Neutrino transport in coherent quasiparticle approximation

Ilmavirta, Joonas

by Joonas Ilmavirta

Abstract:

We introduce the coherent quasiparticle approximation (cQPA), a model in thermal quantum field theory which describes various effects of temporally varying thermal medium on particle propagation. We present the cQPA Feynman rules and develop related calculational tools. Using these methods we calculate neutrino self energies in the Standard Model and derive an equation of motion for neutrino propagation in a very general framework. Some immediate implications of this equation are discussed. (More detailed abstract in the PDF file.)

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Reference:

Neutrino transport in coherent quasiparticle approximation (Joonas Ilmavirta), Master's thesis, University of Jyväskylä, Department of Physics, 2012. (advisor: Kimmo Kainulainen) [show abstract] [hide abstract] We introduce the coherent quasiparticle approximation (cQPA), a model in thermal quantum field theory which describes various effects of temporally varying thermal medium on particle propagation. We present the cQPA Feynman rules and develop related calculational tools. Using these methods we calculate neutrino self energies in the Standard Model and derive an equation of motion for neutrino propagation in a very general framework. Some immediate implications of this equation are discussed. (More detailed abstract in the PDF file.) [eprint]

Bibtex Entry:

@mastersthesis{msc,
    author    = "Joonas Ilmavirta",
    title     = "Neutrino transport in coherent quasiparticle approximation",
    school    = "University of Jyv\"askyl\"a, Department of Physics",
    year      = "2012",
    month     = may,
    url = {http://users.jyu.fi/~jojapeil/thesis/neutrino_transport_in_cqpa_070512.pdf},
    note = {advisor: Kimmo Kainulainen},
    eprint = {http://urn.fi/URN:NBN:fi:jyu-201211012839},
    abstract = {We introduce the coherent quasiparticle approximation (cQPA), a model in thermal quantum field theory which describes various effects of temporally varying thermal medium on particle propagation. We present the cQPA Feynman rules and develop related calculational tools. Using these methods we calculate neutrino self energies in the Standard Model and derive an equation of motion for neutrino propagation in a very general framework. Some immediate implications of this equation are discussed. (More detailed abstract in the PDF file.)}
}