119606264
TWO-LOOP APPROXIMATIONS TO PROPAGATORS IN THE sigma MODEL.
121315857
Color magnetic stability of a dense quark gas
120783806
Limiting Distribution and the Average pi+/- Multiplicities in pi-+p-->pi+/-+ Anything Reactions
119663776
Mass independence of critical exponents in perturbation theory
The suggestion of Dash and Harrington that the critical exponent $gamma$ at the fixed point may be found in perturbation theory by its independence of the mass is investigated in the Reggeon calculus and in phi$sup 4$ theory in three dimensions (phi$sup 4$)$sub 3$. We discuss an ambiguity due to the choice of energy scale and find an invariant criterion for determining the point of mass independence. Neither the Reggeon calculus nor (phi$sup 4$)$sub 3$ satisfies this criterion, and no natural choice of energy scale works for (phi$sup 4$)$sub 3$ in second order. (AIP)
122023172
STUDY OF THE HYPOTHESIS OF THRESHOLD DOMINANCE IN A RENORMALIZED LINEAR sigma MODEL.
We examine Li and Pagels's hypothesis of threshold dominance (h.t.d.) in a linear SU(2) \ifmmode\times\else\texttimes\fi{} SU(2) $\ensuremath{\sigma}$ model renormalized up to one loop. The exact inverse two-point functions ($\ensuremath{\sigma}$ and $\ensuremath{\pi}$ inverse propagators) at zero momentum transfer are calculated. These values are compared with that obtained by following the h.t.d. procedure. The threshold-dominance values show a sensitive dependence on the "cutoff," and the error ranges from 8% to 43%.
117622769
Calculation of K02-->pi+pi-gamma Decay as a Consistency Test of a Current-Current Quark Model
117644748
Multi-channel dynamics for the Y1*(1660) resonant state
SummaryThe channels BP, Y0*(1405)P and BV are included in a dispersion calculation, in a simplified pole approximation, for the 3/2− baryon resonances. The Y1*(1660) is found to be consistent with the γ-octet assignment with a calculated total width of 46 MeV.RiassuntoSi includono i canali BP, Y0*(1405) P e BV in un calcolo di dispersione, in una approssimazione semplificata dei poli, per le risonanze barioniche 3/2−. Si trova che Y1*(1660) corrisponde all'assegnazione all'ottetto γ con un'ampiezza totale calcolata di 46 MeV.РезюмеКаналы BP, Y0*(1405)P и BV вклучаются в дисперсионное вычисление, в упрощенное полюсное приближение, для 3/2− барионных резонансов. Найдено. что Y1*(1660) согласуется с заданием γ-октета с вычисленной полной шириной 46 МэВ.
96470735
A new power series for the charge multiplicity
SummaryFrom the Q2 evolution of the fragmentation functions, a power series in In In θ2/A2 for the multiplicity is derived. The power series is then used to fit the charge multiplicity in the electropositron annihilation at 1.435 s Bc.m. s 31.6 GeV. The results are reasonably good.
121449664
DIVERGENT VERTICES AND ANOMALOUS DIMENSIONS.