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Natural supersymmetry at a muon collider

Howard Baer, Vernon Barger, Jessica Bolich, Dibyashree Sengupta, Kairui Zhang

Abstract

There is great interest within the particle physics community for building a $μ^+μ^-$ collider with center-of-mass (CoM) energies ranging from $\sqrt{s}\sim$ 1-14 TeV. For Beyond-the-Standard-Model (BSM) physics, natural supersymmetry seems perhaps the most motivated, plausible extension of the Standard Model. Here, we examine what can be accomplished by a muon collider with regards to natural SUSY at various muon collider CoM energies. In natural SUSY -- especially in the guise that would emerge from the string landscape -- one expects sparticles to be spread over two orders of magnitude in mass values. A muon collider with highly variable beam energies would be most useful for targeting 2-body reaction thresholds and Higgs boson resonances.

Natural supersymmetry at a muon collider

Abstract

There is great interest within the particle physics community for building a collider with center-of-mass (CoM) energies ranging from 1-14 TeV. For Beyond-the-Standard-Model (BSM) physics, natural supersymmetry seems perhaps the most motivated, plausible extension of the Standard Model. Here, we examine what can be accomplished by a muon collider with regards to natural SUSY at various muon collider CoM energies. In natural SUSY -- especially in the guise that would emerge from the string landscape -- one expects sparticles to be spread over two orders of magnitude in mass values. A muon collider with highly variable beam energies would be most useful for targeting 2-body reaction thresholds and Higgs boson resonances.
Paper Structure (9 sections, 6 equations, 4 figures, 1 table)

This paper contains 9 sections, 6 equations, 4 figures, 1 table.

Table of Contents

  1. Introduction
  2. Status of weak scale supersymmetry
  3. Future accelerator facilities and a $\mu^+\mu^-$ collider
  4. A plausible SUSY benchmark model
  5. Natural SUSY at a muon collider
  6. Chargino and neutralino pair production
  7. Squark pair production
  8. SUSY Higgs boson production
  9. Conclusions

Figures (4)

  • Figure 1: Plot of typical natural SUSY mass spectra as expected from the string theory landscape.
  • Figure 2: Plot of a) chargino pair production rates vs. $\sqrt{s}$ and b) neutralino pair production vs. $\sqrt{s}$ at a $\mu^+\mu^-$ collider for the natural SUSY benchmark point listed in the text.
  • Figure 3: Plot of a) stop/sbottom pair production cross sections vs. $\sqrt{s}$ at a $\mu^+\mu^-$ collider for the natural SUSY benchmark point listed in the text.
  • Figure 4: Plot of Higgs boson production cross sections vs. $\sqrt{s}$ at a $\mu^+\mu^-$ collider for the natural SUSY benchmark point listed in the text.