Supersymmetry on the lattice

Lattice results in supersymmetry are summarized. Past, present and future perspectives are discussed.Comment: 13 pages, 4 figures, Plenary Talk at Lattice 2002(plenary), MIT, USA. Typos correcte

Constrained Curve Fitting

We survey techniques for constrained curve fitting, based upon Bayesian statistics, that offer significant advantages over conventional techniques used by lattice field theorists.Comment: Lattice2001(plenary); plenary talk given by G.P. Lepage at Lattice 2001 (Berlin); 9 pages, 5 figures (postscript specials

MESON2000 Conference Summary

This short contribution is a {\it lite} MESON2000 conference summary. As appropriate for the 600th anniversary of the Jagellonian University, it begins with a brief summary of the last 600 years of European history and its place in hadron physics. Next a ``physicist chirality'' order parameter PC is introduced. When applied to MESON2000 plenary speakers this order parameter illustrates the separation of hadron physicists into disjoint communities. The individual plenary talks in MESON2000 are next sorted according to the subconference associated with each of the 36 plenary speakers. Finally, I conclude with a previously unreported Feynman story regarding the use of models in hadron physics.Comment: 11 pages, 3 figures, uses appolb.cps and epsfig. MESON2000 Conference Summary Tal

Chiral perturbation theory, dispersion relations and final state interactions in K -> pi pi

We discuss the recent literature on the treatment of final state interactions in K -> pi pi. Various approaches are compared and particular emphasis is given to the possibility of combining dispersive methods with lattice input. Recent results on the dependence of various quantities on the quark masses at order p^6 in the chiral expansion are presented and the relevance for the lattice calculations is discussed.Comment: Lattice2001(plenary) 10 pages, 6 figures, Invited plenary talk at Lattice 2001, Berlin, august 200

Dark Energy and Cosmology

Understanding the space of possible theoretical explanations for the observed cosmic acceleration is a central challenge of modern cosmology. This brief document sketches selected aspects of approaches to this problem, focusing on the possibility that a modification to General Relativity is responsible for acceleration, as presented as a plenary talk at the ICHEP 2012 conference.Comment: 11 pages, invited plenary presentation delivered at the ICHEP 2012 conference. arXiv admin note: text overlap with arXiv:1105.0721, arXiv:1011.0861, arXiv:astro-ph/060751

Spectrum of the Hermitian Wilson Dirac operator

Recent results on the spectral properties of the Hermitian Wilson-Dirac operator are presented.Comment: 6 pages, 6 Postscript figures, LATTICE 98 (plenary

Triviality and the Higgs mass lower bound

In the minimal Standard Model, it is commonly believed that the Higgs mass cannot be too small, otherwise Top quark dynamics makes the Higgs potential unstable. Although this Higgs mass lower bound is relevant for current phenomenology, we show that the Higgs vacuum instability in fact does not exist and only appears when treating incorrectly the cut-off in the renormalization of a trivial theory. We also demonstrate how to calculate correctly the regulator-dependent Higgs mass lower bound.Comment: Plenary talk presented at Lattice2004(plenary), Fermilab, June 21-26, 2004; 7 pages, 10 figure