Radiative corrections to co-annihilation processes

Abstract

In co-annihilation scenarios, the weakly interacting dark matter particle (WIMP) is close in mass to another particle that can decay into the WIMP. As a result, both particles freeze out at roughly the same time in the early universe, and both contribute to the effective dark matter annihilation cross-section. Since the heavier particle does not need to be weakly interacting, the co-annihilation processes are in general subject to sizeable radiative corrections. Here this is analyzed for the example of neutralino-stop co-annihilation in supersymmetry. The leading QCD corrections are calculated and it is found that they have a large effect on the effective annihilation cross-section, reaching more than 50% in some regions of parameter space.

8pp; version appearing in Phys. Lett. B

References in corpus (23)

• Generating Feynman Diagrams and Amplitudes with FeynArts 3
• The 3D power spectrum of galaxies from the SDSS
• DarkSUSY: Computing Supersymmetric Dark Matter Properties Numerically
• Potential NRQCD: an effective theory for heavy quarkonium
• Non-perturbative Effect on Thermal Relic Abundance of Dark Matter
• The static potential in QCD to two loops
• Light Scalar Top Quarks and Supersymmetric Dark Matter
• Renormalization group scaling in nonrelativistic QCD
• Calculations of Neutralino-Stop Coannihilation in the CMSSM
• Dark Matter, Light Stops and Electroweak Baryogenesis
• The Supersymmetric Origin of Matter
• Heavy Quark Pair Production near Threshold with Potential Non-Relativistic QCD
• QCD Corrections to Scalar Quark Decays
• The QCD heavy-quark potential to order v^2: one loop matching conditions
• Ultrasoft Renormalization in Non-Relativistic QCD
• Yukawa-coupling corrections to scalar quark decays
• The sfermion mass spectrum of the MSSM at the one-loop level
• Neutralino Annihilation to Gluons
• SUSY--QCD corrections to scalar quark pair production in $e^{+}{e}^{-}$ annihilation
• Analyzing the Scalar Top Co-Annihilation Region at the ILC
• Renormalization Group Analysis in NRQCD for Colored Scalars
• Neutralino annihilation to q qbar g
• Neutralino annihilation beyond leading order

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• Top-philic dark matter within and beyond the WIMP paradigm
• Relic density at one-loop with gauge boson pair production
• Neutralino-stop co-annihilation into electroweak gauge and Higgs bosons at one loop
• The Sommerfeld enhancement for scalar particles and application to sfermion co-annihilation regions
• SUSY-QCD Corrections to Dark Matter Annihilation in the Higgs Funnel
• Dark Matter Sommerfeld-enhanced annihilation and Bound-state decay at finite temperature
• One-loop corrections to neutralino-stop coannihilation revisited
• SUSY-QCD corrections to stop annihilation into electroweak final states including Coulomb enhancement effects
• Dark Matter bound-state formation at higher order: a non-equilibrium quantum field theory approach
• One-loop corrections, uncertainties and approximations in neutralino annihilations: Examples
• Rapid bound-state formation of Dark Matter in the Early Universe
• Dark matter scenarios in a constrained model with Dirac gauginos
• One-loop corrections to gaugino (co-)annihilation into quarks in the MSSM
• Radiative Corrections to the Neutralino Dark Matter Relic Density - an Effective Coupling Approach
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• Potentially Large One-loop Corrections to WIMP Annihilation
• On low-energy predictions of unification models inspired by F-theory
• Squark-pair annihilation into quarks at next-to-leading order
• Stop Co-Annihilation in the Minimal Supersymmetric Standard Model Revisited
• SUSY-QCD corrected and Sommerfeld enhanced stau annihilation into heavy quarks with scheme and scale uncertainties
• Relic density calculations beyond tree-level, exact calculations versus effective couplings: the ZZ final state
• Precision predictions for dark matter with DM@NLO in the MSSM
• Radiative corrections to stop-antistop annihilation into gluons and light quarks
• Impact of SUSY-QCD corrections on neutralino-stop co-annihilation and the neutralino relic density
• Effective Approaches in and Beyond the MSSM : applications to Higgs Physics and Dark Matter observables