NUCLEAR AND PARTICLE PHYSICS
Module NUCLEAR AND PARTICLE PHYSICS I

Academic Year 2026/2027 - Teacher: IVANO LOMBARDO

Expected Learning Outcomes

Upon completion of the course, the student is expected to have a coherent view of subatomic phenomena and to be able to tackle a range of problems concerning the realm of nuclei and elementary particles.

Course Structure


Required Prerequisites

Solid knowledge of General Physics I and II, Quantum Mechanics, Mathematical Methods in Physics, and General and Modern Physics Laboratory.

Detailed Course Content

1. Review of Special Relativity and Symmetries

Lorentz transformations; matrix formulation; relativistic effects on particle lifetimes; four-vectors; covariant and contravariant forms; metric tensor; light cone; general Lorentz transformations; Lorentz boosts; rapidity and pseudorapidity; relativistic velocity addition; four-momentum; mass-shell condition; invariant mass of a system; particle decays; elastic and inelastic collisions; nuclear and particle reactions; laboratory and center-of-momentum reference frames; natural units; Mandelstam variables and their physical interpretation; crossing symmetry; particle helicity and chirality; discrete symmetries: C, P, and T; G-parity.

2. Experimental Tools of Subatomic Physics

Operational definition of cross section; angular distributions; excitation functions; angle-integrated cross sections; energy-integrated cross sections; luminosity and integrated luminosity; general behavior of nuclear and subnuclear reaction cross sections; Fermi’s Golden Rule for subatomic reactions and decays; phase space; resonance phenomena; resonance strength; studies of subatomic particle states in formation and production processes; three-body decays and Dalitz plots; Feynman diagrams; transition amplitudes; Standard Model interaction vertices.

3. Selected Topics in Nuclear Physics

Properties of the nuclear force; the two-nucleon system; the lightest nuclei and many-body force effects; advanced topics in alpha decay; review of beta decay; determination of the Fermi constant from superallowed beta decays; Sargent’s rule; electron capture; gamma decay; selection rules; Weisskopf estimates and reduced transition probabilities; recoil effects in gamma decay; the Szilard-Chalmers effect; the Mössbauer effect and its applications; compound nucleus reactions; partial and reduced widths; Wigner limits; angular distributions and light-nucleus spectroscopy; detailed balance principle; direct reactions; knockout reactions; review of the nuclear shell model; limitations of independent-particle models; cluster models; the molecular orbital method.

4. Electron-Nucleus and Electron-Proton Scattering

Rutherford and Mott scattering cross sections; electric form factor; four-momentum transfer; magnetic form factor; Rosenbluth cross section; proton charge distribution; inelastic electron-proton scattering; the variables ν, x (Bjorken x), and y; results of deep inelastic scattering and the parton model; structure functions; Bjorken scaling; the Callan-Gross relation; valence and sea quarks; considerations on parton distribution functions.

5. The Quark World and the Classification of Subnuclear Particles

Nucleon structure; quark families; quark electric charges; quark momentum distributions; properties of bare quarks; hadron phenomenology: baryons and mesons; the existence of color charge; gluons; color neutrality in hadrons; the strong coupling constant; asymptotic freedom and confinement; violation of scale invariance in structure functions; physics at electron-positron colliders; Bhabha and Møller scattering; lepton-pair production; discovery of the tau lepton; muon-production cross sections; resonance phenomena in e⁺e⁻ collisions; the ρ and ω resonances; the φ meson and Zweig’s rule; discovery of the J/ψ particle: the Richter and Ting experiments; the Υ resonances; studies of the Z⁰ resonance at LEP; non-resonant hadron production; the R ratio and the number of colors; double- and triple-jet hadron emission; group theory and the classification of hadrons.

6. Isospin in Nuclei and Particles

Isospin symmetry in nucleons and nuclei; isobaric analogue states; isospin multiplets; isospin considerations and nuclear reaction cross sections; isospin channels in transfer reactions; the Thomas-Ehrman shift; isospin in particle physics; hypercharge; branching-ratio calculations in particle production; isospin channels in two-particle systems.

Textbook Information

For Nuclear Physics topics:

1. S. Wong, Introductory Nuclear Physics, Wiley

2. B. Cohen, Concepts of Nuclear Physics, McGrawHill

3. E. Segrè, Nuclei e Particelle, II edizione, Zanichelli

4. K.N. Mukhin, Experimental Nuclear Physics, MIR

5. L. Valentin, Noyaux and Particules, Hermann

For Sub-nuclear Physics topics:

1. B.R. Martin, G. Shaw, Particle Physics, IV edition, Wiley

2. F. Halzen, A.D. Martin, Quarks & Leptons, Wiley

3. B. Povh et al, Particelle e Nuclei, Bollati Boringhieri

4. W.E. Burcham, M. Jobes, Nuclear and Particle Physics, Longman 

5. A. Bettini, Introduction to Elementary Particle Physics, Cambridge

As a reference for exercises:

I. Lombardo, Problemi di fisica nucleare e subnucleare, CEA Zanichelli

Learning Assessment

Learning Assessment Procedures

The examination consists of a written test and an oral test. The written test lasts 2 hours for the 6-CFU track and 3 hours for the 9-CFU track, requiring students to solve 4 (6 CFU) or 6 (9 CFU) exercises of the type covered in class. During the written exam, students may use a formula sheet provided by the instructor, containing data, formulas, and tables useful for solving the exercises. A score of 15/30 or higher on the written exam is required to pass and qualify for the oral exam. The oral exam will cover all topics in the syllabus. The final grade will take the written exam result into account, but the arithmetic mean of the scores from the two tests will not be calculated.

Examples of frequently asked questions and / or exercises

all the topics discussed in the course