QCD coherence and the soft limit of the energy spectrum

Abstract

The analytical perturbative approach, if taken to the limit of its applicability, allows one to predict an energy independent limit for the one-particle invariant density in QCD jets E dn/d^3p at very small momenta p. This is a direct consequence of the colour coherence in soft gluon branching. The existing data on the charged and identified particle inclusive spectra follow this prediction surprisingly well. Further tests of the perturbatively based picture in the soft region are discussed.

LaTeX2e, 16 pages, 3 figures, uses epsfig.sty

References in corpus (6)

• Measurement of inclusive particle spectra and test of MLLA prediction in $e^{+}{e}^{-}$ annihilation at $\sqrt{s}$=58GeV
• Measurement of multiplicity and momentum spectra in the current fragmentation region of the Breit frame at HERA
• A Study of the Fragmentation of Quarks in $e^{-}p$ Collisions at HERA
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• Soft diffraction at the LHC: a partonic interpretation
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• Limits on R-parity violation from cosmic ray antiprotons
• Coherent Soft Particle Production in Z Decays into Three Jets
• Soft Particle Emission Accompanying Dijet Photoproduction
• Soft particle production and QCD coherence
• Theory of Multiparticle Production in the Soft Region
• Limiting soft particle emission in e+e-, hadronic and nuclear collisions
• Scaling and scale breaking phenomena in QCD jets
• Perturbative universality in QCD jet physics
• Perturbative QCD Description of Mean Jet and Particle Multiplicities in e+e- annihilation