1 / 12

CMB constraints on Lorentz violation in the neutrino sector

CMB constraints on Lorentz violation in the neutrino sector . Zong-Kuan Guo ( ITP, CAS). Weihai August 13, 2012. outline. motivations deformed dispersion relation Boltzmann equation cosmological constraints remarks. This talk is based on

lita
Download Presentation

CMB constraints on Lorentz violation in the neutrino sector

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CMB constraints on Lorentz violation in the neutrino sector Zong-KuanGuo (ITP, CAS) Weihai August 13, 2012

  2. outline • motivations • deformed dispersion relation • Boltzmann equation • cosmological constraints • remarks This talk is based on ZKG, Q-G Huang, R-G Cai, Y-Z Zhang, PRD in press [arXiv:1206.5588]

  3. motivations • neutrino oscillations • neutrinos influence the CMB (massive or massless) • neutrinos influence the LSS

  4. the deformed dispersion relation • the scalar perturbations of the FLRW metric in the synchronous gauge

  5. the action in the first-order formalism • the Lagrangianin the synchronous gauge

  6. the number density, energy density and pressure • the perturbed energy density, pressure, energy flux and shear stress

  7. the Boltzmann equation

  8. the initial conditions

  9. cosmological constraints

  10. remarks • Compared to particle physics experiments, cosmological observations yield much weaker constraints on the Lorentz-violation parameter in the neutrino sector. • We neglects neutrino oscillations, possible species dependence, anisotropies associated with violations of rotation symmetry, and CPT violation.

  11. Thanks!

More Related