Ralph Amado
 Prof. Emeritus
 At University of Pennsylvania since 1959
 Professor of Physics, University of Pennsylvania
 Vice Provost for Research, University of Pennsylvania
D. Phil., Oxford (1957)
One of the fundamental questions of nuclear theory is how the modern picture of
the strong interactions based on quantum chromodynamics (QCD) accounts for
nuclear physics both in nuclei and in reactions such as nucleon antinucleon
annihilation. We are studying this problem by focusing on classical theories
that reflect the structure of nonperturbative QCD and in which the nucleons
appear as solitonlike solutions. We then reintroduce the leading quantum
corrections. This approach has led to a correct accounting of the principal
features of the nucleonnucleon interaction, including the midrange attraction.
It also gives a remarkable, integrated and simple account of the features of
nucleon antinucleon annihilation, particularly the branching ratios. We are
applying similar ideas to energetic heavy ion collisions where the final pion
fields may be approximated classically.
I am also interested in general
scattering theory and in algebraic approaches to dynamical problems.
 N.R. Walet and R.D. Amado, "Skyrmions and the Nuclear Force" Phys. Rev. C47, 498 (1993)
 R.D. Amado and I.I. Kogan, "Quantum Penomenology for the Disoriented Chiral Condensate," Phys. Rev. D51, 1587 (1995)
 R.D. Amado, R. Bijker, F. Cannata, JP. Dedonder and N.R. Walet, "Quartets of Superdeformed Bands and Supersymmetry Breaking," Int. J. of Mod. Phys. E3, 171 (1994)
 Yang Lu and R.D. Amado, "NN Annihilations in Large Nc QCD with p and w mesons," Phys. Rev. C52, 2158 (1995).
Events

High Energy Theory seminar
February 25, 2019  2:00 pm
Rouven Essig, Stony Brook University
David Rittenhouse Laboratory, 2N36

Special Seminar: "This Is Not A Diversity Talk"
February 26, 2019  4:00 pm
John Asher Johnson, Harvard University
David Rittenhouse Laboratory, A8

Condensed Matter seminar: "Delving Into the Nanoscale World With ThinFilm Nanofluidic Devices"
February 27, 2019  4:00 pm
Jason R. Dwyer, University of Rhode Island
David Rittenhouse Laboratory, A4