2 v 1 4 F eb 1 99 4 NEW TRENDS IN PARTICLE THEORY ∗ Luis

ar X iv : a st ro - p h / 99 02 06 2 v 1 4 F eb 1 99 9 SOURCES OF RELATIVISTIC JETS IN THE GALAXY

ar X iv : h ep - t h / 99 11 19 6 v 3 1 F eb 2 00 2 RG - Improved Three - Loop Effective Potential of the Massive φ 4 Theory

The renormalization group method is applied to the three-loop effective potential of the massive φ4 theory in the MS scheme in order to obtain the next-next-next-to-leading logarithm resummation. For this, we exploit fourloop parts of the renormalization group functions βλ, γm, γφ, and βΛ, which were already given to five-loop order via the renormalization of the zero-, two, and four-point one-...

th / 9 80 20 14 v 1 4 F eb 1 99 8 Shell corrections for finite depth potentials : Particle continuum effects

Shell corrections of finite, spherical, one-body potentials are analyzed using a smoothing procedure which properly accounts for the contribution from the particle continuum, i.e., unbound states. Since the plateau condition for the smoothed single-particle energy seldom holds, a new recipe is suggested for the definition of the shell correction. The generalized Strutinsky smoothing procedure i...

n uc l - th / 9 40 20 01 v 1 1 F eb 1 99 4 Suppression of Hadroproduction in Nuclei ∗

We argue that nuclei are not transparent for fast projectile partons. Color transparency is effective for final state interactions in heavy particle production, though nuclear filtering of initial partons can reduce the cross sections. We show that short-ranged initial state interactions, which have been neglected so far, can be important in hadroproduction. With the present scenario of hadropr...

v 2 9 F eb 1 99 4 USC ( NT ) – 94 – 1 Meson Condensation in Dense Matter

The results for meson condensation in the literature vary markedly depending on whether one uses chiral perturbation theory or the current-algebra-plus-PCAC approach. To elucidate the origin of this discrepancy, we reexamine the role of the sigma-term in meson condensation. We find that the resolution of the existing discrepancy requires a knowledge of terms in the Lagrangian that are higher or...