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The Casimir Energy for a Hyperboloid Facing a Plate in the Optical Approximation
O. Schroeder, A. Scardicchio, R. L. Jaffe
We study the Casimir energy of a massless scalar field that obeys Dirichlet boundary conditions on a hyperboloid facing a plate. We use the optical approximation including the firs…
Exotica
R. L. Jaffe
The first evidence for Quantum Chromodynamics (QCD), the theory of the strong interactions, came from the systematics of baryon and meson spectroscopy. An important early observati…
Implications of the Present Bound on the Width of the Theta(1540)
R. L. Jaffe, Ambar Jain
The recently reported Theta(1540) exotic baryon seems to be very narrow: Gamma(Theta)< 1 MeV according to some analyses. Using methods of low energy scattering theory, we develop e…
Comment on hep-ph/0404212 by D. Diakonov, V. Petrov, and M. Polyakov
R. L. Jaffe
In hep-ph/0404212 Diakonov, Petrov, and Polyakov respond to my recent comments on their 1997 paper, ``Exotic anti-decuplet of baryons: prediction from chiral solitons''. Their resp…
A Perspective on Pentaquarks
Robert Jaffe, Frank Wilczek
Recent discoveries of manifestly exotic, narrow baryon resonances present a fundamental challenge for our theoretical understanding of low-energy QCD. This is a brief survey of the…