Effects of non-standard neutrino-electron interactions on relic neutrino decoupling
arXiv:hep-ph/0607267 · doi:10.1016/j.nuclphysb.2006.09.002
Abstract
We consider the decoupling of neutrinos in the early Universe in presence of non-standard neutral current neutrino-electron interactions (NSI). We first discuss a semi-analytical approach to solve the relevant kinetic equations and then present the results of fully numerical and momentum-dependent calculations, including flavor neutrino oscillations. We present our results in terms of both the effective number of neutrino species (N_eff) and the impact on the abundance of He-4 produced during Big Bang Nucleosynthesis. We find that, for NSI parameters within the ranges allowed by present laboratory data, non-standard neutrino-electron interactions do not essentially modify the density of relic neutrinos nor the bounds on neutrino properties from cosmological observables, such as their mass. Nonetheless, the presence of neutrino-electron NSI may enhance the entropy transfer from electron-positron pairs into neutrinos instead of photons, up to a value of N_eff=3.12. This is almost three times the correction to N_eff=3 that appears for standard weak interactions.
23 pages, 5 figures. To be published in NPB
References in corpus (4)
Cited by in corpus (33)
- Primordial Nucleosynthesis: from precision cosmology to fundamental physics
- Relic neutrino decoupling with flavour oscillations revisited
- Non-standard neutrino interactions in reactor and superbeam experiments
- Large gauge invariant non-standard neutrino interactions
- Neutrino cosmology and Planck
- Neutrino factory optimization for non-standard interactions
- Probing non-standard neutrino interactions with supernova neutrinos
- Interpretation of MINOS data in terms of non-standard neutrino interactions
- Discovery reach for non-standard interactions in a neutrino factory
- Asymmetric Matters from a Dark First-Order Phase Transition
- Revisiting cosmological bounds on radiative neutrino lifetime
- Constraining Fundamental Physics with Future CMB Experiments
- Relic Neutrino Freeze-out: Dependence on Natural Constants
- The path to metallicity: synthesis of CNO elements in standard BBN
- Asymmetric Dark Matter May Not Be Light
- The Discovery reach of violation in neutrino oscillation with non-standard interaction effects
- Detecting the radiative decay of the cosmic neutrino background with line-intensity mapping
- Neutrino oscillations and Non-Standard Interactions
- Non-standard neutrino interactions in K^{+}\toπ^{+}ν\barν and D^{+}\toπ^{+}ν\barν decays
- Cosmological radiation density with non-standard neutrino-electron interactions
- Insights into neutrino decoupling gleaned from considerations of the role of electron mass
- Global constraints on neutral-current generalized neutrino interactions
- A short survey of matter-antimatter evolution in the primordial universe
- Cosmogenic neutrino fluxes under the effect of active-sterile secret interactions
- Observable features in (ultra)high energy neutrinos due to active-sterile secret interactions
- Impact of the cosmic neutrino background on black hole superradiance
- Model for the propagation of fermions in a Bose-Einstein condensate
- Taming the pinch singularities in the two-loop neutrino self-energy in a medium
- Neutrino effective potential and damping in a fermion and scalar background in the resonance region
- Quarks to Cosmos: Particles and Plasma in Cosmological evolution
- Big Bang Nucleosynthesis as a probe of non-standard neutrino interactions and non-unitary three-neutrino mixing
- Cosmological radiation density with non-standard neutrino-electron interactions
- Improving LMA predictions with non standard interactions