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Title: Transverse parton momenta in single inclusive hadron production in e+ e- annihilation processes

Here, we study the transverse momentum distributions of single inclusive hadron production in e+e- annihilation processes. Although the only available experimental data are scarce and quite old, we find that the fundamental features of transverse momentum dependent (TMD) evolution, historically addressed in Drell–Yan processes and, more recently, in Semi-inclusive deep inelastic scattering processes, are visible in e+e- annihilations as well. Interesting effects related to its non-perturbative regime can be observed. We test two different parameterizations for the p $$\perp$$ dependence of the cross section: the usual Gaussian distribution and a power-law model. We find the latter to be more appropriate in describing this particular set of experimental data, over a relatively large range of p $$\perp$$ values. We use this model to map some of the features of the data within the framework of TMD evolution, and discuss the caveats of this and other possible interpretations, related to the one-dimensional nature of the available experimental data.
 [1] ;  [2] ;  [3]
  1. Univ. di Torino, Torino (Italy); INFN-Sezione Torino, Torino (Italy)
  2. Univ. di Torino, Torino (Italy); INFN-Sezione Torino, Torino (Italy); Old Dominion Univ., Norfolk, VA (United States)
  3. Yazd Univ., Yazd (Iran)
Publication Date:
Grant/Contract Number:
FG02-97ER41028; AC05-06OR23177
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 772; Journal Issue: C; Journal ID: ISSN 0370-2693
Research Org:
Old Dominion University Research Foundation, Norfolk, VA (United States)
Sponsoring Org:
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Non-perturbative QCD; Transverse momentum dependent fragmentation functions; TMD evolution
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1422205