Lecture
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20 Maggio 2024 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
General Introduction to the course: cosmological constant problem, electroweak hierarchy problem, dark matter -Introduction to cosmology: homogeneous and isotropic universes, FRW metric, Friedmann equations, energy momentum tensor for matter and radiation, solution to Friedmann equations, cosmological constant, de Sitter universe -Brief history of the Universe: BBN, CMB, structure formation -
24 Maggio 2024 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
Horizon and Flatness Problems - Inflation as a solution to the horizon and flatness problems – Classical dynamics of inflation from a single scalar field – preview of quantum effects during inflation (quantum fluctuations, power spectra, estimate of the power spectrum from dimensional analysis) – general treatment of cosmological perturbations over a homogeneous and isotropic background: symmetries of the problem and their consequences, gauge redundancy of General Relativity and gauge invariant quantities
27 Maggio 2024 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
Computation of quantum fluctuations during inflation – Minimum number of e-folds to solve horizon and flatness problem – Observables in the CMB
03 Giu 2024 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
QCD theta angle - pion mass and neutron EDM in chiral perturbation theory (with a theta angle) - strong CP problem - solutions to the strong CP problem (axion, massless up quark, P and CP solutions) - aspects of dS space (horizon and temperature)
04 Giu 2024 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - In presenza
Approximate symmetries of inflation and more on dS space - conformal invariance - introduction to effective field theories - selection rules of broken symmetries - spacetime dilations and other broken symmetries of the Standard Model
15 Lug 2024 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
Precise statement of the hierarchy problems (cosmological constant and Higgs boson mass) - symmetries and hierarchy problem - introduction to supersymmetry - Higgs and cosmological constant in supersymmetry - scale invariance and composite higgs
16 Lug 2024 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
Direct and indirect constraints on solutions to the hierarchy problem - introduction to landscapes - Abbott solution to the cosmological constant problem - relaxion explanation of the Higgs mass - introduction to 2 and 3 form fields - Brown-Teitelboim and Bousso-Polchinski solutions to the cosmological constant problem - Multiverse - Weinberg’s argument
17 Lug 2024 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
Anthropic solution to the Higgs mass - complete list of solutions to the hierarchy problem - hybrid solutions (symmetry plus landscapes) - thermodynamics in an expanding universe - equilibrium distributions from maximum entropy - limiting form for relativistic and non-relativistic particles
18 Lug 2024 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
Boltzmann equation - relic density calculations - Weakly Interacting Massive Particle (WIMP) dark matter - models of thermal dark matter beyond WIMPs
19 Lug 2024 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
More alternatives to WIMPs - general constraints on thermal dark matter - small scale structure and free streaming - ultralight dark matter production via misalignment - axion dark matter (misalignment, strings and thermal)
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