ar X iv : 0 80 8 . 22 17 v 1 [ he p - th ] 1 5 A ug 2 00 8 Scalar QCD 4 on the null - plane

ar X iv : 0 80 3 . 26 77 v 1 [ he p - th ] 1 8 M ar 2 00 8 SQED 4 and QED 4 on the null - plane

We studied the scalar electrodynamics (SQED4) and the spinor electrodynamics (QED4) in the null-plane formalism. We followed the Dirac’s technique for constrained systems to perform a detailed analysis of the constraint structure in both theories. We imposed the appropriated boundary conditions on the fields to fix the hidden subset first class constraints which generate improper gauge transfor...

ar X iv : 0 80 8 . 06 72 v 1 [ he p - ph ] 5 A ug 2 00 8 1 Status of Lattice Studies of the QCD Phase Diagram

Determining the QCD phase diagram is a pressing task in view of its relevance for nuclear and astro-particle physics programmes. We review the current status of lattice calculations of the phase diagram in the (T, μB)-plane for baryon chemical potentials μB < ∼ 500 MeV. At μB = 0, simulations of staggered fermion actions predict the quark hadron transition to be a crossover in the continuum lim...

ar X iv : 0 80 4 . 38 37 v 1 [ he p - ph ] 2 4 A pr 2 00 8 Coulomb gauge approach to scalar hadrons

The Coulomb gauge model, involving an effective QCD Hamiltonian in the Coulomb gauge, is applied to scalar hadrons. Mass predictions are presented for both conventional qq̄ meson and qq̄qq̄ tetra-quark states. Mixing matrix elements between these states were also computed and diagonalized to provide a reasonable description of the scalar spectrum below 2 GeV.

ar X iv : n uc l - th / 0 10 80 18 v 1 8 A ug 2 00 1 1 Photon and Electron induced Particle Production on Nuclei ∗

ar X iv : 0 80 8 . 24 81 v 1 [ he p - th ] 1 8 A ug 2 00 8 MIFP - 08 - 21 USTC - ICTS - 08 - 14 AdS

We obtain a large class of smooth Lorentzian p-brane wormholes in supergravities in various dimensions. They connect two asymptotically flat spacetimes. In cases where there is no dilaton involved in the solution, the wormhole can connect an AdSn × Sm in one asymptotic region to a flat spacetime in the other. We obtain explicit examples for (n,m) = (4, 7), (7, 4), (5, 5), (3, 3), (3, 2). These ...