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Precision predictions for electroweak superpartner production at hadron colliders with Resummino

Benjamin Fuks, Michael Klasen, David R. Lamprea, Marcel Rothering

TL;DR

This work introduces Resummino, a computational tool that delivers precision predictions for electroweak superpartner production at hadron colliders by combining NLO QCD corrections with soft-gluon resummation. It implements threshold, transverse-momentum, and joint resummation formalisms at NLL accuracy and matches them to fixed-order results to ensure reliable predictions across kinematic regions. The package reduces theoretical uncertainties and provides detailed $d\sigma/dp_T$, $d\sigma/dM$, and total cross sections for slepton and gaugino production, demonstrated on a typical LHC SUSY benchmark. This enables more robust interpretation of experimental searches and improved prospects for constraining or measuring supersymmetric parameters.

Abstract

We describe the Resummino package, a C++ and Fortran program dedicated to precision calculations in the framework of gaugino and slepton pair production at hadron colliders. This code allows to calculate transverse-momentum and invariant-mass distributions as well as total cross sections by combining the next-to-leading order predictions obtained by means of perturbative QCD with the resummation of the large logarithmic contributions arising in the small transverse-momentum region and close to the production threshold. The results computed in this way benefit from reduced theoretical uncertainties, compared to a pure next-to-leading order approach as currently employed in the experimental analyses searching for sleptons and gauginos at hadron colliders. This is illustrated by using of Resummino in the context of a typical supersymmetric benchmark point dedicated to superpartner searches at the Large Hadron Collider.

Precision predictions for electroweak superpartner production at hadron colliders with Resummino

TL;DR

This work introduces Resummino, a computational tool that delivers precision predictions for electroweak superpartner production at hadron colliders by combining NLO QCD corrections with soft-gluon resummation. It implements threshold, transverse-momentum, and joint resummation formalisms at NLL accuracy and matches them to fixed-order results to ensure reliable predictions across kinematic regions. The package reduces theoretical uncertainties and provides detailed , , and total cross sections for slepton and gaugino production, demonstrated on a typical LHC SUSY benchmark. This enables more robust interpretation of experimental searches and improved prospects for constraining or measuring supersymmetric parameters.

Abstract

We describe the Resummino package, a C++ and Fortran program dedicated to precision calculations in the framework of gaugino and slepton pair production at hadron colliders. This code allows to calculate transverse-momentum and invariant-mass distributions as well as total cross sections by combining the next-to-leading order predictions obtained by means of perturbative QCD with the resummation of the large logarithmic contributions arising in the small transverse-momentum region and close to the production threshold. The results computed in this way benefit from reduced theoretical uncertainties, compared to a pure next-to-leading order approach as currently employed in the experimental analyses searching for sleptons and gauginos at hadron colliders. This is illustrated by using of Resummino in the context of a typical supersymmetric benchmark point dedicated to superpartner searches at the Large Hadron Collider.

Paper Structure

This paper contains 12 sections, 35 equations, 1 figure, 1 table.

Table of Contents

  1. Introduction
  2. Resummation formalisms
  3. Main features
  4. Threshold resummation at the next-to-leading logarithmic accuracy
  5. Transverse-momentum resummation at the next-to-leading logarithmic accuracy
  6. Joint resummation at the next-to-leading logarithmic accuracy
  7. Installing and running Resummino
  8. Requirements and technical details
  9. Installation
  10. Running the code
  11. Illustrative examples
  12. Summary

Figures (1)

  • Figure 1: Transverse-momentum distributions for $\tilde{\chi}_2^0\tilde{\chi}_1^+$ and $\tilde{\tau}_1^+\tilde{\tau}^-_1$ production at the LHC, running at a center-of-mass energy of 8 TeV, at order ${\@fontswitch\mathcal{O}}(\alpha_s)$ (dashed) and after matching the results with transverse-momentum (dotted) and joint (plain) resummation.