Introductory Experimental High Energy Physics

23 Gen 2023 (2h 00m)

Luigi Rolandi - Corso (attività didattica) - In presenza

Rutherford experiment. Interpretation with occupancy. Definition of cross section and Luminosity. Collider Luminosity. Interaction length. Synchrotrons. Motion of a particle bunch. beta function. Tune. Limitations: Beam-beam effects. Electron cloud. Synchrotron radiation. Superconducting Magnets. Acceleration with cavities. Dielectric Laser acceleration.Plasma wake field acceleration. Muon colliders.

26 Gen 2023 (2h 00m)

Luigi Rolandi - Corso (attività didattica) - In presenza

The four interactions. Basics on Feynman diagrams. QED diagrams, tree level and NLO. Electron g-2, measurement. Test of QED. Basic diagrams of Weak interaction. Muon lifetime and fermi constant. Introduction to LEP. Energy Calibration of the LEP beams. Measurement of the Z lineshape at LEP. Measurements of the FB asymmetries.Fitting function and pseudo-observables. 30 Gennaio Electroweak 2

30 Gen 2023 (2h 00m)

Luigi Rolandi - Corso (attività didattica) - In presenza

SLC and the collisions with polarised electron beams. Measurement of the polarisation, measurement of the LR asymmetry. WW production at LEP2 and measurement of the W mass. W mass at the Tevatron . Higgs searches at LEP.Plots of the Higgs discovery. Global Electroweak fit. 2 Febbraio La struttura del protone

02 Feb 2023 (2h 00m)

Luigi Rolandi - Corso (attività didattica) - In presenza

Elastic scattering and proton form factors. Experiments of Hofstadter . Cross section at “large” momentum transfer shows deviations. The momentum transfer is the correct variables for describing the scattering cross section. Proton and neutrons are not pointlike and their form factors are the same.Inelastic e-p scattering, W1 and W2 form factors. Comparing muon and proton x-sections . Bjorken (scaling) intuition of form factors function of x only. SLAC experiments measuring proton and neutron form factors. Interpretation in the quark parton model.Failure of model, Average momentum carried by quarks. Gluons are inside the proton. Measurement at high energy at Hera and scaling violation. DGLAP and PDF evolution from Hera to LHC

06 Feb 2023 (2h 00m)

Luigi Rolandi - Corso (attività didattica) - In presenza

Hadron hadron interaction and factorisation theorem. Phenomenology of pp collisions. Pseudorapidity and invariant relativistic phase space. Description of CMS and LHCb detectors. Detection of muons in CMS, Muons produced in LHC collisions, techniques for separating muons of various origin, isolation, promt muons. Tag and probe method for efficiencies measurements. Methods for measuring fakes in muon identification.

09 Feb 2023 (2h 00m)

Luigi Rolandi - Corso (attività didattica) - In presenza

Uncertainties in the measurement of the muon momentum. Calibration of the scale and resolution of the CMS tracker. Local calibration of the tracker with the triplet method.

16 Feb 2023 (2h 00m)

Luigi Rolandi - Corso (attività didattica) - In presenza

experimental technique for di-jet resonance hunting. Fat jets , selection in rapidity, golden events, signal shape , importance of the tail of the PDFs. Scouting and limit on the coupling. Higgs searches at LHC, Higgs production and decays as a function of mH. Criteria for the search and importance of mass resolution. Golden channel, electron and muon id. Gamma-Gamma, background reduction. Vertex selection. Background shape. Search for the Higgs to mumu.

17 Feb 2023 (2h 00m)

Luigi Rolandi - Corso (attività didattica) - A distanza

Hadron hadron interaction and factorisation theorem. Phenomenology of pp collisions. Pseudorapidity and invariant relativistic phase space. Description of CMS and LHCb detectors. Detection of muons in CMS, Muons produced in LHC collisions, techniques for separating muons of various origin, isolation, promt muons. Tag and probe method for efficiencies measurements. Methods for measuring fakes in muon identification.

20 Feb 2023 (2h 00m)

Luigi Rolandi - Corso (attività didattica) - In presenza

First (anti-)neutrino measurement, neutrino sources, neutrino masses, Dirac equation, chirality and helicity, majorana and dirac neutrinos see-saw mechanism. Indirect measurements of the neutrino mass. Neutrino oscillations. Atmospheric neutrinos. Superkamiokanda. Solar neutrinos: homes take, gallium , electron neutrino deficit, SNO and solution of the solar neutrino puzzle.Kamland and Daya Bay reactor experiments.Global picture with three neutrinos, PMNS matrix. Dune- Juno. Future neutrino beams.

23 Feb 2023 (2h 00m)

Luigi Rolandi - Corso (attività didattica) - In presenza

Neutrinoless double beta decay(bb0nu). Introduction to neutrinos. Normal and inverted hierarchy. Dirac and Maiorana mass mechanisms. Maiorana neutrinos and barion excess. Mechanism for double beta and helicity flip. Relation between the lightest neutrino mass , effective mass and bb0nu. Ideal bb0nu experiment Importance of resolution, radiopurity. Quest for a zero background experiment. GERDA. CUORE. Kamland. Xenon TPC, Next, Bold.