ar X iv : h ep - p h / 04 01 07 2 v 3 2 3 Ja n 20 04 Cavendish - HEP -

ar X iv : h ep - p h / 04 01 07 2 v 1 1 1 Ja n 20 04 Cavendish - HEP - 04 / 03 The narrow width of the Θ + - a possible explanation

The narrow width of the exotic narrow baryon resonance Θ might be explained by mixing between the two nearly degenerate states that arise in models with two diquarks and an antiquark. The only open Θ decay channel is KN . When two states both coupled to a single dominant decay mode are mixed by the loop diagram via this decay mode, diagonalization of the loop diagram decouples one mass eigensta...

ar X iv : m at h / 04 01 12 6 v 1 [ m at h . N T ] 1 3 Ja n 20 04 THREE LECTURES ON THE RIEMANN ZETA - FUNCTION

ar X iv : h ep - l at / 0 50 10 26 v 2 3 1 Ja n 20 05 NSF - KITP - 05 - 04 BCCUNY - HEP / 05 - 01 LATTICE ( QCD )

We consider a 2 + 1-dimensional SU(N) lattice gauge theory in an axial gauge with the link field U 1 set equal to one. The term in the Hamiltonian containing the square of the electric field in 1-direction is non-local. Despite this non-locality, we show that weak-coupling perturbation theory in this term gives a finite vacuum-energy density to second order, and suggest that this property holds...

ar X iv : a st ro - p h / 04 01 12 2 v 2 1 9 Ja n 20 04 High Energy Gamma - Ray Astronomy

The physics results of high energy γ-ray astronomy are reported, emphasizing recent achievements with ground-based detectors. This includes some of the instrumental developments and latest projects. The fundamental contribution of the field to the question of Cosmic Ray origin is highlighted.

ar X iv : h ep - p h / 01 01 12 2 v 2 2 1 Ja n 20 01

In the coming years, experiments underway will increase the sensitivity to charged lepton flavor violation by four orders of magnitude. These experiments will stringently probe weak scale physics. I review the status of global symmetries in the standard model and present several well-motivated models that predict observable lepton flavor violation. Finally, I describe what we might learn from f...