/ 95 04 05 1 v 1 1 1 A pr 1 99 5 Chiral and axial anomalies in the framework of generalized

ar X iv : h ep - p h / 94 04 26 5 v 1 1 3 A pr 1 99 4 POSSIBLE EXTENSION OF THE CHIRAL PERTURBATION THEORY PROGRAM

After a brief discussion of how chiral dynamics has evolved from the " universal V-A theory of weak interactions " , we present some evidence that symmetry breaking for the vector meson multiplet is not simpler than but rather analogous to that for the pseudoscalar multiplet. This provides a motivation for speculating on how to extend in a systematic way the chiral perturbation theory program t...

ar X iv : h ep - p h / 99 04 48 7 v 1 2 9 A pr 1 99 9 1 QCD Aspects of Hadron Physics

Several topics in hadron physics at different scales of resolution are discussed. First, deep-inelastic scattering from nucleons and nuclei is viewed in a light-cone coordinate space picture. Then the smooth transition from parton to hadron degrees of freedom is demonstrated by analysing generalized Q-dependent polarizabilities of the nucleon. Turning to low energy QCD we summarize recent devel...

v 1 2 5 A pr 1 99 5 SWAT 95 / 70 “ FASTER THAN LIGHT ” PHOTONS IN GRAVITATIONAL FIELDS – CAUSALITY , ANOMALIES AND HORIZONS

ar X iv : h ep - p h / 05 04 04 2 v 1 6 A pr 2 00 5 Strong interactions at all density

We show using Mean Field Theory that the phase diagram of QCD at finite density (T = 0) is such that chiral symmetry remains spontaeously broken at all density! Talk given at the Recontres Vietnam, Hanoi, August 2004

/ 97 04 41 5 v 1 2 8 A pr 1 99 7 Elastic π N Scattering to O ( p 3 ) in Heavy Baryon Chiral Perturbation Theory ∗

The elastic πN scattering amplitude in the isospin limit is calculated in the framework of heavy baryon chiral perturbation theory, up to the third order. Threshold parameters like scattering lengths, volumes, effective ranges, etc. are compared with data. All relevant low energy constants are fixed from the available pion-nucleon data. A clear improvement in the description of data is observed...