ar X iv : h ep - t h / 01 09 02 1 v 1 4 S ep 2 00 1 Exceptional boundary states at c = 1

ar X iv : h ep - t h / 01 09 02 1 v 2 1 9 Se p 20 01 Exceptional boundary states at c = 1 Romuald

We consider the CFT of a free boson compactified on a circle, such that the compactification radius R is an irrational multiple of Rselfdual. Apart from the standard Dirichlet and Neumann boundary states, Friedan suggested [1] that an additional 1-parameter family of boundary states exists. These states break U(1) symmetry of the theory, but still preserve conformal invariance. In this paper we...

ar X iv : h ep - t h / 01 03 09 3 v 1 1 3 M ar 2 00 1 Physical Aspects of the Space - Time Torsion

ar X iv : h ep - p h / 00 09 02 3 v 1 4 S ep 2 00 0 1 Isospin symmetry breaking and direct CP violation in B →

We discuss the isospin symmetry breaking quantity ∆ ±0 ≡ Γ(B ± → ρ ± γ)/2Γ(B 0 → ρ 0 γ)−1, and the direct CP violation in B ± → ρ ± γ within and beyond the standard model. After showing that the leading-order calculation would be a good approximation in such models, we argue that measurements of these quantities would be able to disentagle physics beyond the standard model.

ar X iv : h ep - p h / 01 02 09 4 v 1 8 F eb 2 00 1 New Physics Working Group Summary of LCWS 2000 @ FNAL

Here I summarize P5-WG (New/Alternative Physics Working Group) of LCWS2000@FNAL, held on Oct 24-28, 2000. There were 13 talks altogether, 7 talks on collider signals from new particles/interactions and 6 talks on extra dimensional physics. We had very active and hot discussions among participants for those new/alternative physics/ideas. In bottom table, I show those 13 speakers' names and titles.

ar X iv : h ep - t h / 98 09 02 8 v 1 4 S ep 1 99 8 The continuum limit of the integrable open XYZ spin - 1 / 2 chain

We show that the continuum limit of the integrable XYZ spin-1/2 chain on a half-line gives rise to the boundary sine-Gordon theory using the perturbation method. PACS numbers: 05.50.+q, 11.10.Kk, 75.10.Jm