B.R. Martin e G. Shaw, Particle Physics, Fourth Edition, Wiley
S. Braibant, G. Giacomelli e M. Spurio, Particelle e interazioni fondamentali, 2^ edizione, Springer
Knowledge acquired: basic concepts of Sub-atomic Physics and of the relevant phenomenology
Competence acquired: understanding of simple physical models for Subatomic Physics and familiarity with basic phenomenology
Skills acquired (at the end of the course): use of
of basic quantum-mechanical techniques for the quantitative description of some selected and simple study cases of Sub-atomic Physics
Courses required: Mathematical Analysis II, Analytical mechanics, Physics II
Courses recommended: all the preceding courses
in the didactic organization
Total hours of the course (including the time spent in attending lectures, seminars, private study, examinations, etc...): 140
Office hours: by appointment via e-mail.
Website: on the Moodle Unifi platform
Type of Assessment
Oral examination to evaluate the real understanding of the topics discussed in the course, with particular attention to the capacity of reasoning and the use of the appropriate language.
Nuclear physics: Nuclide chart and valley of stability. Nuclear decay: Q-value and binding energy. Mass and radius of stable nuclei. Binding energy systematics. The nuclear Liquid Drop Model. The static properties of the nuclei.
Law of radioactive decay and examples. Alpha decay. Beta decay. Non conservation of parity in the beta decay.
Elementary particles: Fermions and Bosons; phenomenological description of their interactions.
The discovery of the positron.
Introduction to Feynman diagrams, virtual processes and real processes.
Range of interactions.
The Fermi constant and the coupling constant for weak interactions.
Concept of cross-section in fixed target experiments and at colliders.
The leptons and the weak interaction
The weak interactions of leptons.
Conservation of the leptonic number.
Decays of the muon and of the tau leptons.
Direct detection of electronic antineutrinos with the Reines and Cowan experiment.
Universality of weak interactions.
Quarks and hadrons
The quark composition of hadrons: mesons and baryons.
Quantum numbers conserved by strong interactions.
Strange particles, associated production and their strong and weak decays.
Discovery of new particles: the invariant mass method and the discovery of resonances in the cross section.
Parity and charge conjugation
Spectroscopic classification of hadrons.
Intrinsic parity of a particle.
Parity of a pair of particles in a state of defined angular momentum.
Parity of particles and antiparticles and positronium annihilation.
Parity of mesons and baryons in the quark model.
Parity of charged pions.
Conjugation of charge and C-parity.
Conservation of C-parity in electromagnetic and strong interactions.
Violation of C and P in weak neutrino interactions.
K0L decays in states with two and three pions.
Non-conservation of CP symmetry by weak interactions.
The quark model of hadrons
Introduction to the quark model of hadrons.
Strong isospin and hypercharge.
Classification of the possible baryonic states.
Prediction of light hadrons with the quark model: the mesons nonets, the octet and the baryon decuplet.
First evidence of color.
Weak interactions of quarks and leptons
Quarks-lepton symmetry in weak interactions.
Mixing of quarks and Cabibbo angle.
Measurements of the elements of the CKM matrix with the hadron decays and with the decays of the W boson.
The top quark.
The discovery of weak neutral currents and their theoretical interpretation.
The Z0 boson and its properties.
Physics at LEP
Two-jet events and quarks properties.
Three-jet events and gluon properties.
The R ratio and the number of colors.
Breit Wigner cross section.
Z0 physics at LEP and precision electroweak measurements.
Invisible width and number of neutrino families.