Quarkonium and Charm Hadrons : New Results on Spectroscopy in BaBar

We report on recent results in spectroscopy from BaBar. This includes the discovery of a new $\Lambda_c$ baryon, detailed studies of the $D^*_{sJ}(2317)^+$, $D_{sJ}(2460)^+$, X(3872) and Y(4260) particles and the first measurement of hadronic non-$B\bar{B}$ decays of the $\Upsilon(4S)$ meson.Comment: 4 pages (5 here), to appear in Proceedings of the XLIst Rencontres de Moriond, QCD and Hadronic Interactions, La Thuile, Italy, 18-25 March 200

Adaptive Perturbation Theory I: Quantum Mechanics

Adaptive perturbation is a new method for perturbatively computing the eigenvalues and eigenstates of quantum mechanical Hamiltonians that heretofore were not believed to be obtainable by such methods. The novel feature of adaptive perturbation theory is that it decomposes a given Hamiltonian, $H$, into an unperturbed part and a perturbation in a way which extracts the leading non-perturbative behavior of the problem exactly. This paper introduces the method in the context of the pure anharmonic oscillator and then goes on to apply it to the case of tunneling between both symmetric and asymmetric minima. It concludes with an introduction to the extension of these methods to the discussion of a quantum field theory. A more complete discussion of this issue will be given in the second paper in this series. This paper will show how to use the method of adaptive perturbation theory to non-perturbatively extract the structure of mass, wavefunction and coupling constant renormalization.Comment: 21 pages, 4 figures, uses psfig.sty. This paper is being replaced to add references to previously published work which I became aware of after posting the original pape

Applications of higher order QCD

In this talk we summarize some recent developments in perturbative QCD and their application to particle physics phenomenology.Comment: 7 pages, 6 figures. Contribution to the proceedings of the international symposium on Physics in Collision 2013 (PIC 2013

Possible Application of Wavefront Coding to the LSST

Wavefront Coding has been applied as a means to increase the effective depth of focus of optical systems. In this note I discuss the potential for this technique to increase the depth of focus of the LSST and the resulting advantages for the construction and operation of the facility, as well as possible drawbacks. It may be possible to apply Wavefront Coding without changing the current LSST design, in which case Wavefront Coding might merit further study as a risk mitigation strategy.Comment: 6 pages, 2 figure

Inclusive Hadronic Results at BaBar: ISR and Pentaquark Searches

We present recent measurements of hadronic cross-sections from the BaBar experiment and report preliminary results on searches for pentaquark states.Comment: 4 pages, 9 postscript figues, contributed to the Proceedings of DAFNE0

Novel Aspects of Hard Diffraction in QCD

Initial- and final-state interactions from gluon-exchange, normally neglected in the parton model have a profound effect in QCD hard-scattering reactions, leading to leading-twist single-spin asymmetries, diffractive deep inelastic scattering, diffractive hard hadronic reactions, and nuclear shadowing and antishadowing--leading-twist physics not incorporated in the light-front wavefunctions of the target computed in isolation. I also discuss the use of diffraction to materialize the Fock states of a hadronic projectile and test QCD color transparency.Comment: Invited talk presented at the XIth International Conference on Elastic and Diffractive Scattering, Chateau de Blois, France, May 15-20, 200

Light Squarks and Gluinos at TeV-scale e+e−e^+e^- Colliders

In the general MSSM, first and second generation squarks and gluinos may be sufficiently light to be produced and studied at $e^+e^-$ colliders operating in the 0.5-1 TeV energy range. After a reminder that the MSSM is {\it not} the same as mSUGRA, we provide a brief overview of these possibilities within this more general frameworkComment: 9 pages, 9 Figs. Talk presented at the 2010 Linear Collider Workshop (LCWS10), Beijing, China, 26-30 March 201

Status of SM calculations of b > s transitions

We report recent progress in SM calculations of $b \to s$ transitions. We discuss the first NNLL prediction of the $\bar B \to X_s \gamma$ branching ratio, including important additional subtleties due to non-perturbative corrections and logarithmically-enhanced cut effects, and also recent results on the inclusive mode $\bar B \to X_s \ell^+ \ell^-$. Moreover, new results on the corresponding exclusive modes are reviewed. Finally, we comment on the present status of the so-called $B \to K \pi$ puzzle in hadronic $b \to s$ transitionsComment: 10 pages, 6 figures, minor changes, published versio

Ultraviolet Behavior of N=8 Supergravity

In these lectures I describe the remarkable ultraviolet behavior of N=8 supergravity, which through four loops is no worse than that of N=4 super-Yang-Mills theory (a finite theory). I also explain the computational tools that allow multi-loop amplitudes to be evaluated in this theory - the KLT relations and the unitarity method - and sketch how ultraviolet divergences are extracted from the amplitudes.Comment: 30 pages, 12 figures; lectures presented at International School of Subnuclear Physics, 47th Course, Erice Sicily, August 29-September 7, 200