Transverse parton momenta in single inclusive hadron production in e+e− annihilation processes

Journal Article · Fri Sep 01 00:00:00 EDT 2017 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2017.06.034· OSTI ID:1364662

Boglione, M. ; Gonzalez-Hernandez, J. O.; Taghavi, R.

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.

• Research Organization: Old Dominion University Research Foundation, Norfolk, VA (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC05-06OR23177; FG02-97ER41028
• OSTI ID: 1364662
• Alternate ID(s): OSTI ID: 1422205
• Journal Information: Physics Letters B, Journal Name: Physics Letters B Vol. 772 Journal Issue: C; ISSN 0370-2693
• Publisher: Elsevier
• Country of Publication: Netherlands
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Non-perturbative QCD
Transverse momentum dependent fragmentation functions
TMD evolution