Experimental momentum spectra of identified hadrons at $e^+e^-$
  colliders compared to QCD calculations

C.P. Fong; E.R. Boudinov; N. C. Br�mmer; N.C. Brümmer; The ARGUS collaboration at DORIS; The CLEO collaboration at CESR; The DELPHI collaboration; The DELPHI collaboration; The HRS collaboration at PEP; The JADE collaboration at PETRA; The L3 collaboration; The L3 collaboration; The L3 collaboration; The OPAL collaboration; The OPAL collaboration; The OPAL collaboration; The TASSO collaboration at PETRA; The TPC collaboration at PEP; Ya.I. Azimov; Yu. L. Dokshitzer; Yu.L. Dokshitzer; Yu.L. Dokshitzer; Yu.L. Dokshitzer; Yu.L. Dokshizer

slides

Experimental momentum spectra of identified hadrons at $e^+e^-$ colliders compared to QCD calculations

Abstract

Experimental data on the shape of hadronic momentum spectra are compared to theoretical predictions in the context of calculations in the Modified Leading Log Approximation (MLLA), under the assumption of Local Parton Hadron Duality (LPHD). Considered are experimental measurements at

e^+e^-

-colliders of

\xi_p^*

, the position of the maximum in the distribution of

\xi_p=\log(1/x_p)

, where

x_p=p/p_{beam}

. The parameter

\xi_p^*

is determined for various hadrons at various centre of mass energies. The dependence on the hadron type poses some interesting questions about the process of hadron-formation. The dependence of

\xi^*_p

on the centre of mass energy is seen to be described adequately by perturbation theory. A quantitative check of LPHD + MLLA is possible by extracting a value of

\alpha_s

from an overall fit to the scaling behaviour of

\xi^*_p

.Comment: 9 pages latex, 7 eps figures and total ps fil

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Last time updated on 30/03/2019