Schema della sezione

  • Minimizza Espandi

    Introduzione

    Minimizza tutto Espandi tutto

    Resources

    introduction to cosmology:
    - lecture notes by Baumann http://cosmology.amsterdam/education/cosmology/
    - book by Baumann (Baumann, D. (2022) Cosmology. Cambridge: Cambridge University Press.)
    - book by Kolb & Turner (    The Early Universe, Front. Phys. 69 (1990), 1-547 doi:10.1201/9780429492860)

    cosmological constant:
    - introductory review by Carroll https://arxiv.org/abs/astro-ph/0004075
    - Casimir effect is treated in the QFT notes by Tong https://www.damtp.cam.ac.uk/user/tong/qft.html
    - anthropic argument: see Carroll

    dark matter
    - the most comprehensive review is this book: https://www.cambridge.org/core/books/particle-dark-matter/B03C934EAB188884EFC6B02432632496. Many (most?) chapters can be found on arXiv as preprints
    - historical perspective https://arxiv.org/abs/1605.04909
    - some nice set of lectures: https://arxiv.org/abs/1603.03797 by Mariangela Lisanti, https://arxiv.org/abs/1301.0952 by Stefano Profumo
    - relic abundance: Gondolo&Gelmini (https://inspirehep.net/literature/304505)

    axions and axion DM
    - lectures by Anson Hook (https://arxiv.org/abs/1812.02669)
    - long/complete review by Marsh (https://arxiv.org/abs/1510.07633)
    - Kolb & Turner

    classical fields in cosmology
    - quantum to classical transition: Anthony Duncan, The Conceptual Framework of Quantum Field Theory, Oxford University Press
    - Robert Brandenberger, Quantum Field Theory Methods and Inflationary Universe Models, https://inspirehep.net/literature/14969

    gravitational waves
    - a good introduction is

  • Minimizza Espandi

    Esame

    Articoli proposti per il seminario di esame (aggiungerò altri riferimenti man mano)

    • Freeze-out della materia oscura studiato in dettaglio
      Gondolo & Gelmini, Nucl.Phys.B 360 (1991) 145-179

    • eccezioni al calcolo del freeze-out visto a lezione
      Griest & Seckel, Phys.Rev.D 43 (1991) 3191-3203

    • Freeze-in DM prodotta tramite scattering
      Teresi & Heeck, https://arxiv.org/abs/1706.09909

    • Accoppiamento dell'assione QCD ai mesoni con la Lagrangiana chirale
      Grilli di Cortona et al., https://arxiv.org/abs/1511.02867
      Hook, https://arxiv.org/abs/1812.02669

    • Discutere in dettaglio un tipo di ricerca di assioni

    • Axion superradiance

    • Bound su particelle leggere dato dal numero effettivo di neutrini \Delta N_{eff}

    • Cosmic strings (Hindmarsh and Kibble https://inspirehep.net/literature/380099)

    • Buchi neri primordiali (PBH): meccanismo di formazione, cenni ai limiti sulla frazione f_PBH (https://arxiv.org/pdf/1801.05235)

    • Tunnelling in QFT
    • Evidenze astrofisiche/cosmologiche dell'esistenza della materia oscura
  • Minimizza Espandi

    Lezione 1 - 03/03

    Introduction. What is cosmology. Why are cosmology and high energy physics related. Units. Planck mass. Timeline.

  • Minimizza Espandi

    Lezione 2 - 05/03

    FRLW metric. Hubble constant. Redshift. Energy density and pressure, energy-momentum tensor. Continuity equation. Equation of state. Friedmann equations and their solution.

  • Minimizza Espandi

    Lezione 3 - 10/03

    Energy density and pressure, energy-momentum tensor. Continuity equation. Equation of state. Friedmann equations and their solution. EOS for non-relativistic matter, radiation, cosmological constant and kinetic energy. Cosmic history. Critical density.

  • Minimizza Espandi

    Lezione 4 - 12/03

    Present energy budget of the Universe. Brief summary of the cosmological history. Flatness of the Universe. Age of the Universe. Stellar age problem.

  • Minimizza Espandi

    Lezione 5 - 17/03

    Cosmological constant in the Einstein equation and as a new type of fluid. Cosmological constant "problem". Potential energy of a scalar field. Fine-tuning and phase transitions. Vacuum energy in QFT.

  • Minimizza Espandi

    Lezione 6 - 19/03

    Vacuum energy and Casimir effect. Measuring the accelerated expansion with SN Ia. Anthropic principle.

  • Minimizza Espandi

    Lezione 7 - 24/03

    The Universe at thermal equibrium. Energy density. Effective number of relativistic degrees of freedom.

  • Minimizza Espandi

    Lezione 8 - 26/03

    Evidences of the existence of DM

  • Minimizza Espandi

    Lezione 9 - 31/03

    General properties of DM. Distribution at the galactic scale. Lower mass bounds: ultra-light bosons, Tremaine-Gunn bound. Electric charge. Self-interactions. DM lifetime. DM is cold: free-streaming length and matter power-spectrum.
  • Minimizza Espandi

    Lezione 10 - 02/04

    DM is cold: free-streaming length and matter power-spectrum. Thermal production of DM and freeze-out. Annihilation rate. Departure from thermal equilibrium. Hot freeze-out. Cowsik-McClelland bound on hot DM mass. Neutrino decoupling.