ar X iv : h ep - p h / 95 10 44 5 v 1 3 0 O ct 1 99 5 DOUBLE SCALING OF ANGULAR CORRELATIONS INSIDE JETS a Wolfgang Ochs

ar X iv : h ep - p h / 01 10 29 5 v 1 2 3 O ct 2 00 1 Theory of Multiparticle Production in the Soft Region

We review theoretical and experimental advances in the application of the perturbative QCD approach to the description of particle distributions in jets in the (semi) soft region with particular emphasis on HERA physics.

ar X iv : h ep - p h / 99 10 31 9 v 1 1 3 O ct 1 99 9 Soft Limits of Multiparticle Observables and Parton

We discuss observables in multiparticle production for three kinds of limits of decreasing kinematical scales: 1. the transition jet → hadron (limit ycut → 0 of the resolution parameter ycut); 2. single particle inclusive distributions normalized at threshold √ s → 0 and 3. particle densities in the limit of low momentum p, pT → 0. The observables show a smooth behaviour in these limits and fol...

ar X iv : h ep - p h / 96 03 29 4 v 1 1 3 M ar 1 99 6 Energy Conservation Constraints on Multiplicity Correlations in QCD Jets ∗

We compute analytically the effects of energy conservation on the self-similar structure of parton correlations in QCD jets. The calculations are performed both in the constant and running coupling cases. It is shown that the corrections are phenomenologically sizeable. On a theoretical ground, energy conservation constraints preserve the scaling properties of correlations in QCD jets beyond th...

ar X iv : h ep - p h / 95 10 33 7 v 1 1 8 O ct 1 99 5 BARI - TH / 95 - 217 Υ ( 4 S ) →

We give an estimate of the C-even B 0 ¯ B 0 background coming from the radia-tive decay Υ(4S) → B 0 ¯ B 0 γ at B-factories. Our result B(Υ(4S) → B 0 ¯ B 0 γ) ≃ 3× 10 −9 shows that such background could be safely neglected in the analyses of CP violating effects.

ar X iv : h ep - p h / 98 10 33 5 v 1 1 3 O ct 1 99 8 Gamma - Ray Bursts and Dark Matter - a joint origin ?