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Phenomenological extraction of a universal TMD fragmentation function from single hadron production in $e^+ e^-$ annihilations

by M. Boglione, J.O. Gonzalez-Hernandez, A. Simonelli

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Submission summary

Authors (as registered SciPost users): Mariaelena Boglione
Submission information
Preprint Link: scipost_202107_00109v1  (pdf)
Date accepted: 2022-05-06
Date submitted: 2021-07-31 23:11
Submitted by: Boglione, Mariaelena
Submitted to: SciPost Physics Proceedings
Proceedings issue: 28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects (DIS2021)
Ontological classification
Academic field: Physics
  • High-Energy Physics - Phenomenology
Approach: Phenomenological


Factorizing the cross section for single hadron production in $e^+e^-$ annihilations, differential in $z_h$, $P_T$ and thrust, is a highly non trivial task. We have devised a factorization scheme that allows us to recast the $e^+e^- \to hX$ cross section in the convolution of a calculable hard coefficient and a universal Transverse Momentum Dependent (TMD) Fragmentation Function (FF). The predictions obtained from our NLO-LL perturbative computation, together with a simple ansatz to model the non-perturbative part of the TMD, are applied to the experimental measurements of the BELLE Collaboration for the phenomenological extraction of this process independent TMD FF.

Published as SciPost Phys. Proc. 8, 139 (2022)

Reports on this Submission

Anonymous Report 1 on 2022-3-1 (Invited Report)


For those less closely familiar with the field, it would be appreciated to clarify what is meant by 'only one hadron involved' in the context of e+e- --> dijet events, which involve multiple final-state hadrons. The Journal's acceptance criteria for these proceedings are otherwise met.

  • validity: -
  • significance: -
  • originality: -
  • clarity: -
  • formatting: -
  • grammar: -

Author:  Mariaelena Boglione  on 2022-03-02  [id 2258]

(in reply to Report 1 on 2022-03-01)

For the process e+e- ---> hadron + X , BELLE has measured the cross section for two-hadron production as well as one-hadron production, namely e+e- ---> h1 + h2 + X as well as e+e- ---> h + X. For the first process usual TMD factorization theorems can be applied, while for the second process the factorization properties are still under debate. In this paper we focus on the analysis of the latter process, e+e- ---> h + X.
I think the introduction specifies this point well enough.

Anonymous on 2022-03-03  [id 2265]

(in reply to Mariaelena Boglione on 2022-03-02 [id 2258])

Thank you for the reply. Although the overall subject is clear, it is not as clear whether the discussion is always with regards to the entire h+X final state, or some subset. The requested revision, that the author clarify the meaning of the 'one hadron involved', was meant to address this: While a theorist may understand this to mean 'only one hadron meaningfully present in the calculations', an experimentalist might well take it as 'only one hadron present in the final state', which is clearly not the case in the context of a jet.

Taken as a whole, the paper does not support the second interpretation, and a sufficiently invested reader will come to this conclusion even if the misleading wording remains. Since the author believes this does not merit revision, this reviewer relents.

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