4,543 research outputs found
Elliptic Algebra and Integrable Models for Solitons on Noncummutative Torus
We study the algebra and the basis of the Hilbert space in terms of the functions of the positions of solitons. Then
we embed the Heisenberg group as the quantum operator factors in the
representation of the transfer matrice of various integrable models. Finally we
generalize our result to the generic case.Comment: Talk given by Bo-Yu Hou at the Joint APCTP-Nankai Symposium. Tianjin
(PRC), Oct. 2001. To appear in the proceedings, to be published by Int. J.
Mod. Phys. B. 7 pages, latex, no figure
Exotic Neutrino Interactions at the Pierre Auger Observatory
The Pierre Auger Observatory for cosmic rays provides a laboratory for
studying fundamental interactions at energies well beyond those available at
colliders. In addition to hadrons or photons, Auger is sensitive to ultra-high
energy neutrinos in the cosmic radiation and models for new physics can be
explored by observing neutrino interactions at center-of-mass energies beyond
the TeV scale. By comparing the rate for quasi-horizontal, deeply penetrating
air showers triggered by all types of neutrinos with the rate for slightly
upgoing showers generated by Earth-skimming tau neutrinos, any deviation of the
neutrino-nucleon cross-section from the Standard Model expectation can be
constrained. We show that this can test models of low-scale quantum gravity
(including processes such as Kaluza-Klein graviton exchange, microscopic black
hole production and string resonances), as well as non-perturbative electroweak
instanton mediated processes. Moreover, the observed ratios of neutrino flavors
would severely constrain the possibility of neutrino decay.Comment: 32 pages (RevTeX); revised to show rates for both the cosmogenic and
Waxman-Bahcall neutrino flux; to appear in Astroparticle Physic
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