Perturbative unitarity constraints on gauge portals

El Hedri, Sonia; Shepherd, William; Walker, Devin G. E.

doi:10.1016/j.dark.2017.09.006

Title: Perturbative unitarity constraints on gauge portals

Journal Article · Tue Oct 03 00:00:00 EDT 2017 · Physics of the Dark Universe

DOI:https://doi.org/10.1016/j.dark.2017.09.006· OSTI ID:1418010

El Hedri, Sonia ^[1]; Shepherd, William ^[2]; Walker, Devin G. E. ^[3]

Institut fur Physik (THEP) Johannes Gutenberg-Univ., Mainz (Germany); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Santa Cruz Institute for Particle Physics and Dept. of Physics, Santa Cruz, CA (United States)
SLAC National Accelerator Lab., Menlo Park, CA (United States)

Dark matter that was once in thermal equilibrium with the Standard Model is generally prohibited from obtaining all of its mass from the electroweak phase transition. This implies a new scale of physics and mediator particles to facilitate dark matter annihilation. In this work, we focus on dark matter that annihilates through a generic gauge boson portal. We show how partial wave unitarity places upper bounds on the dark gauge boson, dark Higgs and dark matter masses. Outside of well-defined fine-tuned regions, we find an upper bound of 9 TeV for the dark matter mass when the dark Higgs and dark gauge bosons both facilitate the dark matter annihilations. In this scenario, the upper bound on the dark Higgs and dark gauge boson masses are 10 TeV and 16 TeV, respectively. When only the dark gauge boson facilitates dark matter annihilations, we find an upper bound of 3 TeV and 6 TeV for the dark matter and dark gauge boson, respectively. Overall, using the gauge portal as a template, we describe a method to not only place upper bounds on the dark matter mass but also on the new particles with Standard Model quantum numbers. Here, we briefly discuss the reach of future accelerator, direct and indirect detection experiments for this class of models.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: ACO2-76SF00515; FG02-04ER41286; NSF PHY11-25915; NSF-PHY-0705682; PRISMA-EXC 1098

OSTI ID:: 1418010

Alternate ID(s):: OSTI ID: 1549231

Journal Information:: Physics of the Dark Universe, Vol. 18, Issue C; ISSN 2212-6864

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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