English

Total Widths And Slopes From Complex Regge Trajectories

High Energy Physics - Phenomenology 2009-10-31 v1

Abstract

Maximally complex Regge trajectories are introduced for which both Re α(s)\alpha(s) and Im α(s)\alpha(s) grow as s1ϵs^{1-\epsilon} (ϵ\epsilon small and positive). Our expression reduces to the standard real linear form as the imaginary part (proportional to ϵ\epsilon) goes to zero. A scaling formula for the total widths emerges: ΓTOT/M\Gamma_{TOT}/M\to constant for large M, in very good agreement with data for mesons and baryons. The unitarity corrections also enhance the space-like slopes from their time-like values, thereby resolving an old problem with the ρ\rho trajectory in πN\pi N charge exchange. Finally, the unitarily enhanced intercept, αρ0.525\alpha_{\rho}\approx 0.525, \nolinebreak is in good accord with the Donnachie-Landshoff total cross section analysis.

Keywords

Cite

@article{arxiv.hep-ph/9804270,
  title  = {Total Widths And Slopes From Complex Regge Trajectories},
  author = {S. Filipponi and G. Pancheri and Y. Srivastava},
  journal= {arXiv preprint arXiv:hep-ph/9804270},
  year   = {2009}
}

Comments

9 pages, 3 Figures