Scholar iON
Academic Synthesis
The selected body of research presents diverse explorations within the realm of theoretical physics, focusing on geo-neutrinos, QCD, quantum field theory, and gravitational effects on photons. Fiorentini et al. (2004) delve into the production of geo-neutrinos, emphasizing the need for refined models to assess the radiogenic heat contribution to Earth's mantle, suggesting significant advancements in understanding terrestrial heat dynamics. Narison (2009) pays tribute to Francisco Yndurain and his contributions to light scalar mesons within QCD, highlighting the intersections in the study of particle physics. Son (2007) engages in the discourse on quantum field theory, specifically critiquing the concept of a "most perfect fluid," showcasing the ongoing debates concerning theoretical consistency. Okun (2000) examines the impact of static gravitational fields on photon properties, contributing to the foundational understanding of photon-gravity interactions. Collectively, these papers underscore the dynamic and multifaceted nature of research in high-energy physics, where both theoretical advancements and experimental validations play crucial roles.
In preparation to the experimental results which will be available in the future, we consider geo-neutrino production in greater detail than in [F. Mantovani et al., arXiv:hep-ph/0309013], putting the basis for a more refined model. We study geo-neutrino production for different models of matter circulation and composition in the mantle. By using global mass balance for the Bulk Silicate Earth, the predicted flux contribution from distant sources in the crust and in the mantle is fixed within +-15% (full range). A detailed geological and geochemical investigation of the region near the detector has to be performed, for reducing the flux uncertainty from fluctuations of the local abundances to the level of the global geochemical error. A five-kton detector operating over four years at a site relatively far from nuclear power plants can measure the geo-neutrino signal with 5% accuracy (1 sigma). It will provide a crucial test of the Bulk Silicate Earth and a direct estimate of the radiogenic contribution to terrestrial heat.
This part of the talk aims to present briefly the biodata and the exceptional career of Paco Yndurain who left us suddenly in June 2008. The scientific part: Light Scalar Mesons in QCD is published in the proceedings of QCD 08 (Montpellier 7-12th july 2008: arXiv:0811.0563 [hep-ph]).
This is a comment on hep-th/0702136
The influence of static gravitational field on frequency, wave-length and velocity of photons and on the energy levels of atoms and nuclei is considered in the most elementary way. The interconnection between these phenomena is stressed.
An error in the calculation of the Coulomb coupling parameter of the quark-gluon plasma is corrected.
The functional Schrodinger picture formulation of quantum field theory and the variational Gaussian approximation method based on the formulation are briefly reviewed. After presenting recent attempts to improve the variational approximation, we introduce a new systematic method based on the background field method, which enables one to compute the order-by-order correction terms to the Gaussian approximation of the effective action.
We show that the F-theory dual of the heterotic string with unbroken Spin(32)/Z_2 symmetry in eight dimensions can be described in terms of the same polyhedron that can also encode unbroken E_8\times E_8 symmetry. By considering particular compactifications with this K3 surface as a fiber, we can reproduce the recently found `record gauge group' in six dimensions and obtain a new `record gauge group' in four dimensions. Our observations relate to the toric diagram for the intersection of components of degenerate fibers and our definition of these objects, which we call `tops', is more general than an earlier definition by Candelas and Font.
In this note we show that Jackson's criticism (hep-ph/0203076) of our work "Necessity of simultaneous co-existence of..." is based on an inexact understanding of the basic assumptions and conclusions of our work.