Soft particle production and QCD coherence
V. A. Khoze (1,2), S. Lupia (3), W. Ochs (3) ((1) Univ. of Durham, (2), Inst. Nucl. Phys., St. Petersburg, (3) Max-Planck-Inst. fuer Physik, Munich)
TL;DR
This paper investigates the energy spectrum of particles in jets at very low momenta, demonstrating that QCD coherence effects and the LPHD hypothesis accurately predict the observed spectra, thus supporting the perturbative QCD approach.
Contribution
It provides experimental evidence supporting QCD coherence and the LPHD hypothesis for soft particle production in jets at low momenta.
Findings
Charged and identified particle spectra follow QCD coherence predictions
Supports the validity of the LPHD hypothesis at low momenta
Discusses further tests of the perturbative approach
Abstract
We discuss the behaviour of the energy spectrum of particles in jets near the limit of small momenta of a few hundred MeV. In QCD parton cascades the soft gluons are coherently emitted from all faster partons in the jet and their production rate is predicted to scale. The observed charged and identified particle spectra follow this behaviour surprisingly well supporting of the hypothesis of the Local Parton Hadron Duality (LPHD) for this extreme limit. Further tests of this perturbative approach are discussed.
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Taxonomy
TopicsComplex Systems and Time Series Analysis