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Title: Zero-range effective field theory for resonant wino dark matter. Part I. Framework

Journal Article · · Journal of High Energy Physics (Online)

The most dramatic “Sommerfeld enhancements” of neutral-wino-pair annihilation occur when the wino mass is near a critical value where there is a zero-energy S-wave resonance at the neutral-wino-pair threshold. Near such a critical mass, low-energy winos can be described by a zero-range effective field theory in which the winos interact nonperturbatively through a contact interaction. The effective field theory is controlled by a renormalization-group fixed point at which the neutral and charged winos are degenerate in mass and their scattering length is infinite. The parameters of the zero-range effective field theory can be determined by matching wino-wino scattering amplitudes calculated by solving the Schrödinger equation for winos interacting through a potential due to the exchange of weak gauge bosons. If the wino mass is larger than the critical value, the resonance is a wino-pair bound state. As a result, the power of the zero-range effective field theory is illustrated by calculating the rate for formation of the bound state in the collision of two neutral winos through the emission of two soft photons.

Research Organization:
Ohio State Univ., Columbus (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0011726
OSTI ID:
1499187
Journal Information:
Journal of High Energy Physics (Online), Vol. 2017, Issue 11; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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Cited By (11)

Rapid Bound State Formation of Dark Matter in the Early Universe journal April 2020
Dark matter Sommerfeld-enhanced annihilation and bound-state decay at finite temperature journal December 2018
Tev-scale thermal WIMPs: Unitarity and its consequences journal August 2019
Cosmological production of dark nuclei journal April 2019
Zero-range effective field theory for resonant wino dark matter. Part II. Coulomb resummation journal February 2018
Rapid bound-state formation of Dark Matter in the Early Universe text January 2020
Dark matter Sommerfeld-enhanced annihilation and bound-state decay at finite temperature text January 2018
Dark Matter Sommerfeld-enhanced annihilation and Bound-state decay at finite temperature text January 2018
Dark Matter Sommerfeld-enhanced annihilation and Bound-state decay at finite temperature text January 2018
TeV-Scale Thermal WIMPs: Unitarity and its Consequences text January 2019
Rapid bound-state formation of Dark Matter in the Early Universe text January 2019

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