Zero-range effective field theory for resonant wino dark matter. Part III. Annihilation effects

A bstract Near a critical value of the wino mass where there is a zero-energy S-wave resonance at the neutral-wino-pair threshold, low-energy winos can be described by a zero-range effective field theory (ZREFT) in which the winos interact nonperturbatively through a contact interaction and through...

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Published inThe journal of high energy physics Vol. 2018; no. 5; pp. 1 - 52
Main Authors Braaten, Eric, Johnson, Evan, Zhang, Hong
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2018
Springer Nature B.V
Springer Berlin
SpringerOpen
Subjects
Bosons
Classical and Quantum Gravitation
Dark matter
Elementary Particles
Energy
Field theory
High energy physics
Interaction parameters
Photons
Physics
Physics and Astronomy
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
Scattering
Schrodinger equation
String Theory
Supersymmetry Phenomenology
Supersymmetry Phenomenology
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Summary:A bstract Near a critical value of the wino mass where there is a zero-energy S-wave resonance at the neutral-wino-pair threshold, low-energy winos can be described by a zero-range effective field theory (ZREFT) in which the winos interact nonperturbatively through a contact interaction and through Coulomb interactions. The effects of wino-pair annihilation into electroweak gauge bosons are taken into account through the analytic continuation of the real parameters for the contact interaction to complex values. The parameters of ZREFT can be determined by matching wino-wino scattering amplitudes calculated by solving the Schrödinger equation for winos interacting through a real potential due to the exchange of electroweak gauge bosons and an imaginary potential due to wino-pair annihilation into electroweak gauge bosons. ZREFT at leading order gives an accurate analytic description of low-energy wino-wino scattering, inclusive wino-pair annihilation, and a wino-pair bound state. ZREFT can also be applied to partial annihilation rates, such as the Sommerfeld enhancement of the annihilation rate of wino pairs into monochromatic photons.
Bibliography:USDOE Office of Science (SC), High Energy Physics (HEP)
SC0011726
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP05(2018)062