Lecture
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15 Mar 2023 (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 -Horizon and Flatness Problems
16 Mar 2023 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
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
17 Mar 2023 (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
21 Mar 2023 (2h 00m)
Luigi Rolandi - Corso (attività didattica) - In presenza
Photon gas in equilibrium with matter. Brightness. Plank spectrum. Discovery of CMB. Results of FIRAS: CMB is planckian. Measurement of Temperature antenna from spectral energy distribution. Uniformity of CMB and dipole term at 0.1 percent level. Decoupling. Why CMB measures the last scattering surface, The Horizon problem. The magic of the Thompson scattering and polarisation.
22 Mar 2023 (2h 00m)
Luigi Rolandi - Corso (attività didattica) - In presenza
The Planck mission. What exactly Planck measures. Instrumental corrections. Foreground corrections. Meaning of the power spectrum. Cosmological parameters as derived by the Plank data. Detailed discussion of the the Planck mission: instruments, building, launching, focal plane, data transmission, operation. Data acquisition. Corrections. Analysis. Anomalies.
23 Mar 2023 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
Introduction to effective field theories – Dimensional analysis and selection rules of broken symmetries of the SM - Precise statement of the hierarchy problems (cosmological constant and Higgs boson mass) - Symmetries and hierarchy problems – Introduction to supersymmetry – Higgs and cosmological constant in supersymmetry
24 Mar 2023 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
Direct and indirect constraints on solutions to the hierarchy problems – Introduction to landscapes - Abbott solution to the cosmological constant (CC) problem – Relaxion explanation of the Higgs mass
28 Mar 2023 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
More on the relaxion - introduction to 2- and 3-form fields – Brown-Teitelboim solution to the CC problem - Bousso-Polchinski solution to the cosmological constant (CC) problem – Multiverse – Weinberg’s argument – anthropic solutions to the CC problem
29 Mar 2023 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
Anthropic solution to the Higgs mass hierarchy – Dynamical selection mechanisms for the Higgs mass – Scale invariance for Higgs and cosmological constant – Symmetry and Landscapes, general philosophy and split supersymmetry.
30 Mar 2023 (2h 00m)
Luigi Rolandi - Corso (attività didattica) - In presenza
Motivations for Supersymmetry (Susy):hierarchy, coupling unification. Consequences of susj breaking. The LHC energy frontier , Parton distribution functions, typical susj signatures. LHC experimental conditions,Trigger and data acquisitions.
31 Mar 2023 (2h 00m)
Luigi Rolandi - Corso (attività didattica) - In presenza
Physics objects, including trigger: muons, electrons, taus, jets, MET, HT. How to design a SUSJ search, concept of control region and reduction of uncertainty on background rates. Statistical tools, how to put exclusion on a cross section , CL-S+B. The brasilian flag exclusion plot. How to read an exclusion plot.
04 Apr 2023 (2h 00m)
Luigi Rolandi - Corso (attività didattica) - In presenza
Simplified models, Natural Susj. Motivations for RT parity conservation . Search for a pair of neutralinos triggered by and ISR jet. Event topology JET+MET. Control regions with leptons. Interpretations of the result. Gluino/Squark pair production: jets + MET topology . Special v variables like alpha_T, MT2, Razor. Special case of stop production, almost degenerate with top, excluded with spin correlations. Electroweak SUSY and compressed scenarios.
05 Apr 2023 (2h 00m)
Luigi Rolandi - Corso (attività didattica) - In presenza
R-Parity-violation SUSY. Searches for resonance decaying to two jets. Also with scouting. Search for rpair produced RPV squarks each decaying to two jets. Search for long lived particles: R-Hadrons search with dE/dx. Stopped particles ink the calorimeters. Disappearing tracks. Displaced Jets. SHIP, Mathusla, Codex, Faser.
06 Apr 2023 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
Thermodynamics in an expanding universe – equilibrium distributions from maximum entropy – limiting forms for relativistic and non-relativistic particles – Boltzmann Equation
07 Apr 2023 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
Relic density calculations – Weakly Interactive Massive Particle (WIMP) dark matter - models of thermal dark matter production beyond WIMPs
26 Apr 2023 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
General constraints on thermal dark matter: Neff bounds, small scale structure, matter radiation equality and CMB peaks – ultralight dark matter production via the misalignment mechanism
27 Apr 2023 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
QCD theta angle – calculation in chiral perturbation theory of pion masses and neutron EDM with a theta angle – strong CP problem – solutions (mu=0, P, CP, axion) – axion potential – axion cosmology – axion as dark matter
28 Apr 2023 (2h 00m)
Raffaele Tito D'agnolo - Corso (attività didattica) - A distanza
Approximate symmetries of inflation - conformal invariance - symmetries of inflationary correlators - In-In formalism for cosmological correlators – Imprints on non-gaussianities of massive particles during inflation (cosmological collider physics)
09 Maggio 2023 (2h 00m)
Luigi Rolandi - Corso (attività didattica) - A distanza
Dark Matters searches at LHC Search for WIMPS in the galactic halo. Searches at LHC. Simplified models with mediator: scalar, pseudo scalar, vector, axial vector cases. Interpretation of various analyses: Monojet. Di-jet resonance, H plus MET, W/Z/plus MET, ttbar+MET, Combining the results of all analyses in a big picture. Comparing direct searches with LHC.
11 Maggio 2023 (2h 00m)
Luigi Rolandi - Corso (attività didattica) - In presenza
Feebly interacting particles in accelerators, Light Dark matter. Paradigma with mediators. Vector portal, discussion on the parameter space and type of detection: visible final state, rescattering of DM, missing momentum , missing mass. Dark photon in : prompt resonances, displaced vertices, Meson decays: Belle, LHCB, Mathusla, SHIP , Faser, NA62, NA64, LDMX. Millicharged particles.
12 Maggio 2023 (2h 00m)
Luigi Rolandi - Corso (attività didattica) - In presenza
Scalar Portal: limits from meson decays and from Higgs decays. Fermion portal: neutrino mixing . Limits from weak decays. Axion and ALPS.
15 Maggio 2023 (2h 00m)
Luigi Rolandi - Corso (attività didattica) - In presenza
Photon dominance Light Shining through the wall, Polarisation experiments, Helioscopes, Haloscopes, Pick-up coils, Accelerator based ALPS searches. ALP fermion coupling, ALP gluon coupling. Search for ALPS at LHC.
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