Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.

Lecture

CKM Matrix Elements

In course

PHYS-416: Particle physics II

This course aims to make students familiar and comfortable with the main concepts of particle physics, providing a clear connection between the theory and relevant experimental results, including the most recent ones from modern particle physics experiment ...

Description

This lecture covers the determination of the CKM matrix elements through various decays, such as leptonic, semi-leptonic, and neutrino scattering. It discusses the theoretical uncertainties associated with meson decays and the experimental challenges in dealing with neutrinos. The lecture also delves into particle-antiparticle mixing, wave-function evolution, decay rates, and CP violation in the kaon and B-meson systems.

Instructor

Lesya Shchutska

Official source

Ontological neighbourhood

Physics

Particle physics: Standard Model

Related concepts (32)

CP violation

In particle physics, CP violation is a violation of CP-symmetry (or charge conjugation parity symmetry): the combination of C-symmetry (charge symmetry) and P-symmetry (parity symmetry). CP-symmetry states that the laws of physics should be the same if a particle is interchanged with its antiparticle (C-symmetry) while its spatial coordinates are inverted ("mirror" or P-symmetry). The discovery of CP violation in 1964 in the decays of neutral kaons resulted in the Nobel Prize in Physics in 1980 for its discoverers James Cronin and Val Fitch.

Kaon

In particle physics, a kaon (ˈkeɪ.ɒn), also called a K meson and denoted _Kaon, is any of a group of four mesons distinguished by a quantum number called strangeness. In the quark model they are understood to be bound states of a strange quark (or antiquark) and an up or down antiquark (or quark). Kaons have proved to be a copious source of information on the nature of fundamental interactions since their discovery in cosmic rays in 1947.

Neutral particle oscillation

In particle physics, neutral particle oscillation is the transmutation of a particle with zero electric charge into another neutral particle due to a change of a non-zero internal quantum number, via an interaction that does not conserve that quantum number. Neutral particle oscillations were first investigated in 1954 by Murray Gell-mann and Abraham Pais. For example, a neutron cannot transmute into an antineutron as that would violate the conservation of baryon number.

Particle physics

Particle physics or high energy physics is the study of fundamental particles and forces that constitute matter and radiation. The fundamental particles in the universe are classified in the Standard Model as fermions (matter particles) and bosons (force-carrying particles). There are three generations of fermions, although ordinary matter is made only from the first fermion generation. The first generation consists of up and down quarks which form protons and neutrons, and electrons and electron neutrinos.

Pion

In particle physics, a pion (or a pi meson, denoted with the Greek letter pi: _Pion) is any of three subatomic particles: _Pion0, _Pion+, and _Pion-. Each pion consists of a quark and an antiquark and is therefore a meson. Pions are the lightest mesons and, more generally, the lightest hadrons. They are unstable, with the charged pions _Pion+ and _Pion- decaying after a mean lifetime of 26.033 nanoseconds (2.6033e-8 seconds), and the neutral pion _Pion0 decaying after a much shorter lifetime of 85 attoseconds (8.

Related lectures (30)

CP Violation in the Early Universe

Explores CP violation in the early universe, focusing on matter/antimatter asymmetry and the CKM matrix.

The CKM Matrix and CP Violation

Covers CP violation, the CKM matrix, quark interactions, and neutral kaons.

Baryon Asymmetry and Particle Physics

Explores nucleosynthesis, baryon asymmetry, CP violation, and the stability of the proton in particle physics.

Particle Physics: Fundamentals and Interactions

Covers the basics of particle physics, including elementary particles, forces, the Standard Model, and rare phenomena at the LHC.

The weak interactions of leptons