Upper limit on the scale of new physics phenomena from rising cross sections in high multiplicity Higgs and vector boson events

Jaeckel, Joerg; Khoze, Valentin V.

Abstract

In very high energy scattering events, production of multiple Higgs and electroweak gauge bosons becomes possible. Indeed the perturbative cross section for these processes grows with increasing energy, eventually violating perturbative unitarity. In addition to perturbative unitarity we also examine constraints on high multiplicity processes arising from experimentally measured quantities. These include the shape of the Z-peak and upper limits on scattering cross sections of cosmic rays. We find that the rate of high multiplicity electroweak processes will exceed these upper limits at energies not significantly above what can be currently tested experimentally. This leaves two options: (1) The electroweak sector becomes truly nonperturbative in this regime or (2) additional physics beyond the standard model is needed. In both cases novel physics phenomena must set in before these energies are reached. Based on the measured Higgs mass we estimate the critical energy to be in the range of 103  TeV but we also point out that it can potentially be significantly less than that.

Citation

Jaeckel, J., & Khoze, V. V. (2015). Upper limit on the scale of new physics phenomena from rising cross sections in high multiplicity Higgs and vector boson events. Physical Review D, 91, Article 093007. https://doi.org/10.1103/physrevd.91.093007

• Journal Article Type: Article
• Publication Date: May 21, 2015
• Deposit Date: Apr 23, 2015
• Publicly Available Date: Jun 15, 2015
• Journal: Physical Review D - Particles, Fields, Gravitation, and Cosmology
• Print ISSN: 1550-7998
• Electronic ISSN: 1550-2368
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 91
• Article Number: 093007
• DOI: https://doi.org/10.1103/physrevd.91.093007
• Public URL: https://durham-repository.worktribe.com/output/1430745
• Related Public URLs: http://arxiv.org/abs/1411.5633