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Background Enhancement of CPT Reach at an Asymmetric Phi Factory
Nathan Isgur, Alan Kostelecky, Adam Szczepaniak
Photoproduction of neutral-kaon pairs is studied from the perspective of CP and CPT studies. Interference of the P and S waves, with the former due to diffractive phi production an…
Quark-Hadron Duality in Structure Functions
N. Isgur, S. Jeschonnek, W. Melnitchouk +1
While quark-hadron duality is well-established experimentally, the current theoretical understanding of this important phenomenon is quite limited. To expose the essential features…
The origins of quark-hadron duality: How does the square of the sum become the sum of the squares?
Frank E. Close, Nathan Isgur
Bloom-Gilman duality demonstrates empirically that the electroproduction of 's at low momentum transfers averages smoothly around the scaling curve measured at large momentum…
Meson-like Baryons and the Spin-Orbit Puzzle
Nathan Isgur
I describe a special class of meson-like Λ_Q excited states and present evidence supporting the similarity of their spin-independent spectra to those of mesons. I then examine spin…
Nonresonant Semileptonic Heavy Quark Decay
Nathan Isgur
In both the large N_c limit and the valence quark model, semileptonic decays are dominated by resonant final states. Using Bjorken's sum rule in an "unquenched" version of the quar…
Flux Tube Zero-Point Motion, Hadronic Charge Radii, and Hybrid Meson Production Cross Sections
Nathan Isgur
Flux tube zero-point motion produces quark displacements transverse to the flux tube which make significant contributions to hadronic charge radii. In heavy quark systems, these co…