rev. Lett. 84, 1102 (2000).
"Renormalized Effective QCD Hamiltonian: Gluonic Sector" Phys. Rev. D 59, 074019 (1999).
"Large Scale Continuum Shell Model Calculations for Photonuclear Reactions with Δ Isobars and Exchange Currents" Contemporary Nuclear Shell Models, Lecture Notes in Physics (Springer-Verlag) 482, 172 (1997).
"Nucleon Strangeness Content through Vector Meson Dominance" Phys. Rev. Lett. 77, 1008 (1996).
"Glueball Spectroscopy in a Relativistic Many-Body Approach to Hadron Structure" Phys. Rev. Lett. 76, 2011 (1996).
"Light Quark Energy Distribution in Heavy Quark Symmetry" Phys. Rev. Lett. 72, 2538 (1994).
"Simultaneous Microscopic Description of 16O(γ,N) Including Δ Degrees of Freedom" Phys. Rev. Lett. 71, 2563 (1993).
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