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Oscillations in Modified Combinants of Hadronic Multiplicity Distributions

by P. Agarwal, H. W. Ang, Z. Ong, A. H. Chan, C. H. Oh

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Submission summary

Authors (as registered SciPost users): Pulkit Agarwal
Submission information
Preprint Link:  (pdf)
Date accepted: 2022-02-28
Date submitted: 2021-10-26 07:22
Submitted by: Agarwal, Pulkit
Submitted to: SciPost Physics Proceedings
Proceedings issue: 50th International Symposium on Multiparticle Dynamics (ISMD2021)
Ontological classification
Academic field: Physics
  • High-Energy Physics - Phenomenology
Approaches: Computational, Phenomenological


Oscillations in modified combinants ($C_j$s) have been of interest to multiparticle production mechanisms since the 1990s. Recently, there has been a discussion on how these oscillations can be reproduced by compounding a binomial distribution with a negative binomial distribution. In this work, we explore a stochastic branching model based on a simple interaction term $\lambda\overline{\psi}\phi\psi$ for partons and propose a hadronization scheme to arrive at the final multiplicity distribution. We study the effects that compounding our model with a binomial distribution has on $C_j$s and explore its physical implications. We find that there is a significant difference in the oscillations in $C_j$s between high energy $pp$ and $p\bar{p}$ scattering that our model can reproduce.

Published as SciPost Phys. Proc. 10, 004 (2022)

Reports on this Submission

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

  • Cite as: Anonymous, Report on arXiv:2110.12409v1, delivered 2022-01-03, doi: 10.21468/SciPost.Report.4127


1. The paper is well-written
2. The proposed model is novel
3. The proposed model gives a good qualitative description of Oscillations in Modified Combinants of hadronic multiplicity distributions.


1. The paper does not relate the findings of the model to state-of-the-art models for hadron production. For a full paper this may be necessary, but for a conference proceedings the current treatment is fine.


This conference proceedings presents a model based on stochastic branching to explain the difference in oscillations in modified combinants of hadronic multiplicity distributions, for pp and p\bar{p} collisions respectively. By simple means, the authors demonstrate a good qualitative description of data.

For a full paper, I would have suggested the authors to at least:
(1) make a direct comparison between model/data (fig. 1 & 4) to allow more detailed comparison.
(2) compare to state-of-the-art model, such as the Herwig cluster model, which I suspect have a similar behavior, as per the authors' explanation of general features of cluster production of multiplicity. And in case it does not, such a comparison could shed light on some of the more poorly understood features of the colour structure of beam remnants (cf. the authors' sec. 4.2)

For a conference proceedings these remarks are, however, beyond the scope, and I simply leave them here for general inspiration for the authors.

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  • validity: top
  • significance: high
  • originality: good
  • clarity: top
  • formatting: excellent
  • grammar: excellent

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