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Stephen Cotanch

Professor Emeritus

Riddick Hall 102



Professor Cotanch received his PhD in 1973 from the Florida State University. He was a visiting graduate student at Princeton University for the 1971-72 year and a postdoctoral research associate at the University of Pittsburgh from 1973 to 1976. He joined NC State University as Assistant Professor in 1976.  In 1985 he was a Visiting Professor at the University of Melbourne, Australia.

Research Description

His research contributions center on many-body techniques to diagonalize effective Hamiltonians, describing the complex behavior of systems of fermions and bosons interacting via the electromagnetic, weak and strong nuclear forces (including Quantum Chromodynamics). He advanced the understanding of the structure of nuclei, hypernuclei and elementary particles, especially exotic glueballs and hybrid mesons containing color confined gluons and quarks. He developed improved scattering and reaction formulations for direct nuclear reactions, photonuclear processes and K meson scattering and production. He also collaborated with experimentalists, including proposed particle measurements and detector design, and he derived several novel constraint relations and theorems from fundamental principles and symmetries to assist experimental analysis.

Honors and Awards

  • He is a Fellow of the American Physical Society, a member of Sigma Xi, Sigma Pi Sigma and Phi Kappa Phi. In 1993 he was awarded a Nordita Nordic Professorship to perform research at the Neil Bohr Institute in Copenhagen and the Universities of Uppsala and Helsinki.

Selected Publications

Coulomb Gauge Model for Hidden Charm Tetraquarks
W. Xie, L. Q. Mo, P. Wang, Stephen R. Cotanch
Phys. Lett. B, 275, (2013), 148

Coupled Channels Optical theorem and Non-elastic Cross Section Sum Rule
Stephen R.Cotanch
Nucl. Phys., A842, (2010), 48

Meson and Tetra-quark Mixing
P. Wang, S. R. Cotanch and I. General
Phys. J., C 55, (2008), 409

Light 1-+ Exotics: Molecular Resonances
Ignacio J. General, Ping Wang, Stephen R. Cotanch, Felipe J. Llanes-Estrada
Phys. Lett. B, 653, (2007), 216

Coulomb Gauge Approach to gqq Hybrid Mesons
Ignacio J. General, Stephen R. Cotanch, Felipe J. Llanes-Estrada
Eur. Phys. J. C, 51, (2007), 347

QCD Coulomb Gauge Approach to Exotic Hadrons
S. R. Cotanch, I. J. General, P. Wang
Eur. Phys. J. A, 31, (2006), 656

Oddballs and a Low Odderon Intercept
Felipe J. Llanes-Estrada, Pedro Bicudo, Stephen R. Cotanch
Phys. Rev. Lett., 96, (0816012006)

Many Body Methods and Effective Field Theory
Thomas Schaefer, Chung-Wen Kao, Stephen R. Cotanch
Nucl. Phys., A762, (2005), 82

Tensor Glueball Photoproduction and Decay
Stephen R.Cotanch, Robert A.Williams
Phys. Lett. B, 621, (2005), 269

BCS and Attractive Hubbard Model Comparative Study
Nathan Salwen, Steven A. Sheets, Stephen R. Cotanch
Phys. Rev. B, 70, (2004), 064511

Hyperfine Meson Splittings: Chiral Symmetry Versus Transverse Gluon Exchange
Llanes Estrada, Felipe José and Cotanch, Stephen R and Szczepaniak, Adam P and Swanson, Eric S
Phys. Rev. C, 70, (2004), 035202

Goldberger-Treiman Criteria for Hyperon Coupling Constants
Ignacio J. General, Stephen R. Cotanch
Phys. Rev. C, 69, (2004), 035202

Ladder Dyson-Schwinger Calculation of the Anomalous γ-3π Form Factor
Stephen R. Cotanch, Pieter Maris
Phys. Rev. D, 68, (2003), 036006

QCD Based Quark Description of π−π Scattering up to the σ and ρ Region
Stephen R. Cotanch and Pieter Maris
Phys. Rev. D, 66, (2002), 116010

Probing Proton Strangeness with Time-Like Virtual Compton Scattering
Stephen R. Cotanch, Robert A. Williams
Phys. Lett. B, 549, (2002), 85

QCD Glueball Regge Trajectory and the Pomeron
Felipe J. Llanes-Estrada, Stephen R. Cotanch, Pedro J. de A. Bicudo, J. Emilio F. T. Ribeiro, Adam P. Szczepaniak
Nucl. Phys., A710, (2002), 45

Chirally Symmetric Quark Description of Low Energy π−π Scattering
Pedro Bicudo, Stephen Cotanch, Felipe Llanes-Estrada, Pieter Maris, Emilio Ribeiro, and Adam Szczepaniak
Phys. Rev. D, 65, (2002), 076008

Relativistic Many-Body Approach to Mesons
Felipe J, Llanes-Estrada, Stephen R. Cotanch
Nucl. Phys., A697, (2002), 303

Many-Body Coulomb Gauge Exotic and Charmed Hybrids
Felipe J. Llanes-Estrada, Stephen R. Cotanch
hys. Lett. B, 504, (2001), 12

Meson Structure in a Relativistic Many-Body Approach
Felipe J. Llanes-Estrada, Stephen R. Cotanch
Phys. Rev. Lett., 84, (2000), 1102

Renormalized Effective QCD Hamiltonian: Gluonic Sector
D. G. Robertson, E. S. Swanson, A. P. Szczepaniak, C.-R. Ji, and S. R. Cotanch
Phys. Rev. D, 59, (1999), 074019

Large Scale Continuum Shell Model Calculations for Photonuclear Reactions with Δ Isobars and Exchange Currents
Stephen R. CotanchThomas B. Bright
Contemporary Nuclear Shell Models, Lecture Notes in Physics (Springer-Verlag) 482, (1997), 172

Nucleon Strangeness Content through Vector Meson Dominance
Stephen R. Cotanch and Robert A. Williams
Phys. Rev. Lett., 77, (1996), 1008

Glueball Spectroscopy in a Relativistic Many-Body Approach to Hadron Structure
Adam Szczepaniak, Eric S. Swanson, Chueng-Ryong Ji, Stephen R. Cotanch
Phys. Rev. Lett., 76, (1996), 2011

Light Quark Energy Distribution in Heavy Quark Symmetry
A. Szczepaniak, C-R. Ji, S.R. Cotanch
Phys. Rev. Lett., 72, (1994), 2538

Simultaneous Microscopic Description of 16O(γ,N) Including Δ Degrees of Freedom
Bright TB, Cotanch SR
Phys. Rev. Lett., 71, (1993), 2563